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[QUOTE=silent.volcano;182597]1. Water is heated in a kettle. The inside water is heated by convection. A person sitting near the fire receives heat by :

a) Conduction
b) Convection
c) Radiation
d) Reflection
e) None of these

its answer should be radiation not conduction because conduction is the heat transferred with in the body.
when heat is radiated by the kettle the person sitting near the fire receives the heat[/QUOTE]
While radiation is transfer of heat through empty space (without any molecules, electrons or any other material)
Convection is the transfer of heat through movement of molecules, in this case, the molecules of air (gases) transfer the heat, so correct answer is Convection. Read [url]http://en.wikipedia.org/wiki/Heat_transfer[/url] for more clearance of concept.

Well I personally believe that the transfer of heat is at a time by all methods but almost always one method is predominant. So we consider that as correct answer.

thanks for a reply.

i am still not convinced.

as far as i know convection is basically vertical movement of heat.

@silent volcano
i agree with you
infra-red [B]radiation[/B] reaches the person and he feels heat.so radiation is right answer.

convection heats molecules ,hot and light molecule move up,person is not sitting up.cool molecules move downward so it seems that convection is not possible.
radiation travels easily through air.

[QUOTE=DEADLYDOCTOR;182648]@silent volcano
radiation travels easily through air.[/QUOTE]
firstly radiations travel through empty space, yeah you are right air does not stop traveling radiations. Okay lets do an experiment.

Point A (A highSpeed fan)........Point B (sitting person)................point C( Source of heat).
now if fan blows the air at about speed of 200 Km per hour or more. The person will feel almost no heat.
Why? We know the moving air does not stop heat transfer while in this case it has almost stopped.
How? because the transfer of heat was through a medium, gas molecules which are not not coming from the direction of source of heat.
So what was the medium for transfer of heat? Had it been radiation, not even 600 km/hour blown air not been able to stop this transfer. because radiation is independent of movement of air. while convection needs movement of air molecules.
So the main transfer of heat was by air and not radiation.

[IMG]http://okfirst.mesonet.org/images/cond_conv_rad_small.jpg[/IMG]

Conduction- energy is transferred by the direct contact of molecules, not by the movement of the material

Example: putting your hand on a stove burner. The amount of energy transferred depends on how conductive the material is. Metals are good conductors, so they are used to transfer energy from the stove to the food in pots and pans. Air is the best insulator, so good insulating products try to trap air and not allow it to move.
Convection- energy is transferred by the mass motion of groups of molecules resulting in transport and mixing of properties

Example: holding your hand over a stove burner. In meteorology, we speak of convection predominantly as that caused by rising currents of warm air. We refer to all other mass motions of air as advection.
[B]Radiation- energy is transferred by electromagnetic radiation[/B]

Example: heat felt when standing away from a large fire on a calm night. Everything that has a temperature above absolute zero radiates energy. Radiation is not "felt" until it is absorbed by a substance. It does not require a medium to transfer energy through as do conduction and convection.

question say[B]"A person sitting near the fire receives heat by "[/B] so answer seems to be radiation.

i hope its clear now

Convection is not solely vertical or upward movement, yeah it easily occurs in upward direction.
prove my hypotheses wrong, as radiation is through electromagnetic radiations, so why did heat stop transferring when air in opposite direction was blown because Electromagnetic radiation don't depend on movement of air. So it must be something else not radiation.
Okay brother, it seems I am not going to be convinced by you, and neither you are going to be convinced by me. contact some good physicist for right answer and also tell him about my argument and hypotheses.

@ arbab
dear you are convinced ,but not ready to admit
as far your hypothesis or experiment is concerned:
heat radiation is transferred in the form of small packets of energy and when these packets are absorbed by a body it heats up. if air blows against source then these packets of energy will not reach body and one will not feel heat.
now its your turn to prove your hypothesis or ....

2. A time can come when we will be able to design a machine which can go on working f

you see the question asked is WITHOUT ENERGY and the solor energy is again an ENERGY, so the answer is NO

to put it in a layman's terms:

conduction is the heat transfer through contact...convection is the heat transfered through mixing and radiation is the heat emitted by a hot body...so the answer was radiation...any science student should have no doubts about it..:P

@Arbab Danish: In reply to your hypothesis

If we were to believe in your hypothesis then the following scenario must be true as well:

it is a sunny day and a cool breeze from the sea is blowing inland...you would not feel as much heat as you would in case it was a sunny day and there was no breeze...so do you suggest that the sun suddenly radiated lesser amount of energy?...When you have a fire in the room, and you turn on a fan, radiation remains there, but its effect is lessened because of (assumingly) cold air that is being thrown at you by the Fan....

secondly energy transfer is not through a single process alone...in most cases there are many modes of transfer...in a room, with a heater on, you receive energy through both convection and radiation and probably conduction too in case you have a fall on the fire :ohmy:.....in a scenario where you would be directly in front of the fire, the major chunk of energy transfer would be radiation, if you are behind some wall or anything it will be convection...

Assalam-o-Alaikum,

Convection is the movement ov molecules within fluid (Liquids, gases & Rheids), Radiation should be da answer!

Only Hermaphroditism iz a form ov Sexual reproduction. Rest belong to Asexual..dat iz for sure!

[QUOTE=The Star;173765]Energy can be converted into matter or other forms of energy but can not be produced.a machine can not produce energy without consuming matter or any other form of energy,it only converts one form into another.This is a well established and well known fact of mechanics.so the answer should be no.

Convection can not take place in solids.it takes place in atmosphere.cloud formation is the result of convection.convection might be correct answer.[/QUOTE]
-convection is the right answer coz radiation onli takes place where dere is no medium ..
-and conduction onli takes place onli in solids ..
-covection needs sum fluid to transfer heat. So in dis case , air acts as a fluid

[QUOTE=Saqiyasi;211956]-convection is the right answer coz radiation onli takes place where dere is no medium ..
-and conduction onli takes place onli in solids ..
-covection needs sum fluid to transfer heat. So in dis case , air acts as a fluid[/QUOTE]

Please note convection takes place in liquids, conduction takes place in solids and gases where as radiation phenomenon in which radiant energy is released is only observe if the pot containing water is heated to an extent so that it start glowing and emit light which is actually the radiant energy(e.g of radiation phenomenon is SUN emitting heat waves and if an IRON piece is put on fire for a long time so it gets really hot and emit radiation).

The answer of this very first MCQ is conduction, reason being that conduction is the gradual transfer of heat from high concentration end to lower concentration end. In this case AIR act as a medium and transfer the heat energy. The physics involve behind is that when water in pot is heated up, the high energy atoms gains energy and releases electron, thus water moecules are converted into vapors, the vapors emnating from the surface of water are hot interact with the atoms of air molecules and air molecues standing at lower energy level gains energy and starts to vibrate, this way the transfer of energy from one air molecule passes to another and spread in the near environment.

I have confirmed this with a Physics professor. Regarding those members who have written Radiation, for them radiation only takes place in electromagnetic range and in this case it is not a valid answer.

Hope this helps clarify the concept behind this tough MCQ.

Friends why not tabulate the MCQ's while waiting for the results.
I am giving the answers I wrote as well as the right ones if I was wrong.
Any error rectified may be appreciated.

1. C. Radiation
2. A. No
3. A. Hygrometer
4. I wrote 'C. Time Period' but it is wrong. The correct answer is 'A. Distance'
5. A. N,P,K
6. E. None of these
7. B. Non-Conductor
8. I wrote 'C. 56 ft', but it was a guess
9. A. Pitch
10. B. Transparent
11. I wrote 'B. 12 feet', but again a wild guess
12. C. Ultrasonic
13. D. Fusion nuclear reaction
14. I wrote 'E. None of thse' but it wrong. The correct answer is 'D. Distance
15. I wrote 'A. Zn+Ni' but it is wrong. The correct answer is 'C. Cu+Ni'
16. B. South Pole
17. I wrote 'D. Temp where body is kept', but a wild guess
18. C. Milk
19. I wrote 'E. None of these' but it is wrong. Plz supply the correct answer
20. B. Mariana Trench
21. Refraction of light
22. D. Decreasing focal length of the lens
23. I wrote 'A. Cu+Ni' but it is wrong. The correct answer is 'B. Copper,Tin'
24. B. Pakistan
25. I wrote 'C. Cappillarity' but i think it wrong
26. A. An equal and opposite pressure acts from inside
27. C. Nuclear Radiation
28. I wrote 'C. 7 Miles/S' but it was only a guess
29. I wrote 'D. Ultraviolet' but the right answer is 'C. Infrared'
30. I wrote 'D. Plano Convex Lens' but the answer is 'A. Convex Lens'
31. I made a wild guess of E. None of these
32. C. Richter Scale
33. A. 88 Days
34. C. Primitive
35. A. A continuing process
36. C. Mutation
37. I made a guess of D. Mutated genes
38. A. Ingestion,Digestion,Absorption,Elimination
39. C. Small Intestine
40. Essential nutrient level
41. I wrote 'D.Monosaccharide' but i think it is wrong
42. I wrote 'A. Bronchiole' but the right answer is D.Trachea
43. I wrote 'B. Fission' but not sure whether it is right or not
44. I wrote 'C. Not a Magnet' but I am definitely wrong
45. C. Nitrogen+Oxygen
46. E. None of these
47. C. Control Unit
48. C. Hydrogen
49. C. Chemotherapy & Radiotherapy
50. I wrote 'E. None of these' but it is wrong

Plz correct me augmenting facts with your answers.

Well the answers of MCQs are correct but as i feel few mistakes are there which can be correct.
1. Hepatitis A is transmitted by Faeces not water.
2. Animal obtained carbohydrate from Glycogen not starch( it is used in plants)

42. if i remeber correctly, bronchiole is correct.
44. is a strong magnet, i got this wrong
40. is actually basal metabolism. mine went wrong too.
37. is multiple genes.
24. is kenya
11. 3 feet. got this wrong too.

I know 8 of mine are confirmed wrong. I hope don't lose more than 5 others. Hopefully could end up getting 37-39 in EDS objectives.

41. should be vitamin C

As for Hepatitis A, it is a tricky question. It goes from individual to medium through faeces, but from medium to individual through water. Nobody knows what the examiner had in mind when he made the paper. i myself put water.

Dear Sakk,

I don't know who that professor was but one thing is for sure that the type of radiation you were referring to is called "Electromagnetic Radiation" and not simple radiation.

Furthermore, for all those who think its Convection or Conduction then why is the car's radiator called called a Radiator? although the water at the surface of the radiator gets heated by conduction and then that heat spreads via convection throughout the radiator, but the heat from the radiator is transferred via radiation!! i hope this will be enough..

As far as hepatitus is concerned, it is spread by feaces. the agent that gets transfered from one body to another is the feaces. the medium through which it gets transferred is water (probably it may not be able to get transferred through air) there is a difference between agent and the medium!!!

[QUOTE=Sakk;212173]Please note convection takes place in liquids, conduction takes place in solids and gases where as radiation phenomenon in which radiant energy is released is only observe if the pot containing water is heated to an extent so that it start glowing and emit light which is actually the radiant energy(e.g of radiation phenomenon is SUN emitting heat waves and if an IRON piece is put on fire for a long time so it gets really hot and emit radiation). [/quote]

I have answered that already! that will be called Radioactive Radiation! there is a difference... the Sun does not emit radiation because it is hot. It is hot because there are is Fusion reaction going there and that is why energy is released. For Iron to emitt radiations (Electromagnetic Radition that is) one has to heat it to insanely high temperatures.

The physics involve behind is that when water in pot is heated up, the high energy atoms gains energy and releases electron, thus water moecules are converted into vapors, the vapors emnating from the surface of water are hot interact with the atoms of air molecules and air molecues standing at lower energy level gains energy and starts to vibrate, this way the transfer of energy from one air molecule passes to another and spread in the near environment.

[B]brother you have misunderstood the concept again! when water turns into vapors it does not release electrons. it just breaks the bonds between the water molecules and escape to the surrounding. it does not loose electrons. if it were loosing electrons we would not be calling water vapors (because if the number of electrons decrease/increase it turns into ions and no longer remain molecules) [/B]

Let it be faeces, i was counting it incorrect anyways.

My take on the first one is also radiation. Conduction is impossible (air is a very poor conductor), only possibilities are convection and radiation. Infact both do occur, which is required is the issue.

What is your (Umar's ) take on objective 10? Highly confusing one it is.

brother...the answer to this one is that light is visible....if it were not visible, dust particles or vaccum, or anything, you wouldnt be able to see it in the first place...the dust particles were just a catch..

opaque etc etc don't make any sense :)

As an engineer its my opinion that its against basic laws of science

rameez
bhai do not mind
app engineer ho tu yaha aur bhi engineer hain aur i think app se better hain
agar app visibility of light k bary mein keh rahy hain k it is against the law
then app apni first term ki book physics ki book ko consult karo(used in uet first term) ye tu first term k viva ka first question hai
app hamain bhi proof ker dein to appki nawazish
hum apni mistake accept ker lein gay

Answer of all objective pf 2010 every day science paper

[QUOTE=HIDAYAT ULLAH 173759]1. Water is heated in a kettle. Te inside water is heated by convection. A person sitting near the fire receives heat by :

a) Conduction

2. A time can come when we will be able to design a machine which can go on working for ever without the expenditure of energy. Is it possible ?

a) [B]No

3. The measurement of rainfall is made by an instrument known as :

e) None of these

4. Light year is a unit of :

a) [B]Distance

5. Three elements needed for the healthy growth of plants are :

a) [B]N,P,K

6.Copper can be converted into gold by :

b) Artificial Radioactivity

7. In winter an iron pipe feel colder than a wooden window . This is because wood is :

b) [B]non-Conductor

8. The echo (reflected sound) will be distinctly heard only at ordinary temperatures if the distance of the reflecting surfaces from the source of sound is at least :

a) 1120 ft

9. It is possible to recognize a person in the dark by simply hearing his unique voice . It is because of the:

a) QUALITY

10. When a ray of sunlight enters a dark room , its straight path become visible because of dust particles hanging in the air. It is because light is :

a) Visible

11. A six feet tall lady wants to see her full image in a plane mirror . The minimum length of the mirror will be :

a) 6 feet

12. The principle used in radar is the same as that of Sonar. In radar we use radio waves ; whereas in sonar we use :

c) Ultrasonic

13. In a fission nuclear reaction , a heavy nucleus breaks up into smaller nuclei whereas in another nuclear reaction two or more than two possibly nuclei are fused to form a heavy nucleus This nuclear reaction is called :

c) Fission nuclear reaction

14. Parsec is a unit of :
d) [B]Distance [/B]

15. German Silver is an alloy of:

c) Cu + Ni

16. The Continent Antarctica lies at the:

[B]South pole[/B] c)

17. The temperature of the dead body is.

d)[B] temperature of the place where it is kept [/B]

18. Lactometer is a type of Hydrometer which is used to measure the specific gravity of :

c) [B]Milk [/B]

19. Cusec is a unit of :

e) None of these

20. The deepest place on earth is :

a)
b) [B]Mariana Trench

21. of stars is caused by :

c) refraction of light
;hm i am setting here in very cold room and my tipping speed is also very slow so i am sorry to say that i cannot solove any more objective;

Answer of all objective pf 2010 every day science paper

for the notes of everyday science plz follow the link
[url]http://www.cssforum.com.pk/css-compulsory-subjects/everyday-science/493-helpful-websites-eds-2.html[/url]

1st objective ans is radiation i think plz confirm it becz according to my knowledge conduction take place through some material medium
plz clear this point

11 mcq correct ans is 3 feet it is confirm ans for detail ans see university phy by HERRIS BENSON page no 721 example no 35.7

Plz Answer these Q?

[B]Question # 07:[/B]
A) In which organ these parts are present in animals or human body ? (5)
B) Describe the function of each briefly : (5)

Coronary artery
Sino- Auricular Node
Aortic valve
Auricle

[B]Question # 04[/B]: Write briefly any five of the following: (Answer in three or four sentences) (10)

a) Plaster of Paris
b) Reflex Action
c) Pace Maker
d) Swine flue
e) Microwave oven
f) Internet
g) Voltage Stabilizer

i do agree its radiation.

q no 7 ans is
these r part of heart and there function is
cortied artery supply blood to head and face
aortic valve present between atrium and and ventricle its name written in book is semilunar valve i am not confirm about it
and auricle r two chamber of heart which recive oxygenated and deoxygenated blood and deliver to body and lungs respectively

Every Day science Paper 2010
________________________________________
PART-1(MCQs)
COMPULSORY

Question 1. Select the best option and fill in the appropriate Box on the answer sheet: (50 Marks)

1. Water is heated in a kettle. The inside water is heated by convection. A person sitting near the fire receives heat by:

a) Conduction
[B]b) Convection [/B]
c) Radiation
d) Reflection
e) None of these

2. A time can come when we will be able to design a machine which can go on working for ever without the expenditure of energy. Is it possible?

[B]a) No [/B]
b) Yes
c) In due course time
d) Very soon
e) None of these

3. The measurement of rainfall is made by an instrument known as :

a) Hydrometer
b) Barometer
c) Hygrometer
d) Pedometer
[B]e) None of these (Rain gauge)[/B]

4. Light year is a unit of:

[B]a) Distance [/B]
b) Time Period
c) Light intensity
d) Time
e) none of these (Length)

5. Three elements needed for the healthy growth of plants are :

[B]a) N,P,K [/B]
b) N,C,P
c) N,K,C
d) N,S,P
e) none of these

6.Copper can be converted into gold by :

a) Heating
[B]b) Artificial Radioactivity [/B]
c) Electroplating
d) Chemical reaction
e) None of these

7. In winter an iron pipe feel colder than a wooden window. This is because wood is :

a) Conductor
[B]b) non-Conductor [/B]
c) Semi- Conductor
d) Not a solid while iron is a solid
e) None of these

8. The echo (reflected sound) will be distinctly heard only at ordinary temperatures if the distance of the reflecting surfaces from the source of sound is at least :

a) 1120 ft
b) 120 ft
[B]c) 56fft [/B]
d) 100 ft
e) None of these

9. It is possible to recognize a person in the dark by simply hearing his unique voice. It is because of the:

[B]a) pitch [/B]
b) Frequency
c) Time period
d) Quality
e) None of these

10. When a ray of sunlight enters a dark room, its straight path become visible because of dust particles hanging in the air. It is because light is:

a) Visible
[B]B) Transparent [/B]
c) Invisible
d) opaque
e) None of these

11. A six feet tall lady wants to see her full image in a plane mirror. The minimum length of the mirror will be :

a) 6 feet
b) 12 feet
c) 4 feet
[B]d) 3 feet [/B]
e) None of these

12. The principle used in radar is the same as that of Sonar. In radar we use radio waves ; whereas in sonar we use :

A) red waves
b) Infrared waves
c) Ultrasonic
[B]d) super sonic [/B]
e) None of these

13. In a fission nuclear reaction , a heavy nucleus breaks up into smaller nuclei whereas in another nuclear reaction two or more than two possibly nuclei are fused to form a heavy nucleus This nuclear reaction is called :

a) Chemical Reaction
b) Nuclear reaction
c) Fission nuclear reaction
[B]d) Fusion nuclear reaction[/B]
e) None of these

14. Parsec is a unit of:

a) Energy
b) Time
c) Power
[B]d) Distance [/B]
e) None of these

15. German Silver is an alloy of:

[B]A) Zn + Ni [/B]
b) Cu + Zn
c) Cu + Ni
d) Cu + Sn
e) None of these

16. The Continent Antarctica lies at the:

a) North pole b) [B]South pole[/B] c) middle of the earth d) Equator
e) None of these

17. The temperature of the dead body is:

a) 0 'C
b) 37 '
c) room temperature
[B]d) temperature of the place where it is kept[/B]
e) None of these

18. Lactometer is a type of Hydrometer which is used to measure the specific gravity of :

a) Honey
b) Water
[B]c) Milk [/B]
d) olive oil
e) None of these

19. Cusec is a unit of:

a) Area
b) Time
c) Distance
d) mass
[B]e) None of these[/B](flow of liquid)

20. The deepest place on earth is:

a) Trench
[B]b) Mariana Trench [/B]
C) Mangrove
d) Groove
e) None of these

21. Twinkling of stars is caused by:

a) Reflection of light
b) Polarization of light
[B]c) refraction of light [/B]
d) Interference of light
e) None of these

22. Magnifying power of a simple microscope can be increased by:

a) increasing focal length of the lens
[B]b) Decreasing focal length of the lens[/B]
c) Lens of large aperture
d) lens of short aperture
e) None of these

23. Bronze medal is made up of metal:

a) Copper, Zinc
b) Copper, Nickle
[B]c) Copper, Tin [/B]
d) Supper, Silver

24. One of the countries through which equator passes is:

[B]a) Kenya [/B]
B) Pakistan
c) Malaysia
d) Malta
e) None of these

25. A very important practical application of properties of matter is hoeing or "godi" practiced by the farmers. This property of matter is called:

a) Elasticity
b) Stress
[B]c) Capillarity [/B]
d) Strain
e) None of these

26. It is observed that the total pressure exerted by air on the man of average siz is around 14.7 lb wt. per square inch. But the man feels quite comfortable,. It is because of :

[B]a) An equal and opposite pressure acts from inside[/B]
b) of the height of a man
c) of gravity
d) Earth pulls the man upward
e) None of these

27) A nuclear reactor is a device used to carry out controlled nuclear reaction whereas GM counter is a device used to detect :

a) Current
[B]b) Voltage [/B]
C) nuclear Radiation
d) power
e) None of these

28. A body can escape the gravitational pull of the earth if it is thrown up with a velocity of:

a) 25 miles per sec
b ) 60 miles per sec
[B]c) 7 miles per sec [/B]
d) 10 miles per sec
e) None of these

29. Night vision is possible with the help of :

[B]a) Red light [/B]
b) Violet light
c) Infrared Rays
d) Ultra violet Light
e) None of these

30. Myopia is a defect of human eye. it can be corrected by using a lens called :

a) Convex lens
[B]b) Concave lens [/B]
c) Cylindrical lens
d) Plano convex lens
e) None of these

31. Walnuts can be broken in the hand by squeezing two together but not one. It is because of:

[B]a) Work done [/B]
b) Power
c) Energy
d) Volume
e) None of these

32. The instrument which i specially design for recording earth quake wave is called seismograph which measure earth quake waves on a

a) Diatonic scale
b) Fahrenheit Scale
[B]c) Richter scale [/B]
d) Celsius Scale
e) None of these

33. The planet Mercury completes one rotation around the sun is
[B]a) 88 days[/B]
b) 365 days
c) 98 days
d) 60 days

34. Fossils found in the lowest geological strata are generally most:

a) Advance
b) Complex
[B]c) Primitive [/B]
d) Specialized
e) None of these

35. Evolution can be described as:

[B]a) A continuing process [/B]
b) A catastrophic event in the past
c) Static
d) The attaining of an ideal type
e) None of these

36. What is the only source of new alleles?

[B]a) Crossing over [/B]
b) independent assortment
c) Mutation
d) Fertilization
e) None of these

37. Polygenic characteristic are controlled by:

[B]a) Dominant genes [/B]
b) Recessive genes
c) Multiple genes
d) Mutated genes
e) none of these

38. Which of the following, lists the four stages of food processing in order?

[B]a) ingestion , digestion , absorption , elimination[/B]
b) digestion , ingestion , absorption , elimination
c) ingestion , absorption , elimination , digestion
d) absorption , digestion , ingestion , elimination
e) None of these

39. In humans, most nutrient molecules are absorbed by the:

[B]a) small intestine [/B]
b) stomach
c) liver
d) large intestine
e) None of these

40. The energy needed to fuel essential body processes is called:

a) Essential nutrient level
[B]b) Basal metabolism[/B]
c) None of these
d) recommended daily allowance
e) Optimum energy intake

41. Which of the following is an organic molecule needed by the body in small amounts?

a) Protein
b) Vitamin C
[B]c) Zinc [/B]
d) Monosaccharide
e) None of these

42. Inhaled air passes through which of the following in the last?

[B]a) Bronchiole [/B]
b) Larynx
c) Pharynx
d) Trachea
e) None of these

43. Which of the following is a form of sexual reproduction?

[B]a) Hermaphrodites [/B]
B) Fission
c) Fragmentation
d) Budding
e) None of these

44. Cobalt is a material which is:

[B]a) Strongly attracted by a magnet [/B]
B) Not attracted by a magnet
c) not a magnet
d) Weakly attracted by a magnet
e) None of these

45. Laughing gas has chemical composition of the following two elements which are :

a) Nitrogen + Hydrogen
b) Nitrogen + Carbon
[B]c) Nitrogen + oxygen [/B]
d) Oxygen + Carbon
e) None of these

46. Hepatitis A is transmitted to different individuals by :

a) Water
b) Sneezing
c) Spit
[B]d) Feces [/B]
e) None of these

47. The unit that coordinates different devices of the computer system is :

a) ALU
b)Register
[B]c) Control unit [/B]
d) Logical instruction
e) None of these

48. The most abundant element present is in the human body is:

a) Nitrogen
[B]b) Oxygen [/B]
c) Carbon
d) Hydrogen
e) None of these

49. Cancer can be treated by:

a) Antibiotics and vaccines
b) Radiotherapy and antibodies
[B]c) Chemotherapy and radiotherapy[/B]
d) Antibodies and chemotherapy
e) None of these

50. Animals obtain carbon dioxide mainly from:

a) Starch
b) Sucrose
c) Glucose
[B]d) Glycogen [/B]
e) None of these

Part - 2

Attempt only five questions. All questions carry equal marks. (50 Marks)

Question # 02 : Write shot note on the following by giving their exact life span and contributions to the field of science. ( Accurate fact will be appreciated) (10)

a) Al- Beruni
b) Ibn- al - Haitham

Question # 03: What do you know about hereditary disease ? Comment how they are transferred from parents to offsprings ? (10)

Question # 04: Write briefly any five of the following: (Answer in three or four sentences) (10)

a) Plaster of Paris
b) Reflex Action
c) Pace Maker
d) Swine flue
e) Microwave oven
f) Internet
g) Voltage Stabilizer

Question # 05:
A) What is global warming ? Is there any a sunny side to global warming? If yes, explain. (5)
B) What makes the seasons happen ? (5)

Question # 06: In which region of the world , the following animals are found? Give two main characteristics of each. (10)

a) blind dolpin
b) Kangaroo
c) panda
d) Kiwi
e) Penguin

Question # 07:
A) In which organ these parts are present in animals or human body ? (5)
B) Describe the function of each briefly : (5)
1. Coronary artery
2. Sino- Auricular Node
3. Aortic valve
4. Auricle
Question # 08: Differentiate between the following pairs:

a) Hydrometer and Hygrometer
b) Perimeter and Telemeter
c) Isotopes and Isomers
d) Flying mammal and Bird
e) Vertebrates and Invertebrates

Question # 09:
A) What are pesticides? Explain how these are dangerous to human beings?
B) What do the following scientific abbreviations stand for?

1) STP
2) LORAN
3) SONAR
4) MAF
5) MeV
6) MASER
7) AWACS
8) CCTV

1) STP: Standard Temperature and Pressure
2) LORAN: Long Range Navigation
3) SONAR: Sound Navigation and Ranging
4) MAF: Million Acre Feet
5) MeV: Million Electron Volt, Mega electron Volt
6) MASER: Microwave Amplification By Stimulated Emission of Radiation
7) AWACS: Airborne Warning and Controlling System
8) CCTV : Closed Circuit Tele Vision

mcq n0 43 ans is hermaphrotidism

bcz it means having both sex organs in one body so they can reproduce sexually

This is most confused question and discuss many peoples here is right answer with reference
1. Water is heated in a kettle. The inside water is heated by convection. A person sitting near the fire receives heat by:

a) Conduction
b) [B]Convection [/B]
c) Radiation
d) Reflection
e) None of these

Reference is Fundamental of Physics by Halliday Resnick Walker Page no 627 8th edition

It would nt happen, u r simply ruling out law of thermodynamics,it is impossible.

see reference it is from thermodynamics chapter.

thank you for solving the paper:))

ds z all very confusing everyone z givin their own answers plz post original answers

are these answers are correct

solar energy is a form of energy. the answer is no

solve mcqs EDS 2010

[LEFT][/LEFT]let the forum members help out sorting correct answers.do any body know
1.Water is heated in a kettle.The inside water is heated byconvection. A person sittingnear the fire receives heat by
: a) Conduction
b) Convection
c) Radiation
d) Reflection
e) None of these
2. A time can come when we
will be able to design a
machine which can go on
working for ever without theexpenditure of energy. Is itpossible ?
a) No
b) Yes
c) In due course time
d) Very soon
e) None of these
3. The measurement of rainfallis made by an instrument known as
: a) Hydrometer
b) Barometer
c) Hygrometer
d) Pedometer
e) None of these
4. Light year is a unit of
: a) Distance
b) Time Period
c) Light intensity
d) Time
e) none of these
5. Three elements needed forthe healthy growth of plants are :
a) N,P,K
b) N,C,P
c) N,K,C
d) N,S,P
e) none of these
6.Copper can be converted
into gold by :
a) Heating
b) Artificial Radioactivity
c) Electroplating
d) Chemical reaction
e) None of these
7. In winter an iron pipe feelcolder than a wooden
window . This is because
wood is
: a) Conductor
b) non-Conductor
c) Semi- Conductor
d) Not a solid while iron is a
solid
e) None of these
8. The echo (reflected sound)will be distinctly heard only atordinary temperatures if the
distance of the reflecting
surfaces from the source of
sound is at least :
a) 1120 ft
b) 120 ft
c) 56fft
d) 100 ft
e) None of these
9. It is possible to recognize aperson in the dark by simplyhearing his unique voice . It isbecause of the:
a) pitch
b) Frequency
c) Time period
d) Quality
e) None of these
10. When a ray of sunlight
enters a dark room , its
straight path become visible
because of dust particles
hanging in the air. It is becauselight is :
a) Visible
B) Transparent
c) Invisible
d) opaque
e) None of these
11. Animals obtain carbon
dioxide mainly from :
a) Starch
b) Sucrose
c) Glucose
d) Glycogen
e) None of these
. . . , . . . . . . . .. .. . . . . . . . . . . ,
. . . .

[B]1.Radiation(when heat moves through a surface without surface contacting the origin of heat)
2.No
3.i think none of these
4.Distance
5.option b or c :confused::confused:
6.artificial radioactivity
7.non-conductor
8.:unsure:
9.pitch
10.:con:con
11.glucose[/B]

[QUOTE=tariq001;396573][LEFT][/LEFT]let the forum members help out sorting correct answers.do any body know
1.Water is heated in a kettle.The inside water is heated byconvection. A person sittingnear the fire receives heat by
: a) Conduction
b) Convection
c) Radiation
d) Reflection
e) None of these
2. A time can come when we
will be able to design a
machine which can go on
working for ever without theexpenditure of energy. Is itpossible ?
a) No
b) Yes
c) In due course time
d) Very soon
e) None of these
3. The measurement of rainfallis made by an instrument known as
: a) Hydrometer
b) Barometer
c) Hygrometer
d) Pedometer
e) None of these
4. Light year is a unit of
: a) Distance
b) Time Period
c) Light intensity
d) Time
e) none of these
5. Three elements needed forthe healthy growth of plants are :
a) N,P,K
b) N,C,P
c) N,K,C
d) N,S,P
e) none of these
6.Copper can be converted
into gold by :
a) Heating
b) Artificial Radioactivity
c) Electroplating
d) Chemical reaction
e) None of these
7. In winter an iron pipe feelcolder than a wooden
window . This is because
wood is
: a) Conductor
b) non-Conductor
c) Semi- Conductor
d) Not a solid while iron is a
solid
e) None of these
8. The echo (reflected sound)will be distinctly heard only atordinary temperatures if the
distance of the reflecting
surfaces from the source of
sound is at least :
a) 1120 ft
b) 120 ft
c) 56fft
d) 100 ft
e) None of these
9. It is possible to recognize aperson in the dark by simplyhearing his unique voice . It isbecause of the:
a) pitch
b) Frequency
c) Time period
d) Quality
e) None of these
10. When a ray of sunlight
enters a dark room , its
straight path become visible
because of dust particles
hanging in the air. It is becauselight is :
a) Visible
B) Transparent
c) Invisible
d) opaque
e) None of these
11. Animals obtain carbon
dioxide mainly from :
a) Starch
b) Sucrose
c) Glucose
d) Glycogen
e) None of these
. . . , . . . . . . . .. .. . . . . . . . . . . ,
. . . .[/QUOTE]

1c 2a 3e 4a 5a 6b 7b 8c 9a