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  #21  
Old Sunday, March 15, 2009
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@I.L


Then what are psychrometer and ammeter used for

Aur volatage is the electrical potential ?


Between ,pressure and temperature are not specifiied like atmospheric pressure or air pressure , then what ?? ,similar is the case with temperature ,like water or air etc etc , then how to answer
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  #22  
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Quote:
Then what are psychrometer and ammeter used for
A psychrometer is an instrument commonly used in laboratories to measure relative humidity in the air.

An ammeter is a measuring instrument used to measure the electric current in a circuit.

Quote:
Aur volatage is the electrical potential ?
Voltage is electric potential energy per unit charge, measured in joules per coulomb.
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  #23  
Old Sunday, March 15, 2009
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@Tauqeer Kurd & Last Island
Ammeter:an instrument used for measuring electric current in amperes.

voltmeter:an instrument calibrated in volts that measures the electromotive force or potential difference between two points in a circuit.


(iii) Adrenalin is secreted by the Adrenal Medulla


Adrenal Gland, vital endocrine gland that secretes hormones into the bloodstream, situated, in humans, on top of the upper end of each kidney. The two parts of the gland—the inner portion, or medulla, and the outer portion, or cortex—are like separate organs: They are composed of different types of tissue and perform different functions. The adrenal medulla, composed of chromaffin cells, secretes the hormone epinephrine, also called adrenaline, in response to stimulation of the sympathetic nervous system at times of stress. The medulla also secretes the hormone norepinephrine, which plays a role in maintaining normal blood circulation. The hormones of the medulla are called catecholamines. Unlike the adrenal cortex, the medulla can be removed without endangering the life of an individual.

The adrenal outer layer, or cortex, secretes about 30 steroid hormones, but only a few are secreted in significant amounts. Aldosterone, one of the most important hormones, regulates the balance of salt and water in the body. Cortisone and hydrocortisone are necessary to regulate fat, carbohydrate, and protein metabolism. Adrenal sex steroids have a minor influence on the reproductive system. Modified steroids, now produced synthetically, are superior to naturally secreted steroids for treatment of Addison's disease and other disorders.


rgds

-------------------------

1. Which of the following statements are true and which are false.
a) Bacteria are parasites
b) Ruby is an Oxide of Aluminum
c) In the Australian continent, days are longer than nights in June.
d) Gypsum is hydrated calcium carbonate chemically.
e) Twenty-three moons revolve around Saturn
f) Pluto is the coldest planet
g) Chromite ore contains chromium oxide
h) Mica is a nonconductor of electricity.
i) Sun is the biggest star in the universe.
j) The earth completes one rotation about its axis in 365.25 days.

4. Fill in the blanks
(i) The capacity to do work is called _________.
(ii) The energy possessed by a body die to its position is called _________.
(iii) Kitab al-Manazir is a publication by a famous Muslim scientist about _________.
(iv) _________ usually lies in the centre of an animal cell.
(v) Calcium and _________ are the essential elements of bones.
(vi) Proteins are formed by combination of _________.
(vii) Rainwater dissolves sulphur dioxide to form _________
(viii) The set of instructions given to a computer is called _________.
(ix) Chemicals such as penicillin which set on _________ are called antibiotics.
(x) Comet Shoemaker Levy 9 hit the planet _________ in July this year.


7. Give brief answers for any five of the following
(i) Name the two proteins found in milk.
(ii) What organ of human body controls the amount of water and salt in blood?
(iii) Drugs are classified into five major groups. Define any two.
(iv) How do chromosomes in a male and female (enter) in a human body?
(v) Which two gases do you exhale more than you inhale?
(vi) Name any two glands which secretes hormones in human body

Last edited by Princess Royal; Friday, March 20, 2009 at 12:46 AM.
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  #24  
Old Sunday, March 15, 2009
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1. Which of the following statements are true and which are false.
a) Bacteria are parasites(t)
b) Ruby is an Oxide of Aluminum(t)
c) In the Australian continent, days are longer than nights in June.(f)
d) Gypsum is hydrated calcium carbonate chemically.(f)
e) Twenty-three moons revolve around Saturn(f)
f) Pluto is the coldest planet(t- provided if u consider pluto a planet)
g) Chromite ore contains chromium oxide(t)
h) Mica is a nonconductor of electricity.(t)
i) Sun is the biggest star in the universe.(f)
j) The earth completes one rotation about its axis in 365.25 days.(f)

4. Fill in the blanks
(i) The capacity to do work is called _________.(energy)
(ii) The energy possessed by a body die to its position is called _________.(potential energy)
(iii) Kitab al-Manazir is a publication by a famous Muslim scientist about _________.(optical)
(iv) _________ usually lies in the centre of an animal cell.(nucleus)
(v) Calcium and _________ are the essential elements of bones.(phosphorus)
(vi) Proteins are formed by combination of _________.(amino acids)
(vii) Rainwater dissolves sulphur dioxide to form _________(sulphuric acid)
(viii) The set of instructions given to a computer is called _________.(software)
(ix) Chemicals such as penicillin which set on _________ are called antibiotics.(cant undestand the question)
(x) Comet Shoemaker Levy 9 hit the planet _________ in July this year.(jupiter(collision took place in july 1994))

7. Give brief answers for any five of the following
(i) Name the two proteins found in milk.(lactin and casein)
(ii) What organ of human body controls the amount of water and salt in blood?(kidneys)
(iii) Drugs are classified into five major groups. Define any two.
(iv) How do chromosomes in a male and female (enter) in a human body?(cant understand this one either)
(v) Which two gases do you exhale more than you inhale?(carbon dioxide and oxygen)
(vi) Name any two glands which secretes hormones in human body(thyroid and pancreas)
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  #25  
Old Monday, March 16, 2009
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Paper 1994
. Which of the following statements are true and which are false.
a) Bacteria are parasites(t)

b) Ruby is an Oxide of Aluminum(t)

c) In the Australian continent, days are longer than nights in June.(f)

In the Australian continent,nights are longer than days in June


Gypsum is hydrated calcium carbonate chemically.(f)

Gypsum is hydrated calcium Sulphate chemically


e) Twenty-three moons revolve around Saturn(f)

nine moons revolve around Saturn

f) Pluto is the coldest planet(t- provided if u consider pluto a planet)

g) Chromite ore contains chromium oxide(t)
Chromite ore contains oxide of chromium and iron

h) Mica is a nonconductor of electricity.(t)
Mica:aluminosilicate mineral

i) Sun is the biggest star in the universe.(f)

j) The earth completes one rotation about its axis in 365.25 days.(T)

AS we all know about leap year that comes after 4 years.

4. Fill in the blanks
(i) The capacity to do work is called _________.(energy)

(ii) The energy possessed by a body due to its position is called _________.(potential energy)

(iii) Kitab al-Manazir is a publication by a famous Muslim scientist about _________.(optics)
(iv) _________ usually lies in the centre of an animal cell.(nucleus)

(v) Calcium and _________ are the essential elements of bones.(phosphorus)

(vi) Proteins are formed by combination of _________.(amino acids)

(vii) Rainwater dissolves sulphur dioxide to form _________(sulphuric acid)

(viii) The set of instructions given to a computer is called _________.(Command)

(ix) Chemicals such as penicillin which act on _________ are called antibiotics.
Bacteria

(x) Comet Shoemaker Levy 9 hit the planet _________ in July this year(collision took place in july 1994) Mars( plz confirm this )

7. Give brief answers for any five of the following

(i) Name the two proteins found in milk.(albumin, globulin and casein)

@farooq_basir

Lectin: a plant protein: a protein found mainly in seeds and grains and their products, belonging to a group that binds to carbohydrates and causes blood cells to clump together.


(ii) What organ of human body controls the amount of water and salt in blood?(kidneys)

(iii) Drugs are classified into five major groups. Define any two.

Antibiotics
Antiparasitic
Antiviral
Antiprotozoal
Hormonal

(iv) How do chromosomes in a male and female differ in a human body.

male XY
Female:XX



(v) Which two gases do you exhale more than you inhale?

(carbon dioxide and oxygen)

(vi) Name any two glands which secretes hormones in human body(thyroid and PIYUITARY, Pancreas)

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  #26  
Old Monday, March 16, 2009
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j) The earth completes one rotation about its axis in 365.25 days.(T)

AS we all know about leap year that comes after 4 years.
@rana

earth completes one rotation aroud sun in 365.25 days,not about its axis.it completes one rotation about its axis in 23 hours 56 minutes and 4 seconds so the above statement is false.
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  #27  
Old Monday, March 16, 2009
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Quote:
Originally Posted by farooq_basir
@rana

earth completes one rotation aroud sun in 365.25 days,not about its axis.it completes one rotation about its axis in 23 hours 56 minutes and 4 seconds so the above statement is false.
Thanks dear for correction, but the earth revolves around the sun not rotates arrond it.It only rotates arround its axis.

rgds

------------

Paper 1994

9. Differentiate between any five of the following pairs.
(i) Veins and arteries
(ii) PNP and NPN transistor
(iii) Electronic current and static electricity
(iv) Concave and convex lens
(v) Fats and oils
(vi) Absorption and adsorption

13. Which part of a plant do they belong to?
(i) Ginger
(ii) Raddish
(iii) Potato
(iv) Cinnamon
(v) Peanut
(vi) Saffron
(vii) Almond
(viii) Chillies
(ix) Spinach
(x) Tomato


15. Fill in the blanks.

(i) In a heat engine, heat energy is changed into _________ (mechanical energy, magnetic energy, light energy)
(ii) Frequency of audible sound in Hertz (Hz) is _________ (20 – 20,000Hz, 20,000 – 30,000Hz, 30,000 – 4,000Hz)
(iii) Deficiency of vitamin B causes _________ (rickets, beriberi, night blindness)
(iv) Cheapest source of producing electricity is _________ (coal, natural gas, water)
(v) The smallest unit of measurement of wavelength is _________ (micrometer, angstrom, manometer)
(vi) The chemical generally used in refrigerators is _________ (ethylene, glycofreon, methyl alcohol)
(vii) The unit of ‘TON’ to specify air conditioners is equal to _________ (10,000 BTU/hour, 12,000 BTU/hour, 16,000 BTU/hour)
(viii) Unit of electricity ‘KILOWATT HOUR’ is the unit of (force, work, power)
(ix) Period of famous Muslim scientists is _________ (3rd – 5th century, 6th – 7th century, 7th – 13th century A.D.)
(x) Heat radiation travels at a speed equal to _________ (half the speed of light, speed of light, speed of wind)


rgds

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  #28  
Old Tuesday, March 17, 2009
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15. Fill in the blanks.

(i) In a heat engine, heat energy is changed into _________ (mechanical energy, magnetic energy, light energy)

(iii) Deficiency of vitamin B causes _________ (rickets, beriberi, night blindness)

(iv) Cheapest source of producing electricity is _________ (coal, natural gas, water)

(v) The smallest unit of measurement of wavelength is _________ (micrometer, angstrom, manometer)

(vi) The chemical generally used in refrigerators is _________ (ethylene, glycofreon, methyl alcohol)

(viii) Unit of electricity ‘KILOWATT HOUR’ is the unit of (force, work, power)

(ix) Period of famous Muslim scientists is _________ (3rd – 5th century, 6th – 7th century, 7th – 13th century A.D.)

(x) Heat radiation travels at a speed equal to _________ (half the speed of light, speed of light, speed of wind)
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  #29  
Old Tuesday, March 17, 2009
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@Marwa

Cheapest source of producing electricity is water .Coal is very costly on the contrary i guess.

Kilowatt hour is the unit of work.


13. Which part of a plant do they belong to?

(i) Ginger........................Stem
(ii) Raddish.....................Root
(iii) Potato.....................Stem
(iv) Cinnamon.................Bark of stem
(v) Peanut.....................Seed
(vi) Saffron...................Stigma/Flower
(vii) Almond...................Fruit
(viii) Chillies....................Fruit
(ix) Spinach...................leaves
(x) Tomato ...................fruit
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  #30  
Old Tuesday, March 17, 2009
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Correct Answers

Paper 1994

9. Differentiate between any five of the following pairs.
(i) Veins: carry deoxigenated blood to heart from body parts
and arteries carry oxigenated blood from body parts to heart.
Vains are thin and less elastic than artries.

(ii) PNP: and NPN transistor: PNP transistors is the one in which one N,type semiconductor is sandwithched in between two P type or accepter diodes while NPN transistor is the one in which two N type semiconductors are fitted on the both sides of p-type semiconductor to allow to pass current from them.

(iii) Electronic current:
and static electricity: Electricity occurs in two forms: static electricity and electric current. Static electricity consists of electric charges that stay in one place. An electric current is a flow of electric charges between objects or locations:

For your convenience I am putting here an example:

Static electricity can be produced by rubbing together two objects made of different materials. Electrons move from the surface of one object to the surface of the other if the second material holds onto its electrons more strongly than the first does. The object that gains electrons becomes negatively charged, since it now has more electrons than protons. The object that gives up electrons becomes positively charged. For example, if a nylon comb is run through clean, dry hair, some of the electrons on the hair are transferred to the comb. The comb becomes negatively charged and the hair becomes positively charged. The following materials are named in decreasing order of their ability to hold electrons: rubber, silk, glass, flannel, and fur (or hair). If any two of these materials are rubbed together, the material earlier in the list becomes negative, and the material later in the list becomes positive. The materials should be clean and dry.

(iv:
A convex lens curves outward; it has a thick center and thinner edges. Light passing through a convex lens is bent inward, or made to converge;
Concave lens: A diverging, or concave, lens is curved inward, with a thin center and thicker edges. Light passing through a concave lens bends outward, or diverges

(v) Fats and oils: Fats are soft and greasy at ordinary temperatures, whereas fixed oils—as distinct from essential oils and petroleum—are liquid.

(vi) adsorption : the adhesion of a thin layer of molecules of some substance to the surface of a solid or liquid.
Absorption: the ability of a substance to absorb light, noise, or energy, or the fact that it does so


13. Which part of a plant do they belong to?
(i) Ginger........................underground Stem
(ii) Raddish.....................edible Root
(iii) Potato.....................root
(iv) Cinnamon.................Bark of stem

(v) Peanut.....................underground Seed
(vi) Saffron...................Stigma of Flower
(vii) Almond...................Fruit
(viii) Chillies....................edible pod with seeds
(ix) Spinach...................leaves
(x) Tomato ...................fruit

15. Fill in the blanks.

(i) In a heat engine, heat energy is changed into _________ (mechanical energy, magnetic energy, light energy)
(ii) Frequency of audible sound in Hertz (Hz) is _________ (20 – 20,000Hz, 20,000 – 30,000Hz, 30,000 – 4,000Hz)
(iii) Deficiency of vitamin B causes _________ (rickets, beriberi, night blindness)
(iv) Cheapest source of producing electricity is _________ (coal, natural gas, water)
(v) The smallest unit of measurement of wavelength is _________ (micrometer, angstrom, nanometer)
(vi) The chemical generally used in refrigerators is _________ (ethylene glycol,freon, methyl alcohol)
(vii) The unit of ‘TON’ to specify air conditioners is equal to _________ (10,000 BTU/hour, 12,000 BTU/hour, 16,000 BTU/hour)
(viii) Unit of electricity ‘KILOWATT HOUR’ is the unit of (force, work, power)
(ix) Period of famous Muslim scientists is _________ (3rd – 5th century, 6th – 7th century, 7th – 13th century A.D.)
(x) Heat radiation travels at a speed equal to _________ (half the speed of light, speed of light, speed of wind)

All members are requested to take part in these exercises wholeheartedly.
I always put my answers after a thorough research, but man is born to err, therefore if any mistake occures than plz correct me.
Thanks


------------------------------------

EVERYDAY SCIENCE PAPER 1995

Note: Attempt TEN questions. All questions carry equal marks. Draw diagrams where necessary. Negative marking would be done for incorrect answers in Question Nos. 1 and 14.

1. Which of the following statements are true and which are false.
a) Cryptograms are non-flowering plants.
b) Reserve food material is usually stored as glycogen in plants.
c) Streptococcus is a gram negative bacteria
d) Spinach is a good source of vitamin K.
e) Insulin is a hormone secreted by the spleen.
f) Femur is a bone of the forearm.
g) The moon has no atmosphere.
h) Excessive burning of fossil fuels cause acid rain.
i) Twenty-first of June is the longest day of the year in the northern hemisphere.
j) Electricity is a secondary source of energy.

2. Define any FIVE of the following scientific terms.
a) Doping
b) Immunization
c) Pasteurization
d) Modulation
e) Catabolism
f) Reprocessing of reactor fuel.

3. What do you understand by the term “deforestation”? Discuss its ill-effects on the mankind.

4. Fill in the blanks.
a) The largest planet of the solar system is _________.
b) The outermost layer of the earth is called _________.
c) Newton is the unit of _________.
d) Radium was discovered by _________.
e) The memory of the computer is expressed in _________.
f) Quartz is a crystalline form of _________.
g) AIDS is caused by _________.
h) Chemical name of gypsum is _________.
i) Molten super hot material present inside a volcano is called _________.
j) Richter scale measures the severity of _________.

5. What is composition of blood? Describe six main functions of blood.

6. Write short notes (not more than 150 words) on any two of the following.
a) Semi-conductors
b) Pesticides
c) Laser.


regards
Atif Rana

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