P.E is max at ends and k.E zero while in middle K.E is max and P.E zero. Am i right?

yes you are!but question was not asked in that sense

__________________
"Ability may get you to the top, but it takes character to keep you there."

Soft clay is used to create pottery through the Crafting

aoa to alll ...

innate is non communicable disease

How does the electric force between two charges change when the distance between them is doubled, how does it change when the distance is halved?
- See more at: http://www.chacha.com/question/how-d...nce-is-halved?
It is inversely proportional to the separation distance sq'd. If doubled, the new force is 1/2 sq'd = 1/4 of its original value.

Alpha[edit]
The alpha phase of the release life cycle is the first phase to begin software testing (alpha is the first letter of the Greek alphabet, used as the number 1). In this phase, developers generally test the software using white box techniques. Additional validation is then performed using black box or gray box techniques, by another testing team. Moving to black box testing inside the organization is known as alpha release.[2]
Alpha software can be unstable and could cause crashes or data loss. External availability of alpha software is uncommon in proprietary software. However, open source software, in particular, often have publicly available alpha versions, often distributed as the raw source code of the software. The alpha phase usually ends with a feature freeze, indicating that no more features will be added to the software. At this time, the software is said to be feature complete.
Beta[edit]
Beta, named after the second letter of the Greek alphabet, is the software development phase following alpha. It generally begins when the software is feature complete. Software in the beta phase will generally have many more bugs in it than completed software, as well as speed/performance issues and may still cause crashes or data loss. The focus of beta testing is reducing impacts to users, often incorporating usability testing. The process of delivering a beta version to the users is called beta release and this is typically the first time that the software is available outside of the organization that developed it.
The users of a beta version are called beta testers. They are usually customers or prospective customers of the organization that develops the software, willing to test the software without charge, often receiving the final software free of charge or for a reduced price. Beta version software is often useful for demonstrations and previews within an organization and to prospective customers. Some developers refer to this stage as a preview, prototype, technical preview (TP), or early access. Some software is kept in perpetual beta—where new features and functionality are continually added to the software without establishing a firm "final" release.

i think we perceive things not because of skin but mind. question was about the sense perception

photo voltaic cells use light

soft drink carbon dioxide.
hardness of water is due to sulphates
hardness of hard water is removed by bicorbonate