How long does the light from sun take to reach us?
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Why cell phones radiate heat while talking a long time ?
What is Kinetic Energy ?
Explain what instrument is used to measure volume?
What is the avarege speed of people fencing like at the olympic games. (sorry for the misspelled words)
Explain what is the transparent?
Explain the difference between a lens and a mirror?
Explain the Archimedes’s Principle ?
when does one exert greater pressure on ground during walking or standing? why ? what happends to the period of a simple pendulum taken into a deep mine
How is A.C. converted into D.C ?
State the laws of thermodynamics.
Examine the working of the Refrigerator?
What is Lunar module?