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The work done by a friction force is:
a) Always positive
b) Always negative
c) Always zero
d) Either positive or negative depending upon the situation.
Ans: The work done by a friction force is always negative.
Assume a new planet was discovered to orbit the Sun with a period 5 times that of Pluto. Using the data, measure the average distance from the Sun for this new planet.
Eddington limit (Sir A. Eddington) The theoretical limit on which the photon pressure would go above the gravitational attraction of light-emitting body. i.e., a body emitting
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Copper is completely miscible with (A) Nickel. (B) Gold. (C) Hydrogen. (D) Lead. Ans: Copper is completely miscible with gold.
how to calculate speed of light? The speed of light in vacuum, normally denoted by symbol c, is a universal physical constant which is very important in various areas of physi
What are different pumping mechanisms in LASERS?
Elastic collision : A collision is known as elastic when kinetic energy is also conserved along with the linear momentum. There is no transformation or loss of kinetic energy in th
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zeener diode definatoin
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