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What is the change in temperature of 2.2 kg of the following substances if 8.5 x 103 J of thermal energy is added to each of the substances?
a. ice
b. Water
c. Aluminium
d. Steel
The fraction of vacancy sites in a metal is 1X10 -10 at 500 0 C. What will be the fraction of vacancy sites at double the temperature?
What is the wavelength of electromagnetic waves of frequency 5 x 1019Hz in free space? Give its two applications.
A boy throws a ball vertically upward with a velocity of 6 meters per second. How long does it take the ball to return to the boy's hand? Ans: A boy throws a ball vertically
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Question: Regard as a high school built to handle 1500 students but attended by 2500 students. Between classes the halls are crowded with students moving to their next class. A
Fun with a pendulum Suspend a hard ball about 8 cm in diameter on a cord over a table. The cord should be at least 1.5 m in length and should be just high sufficient off the ta
why it is not possible to charge one object by rubbing without charging another object by rubbing
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Q. Illustrate that soccer balls go faster in the air on a cold or hot day? Answer:- On a hot day the air molecules have additional kinetic energy they move around more fre
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