10 kilogram ball falls from a height of 5 meters and rebounds from the floor to a height of 3 meters. The energy lost by the ball is:

Q-1; A 10 kilogram ball falls from a height of 5 meters and rebounds from the floor to a height of 3 meters. The energy lost by the ball is:

1) 20 joules
2) 98 joules
3) 196 joules
4) 294 joules
ANSWER: 3 -- 196 JOULES

Q-2; What is the Celsius temperature corresponding to 100 degrees Kelvin?

ANSWER: -173 DEGREES CELSIUS

Q-3; A rise in temperature of 20 Kelvin degrees is equal to a rise of:

1) 20 degrees Celsius
2) 36 degrees Celsius
3) 68 degrees Celsius
4) 293 degrees Celsius
ANSWER: 1 -- 20 DEGREES CELSIUS

Q-4; A kilocalorie is equal to one of the following. Is it equal to:

1) 4.2 Joules
2) 1000 Joules
3) 4200 Joules
4) 10,000 Joules
ANSWER: 3 -- 4200 JOULES

Q-5;An increase in the motion of the molecules of a gas confined in a steel tank will be observed in one of the following ways. Will it be observed as an increase in:

1) the temperature of the gas only
2) the pressure of the gas only
3) both the temperature and pressure of the gas
4) the temperature of the gas and a decrease in its pressure
ANSWER: Y -- BOTH THE TEMPERATURE AND PRESSURE OF THE GAS

Q-6; Under which of the following conditions does the behavior of a real gas resemble that of an ideal gas? Is it:

1) under all conditions of temperature and pressure
2) only at very high pressure
3) only when the gas is near condensation
3) only at low densities when the molecules are relatively far apart
ANSWER: 4 -- ONLY AT LOW DENSITIES WHEN THE MOLECULES ARE
RELATIVELY FAR APART

Q-7; Two waves of equal wavelength will interfere destructively most effectively under one of the following conditions. Will the interference be most effective when the waves are:

1) in phase and have equal amplitudes
2) in phase and have unequal amplitudes
3) 180 degrees out of phase and have equal amplitudes
4) 180 degress out of phase and have unequal amplitudes
ANSWER: Y -- 180 DEGREES OUT OF PHASE AND HAVE EQUAL AMPLITUDES

Q-8; As the temperature of the air increases from 0 degrees C to 20 degrees C, the wavelength of a sound made by a tuning fork of fixed frequency does which of the following? Does the wavelength

1) increase
2) decrease
3) remain the same
4) increase up to a maximum, then remain constant
ANSWER: 1 -- INCREASE