{[['
']]}
']]}
121: A machine having an efficiency of 50% does 500 joules of work. Which of the following is the work input? Is it:
w) 500 joules
x) 250 joules
y) 1000 joules
z) 2500 joules
ANSWER: Y -- 1000 JOULES
122: The relationship between kinetic energy and the potential energy of a swinging pendulum bob is one of the following. Is it:
w) kinetic energy is greater than potential energy
x) kinetic energy is less than potential energy
y) kinetic energy is equal to potential energy
z) kinetic energy plus potential energy equals a constant
ANSWER: Z -- KINETIC ENERGY PLUS POTENTIAL ENERGY EQUALS A CONSTANT
123: 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:
w) 20 joules
x) 98 joules
y) 196 joules
z) 294 joules
ANSWER: Y -- 196 JOULES
124: What is the Celsius temperature corresponding to 100 degrees Kelvin?
ANSWER: -173 DEGREES CELSIUS
125: A kilocalorie is equal to one of the following. Is it equal to:
w) 4.2 Joules
x) 1000 Joules
y) 4200 Joules
z) 10,000 Joules
ANSWER: Y -- 4200 JOULES
126: 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:
w) the temperature of the gas only
x) the pressure of the gas only
y) both the temperature and pressure of the gas
z) the temperature of the gas and a decrease in its pressure
ANSWER: Y -- BOTH THE TEMPERATURE AND PRESSURE OF THE GAS
127: According to the kinetic theory, the Kelvin temperature of an ideal gas is proportional to which one of the following. Is the temperature proportional to the gas's average molecular:
w) velocity
x) momentum
y) kinetic energy
z) potential energy
ANSWER: Y -- KINETIC ENERGY
128: Under which of the following conditions does the behavior of a realgas resemble that of an ideal gas? Is it:
w) under all conditions of temperature and pressure
x) only at very high pressure
y) only when the gas is near condensation
z) only at low densities when the molecules are relatively far apart
ANSWER: Z -- ONLY AT LOW DENSITIES WHEN THE MOLECULES ARE
RELATIVELY FAR APART
129: 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:
w) in phase and have equal amplitudes
x) in phase and have unequal amplitudes
y) 180 degrees out of phase and have equal amplitudes
z) 180 degress out of phase and have unequal amplitudes
ANSWER: Y -- 180 DEGREES OUT OF PHASE AND HAVE EQUAL AMPLITUDES
130: 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
w) increase
x) decrease
y) remain the same
z) increase up to a maximum, then remain constant
ANSWER: W -- INCREASE Science Bowl PHYSICS
Post a Comment