Physics Final Review Question Preview (ID: 47203)
Final Exam.
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Which of the following is a physical quantity that has a magnitude but not direction?
a) Vector
b) Scalar
c)
d)
The highness or lowness of a sound is perceived as
a) Compression
b) Wavelength
c) Ultrasound
d) Pitch
Energy transferred as heat occurs between two bodies in thermal contact when they differ in which of the following properties?
a) Mass
b) Specific heat
c) Density
d) Temperature
Which of the following is the cause of an acceleration?
a) Speed
b) Inertia
c) Force
d) Velocity
An attracting force occurs between two charged objects when the charges are of
a) Unlike signs
b) Like signs
c) Equal magnitude
d) Unequal magnitude
Which of the following energy forms is associated with an object due to its position?
a) Potential energy
b) Positional energy
c) Total energy
d) Kinetic energy
Which of the following has teh greates power output?
a) A weightlifter who lifts a 250 N weight 2.1 m in 3.0 s.
b) A mechanic's lift that raises a 12,000 N car 2.1 m in 12 s.
c) A car engine that does 1200 J of work in 5 s
d) A crane that lifts a 25, 000 N beam at a speed of 1.2 m/s
What is the speed of an object at rest?
a) 0 m/s
b) 1 m/s
c) 9.8 m/s
d) 9.81 m/s
Which of the following is a devie designed to open an overloaded circuit and prevent overheating
a) Circuit breaker
b) magnet
c) resistor
d) transformer
If two small beakers of water, one at 70 degrees C and one at 80 degrees C, are emptied into a large beaker, what is the final temperature of the water?
a) less than 70 degrees C
b) more than 80 degrees C
c) between 70 and 80 degrees C
d) It will fluctuate
The perceived loudness of a sound is measured in
a) Hertz
b) Decibels
c) Watts
d) Watts/sq. meter
What is the kinetic energy of a 0.135 kg baseball thrown at 40 m/s?
a) 54 J
b) 87 J
c) 108 J
d) 216 J
A net force of 6.8 N accelerates a 31 kg scooter across a level parking lot. What is the magnitude of the scooter's acceleration?
a) 0.22 m/s/s
b) 0.69 m/s/s
c) 3.2 m/s/s
d) 4.6 m/s/s
Which statement about the acceleration of an object is correct?
a) Directly proportional to the net force and inversely proportional to the mass
b) Directly proportiaonl to the force and also the mass
c) Inversely proportional to the force and the also the mass
d) Inversely proportional to the force and directly proportional to the mass
If you are on a train, how will the pitch of the train's whistle sound to you as the train moves?
a) Become higher
b) Become lower
c) Not change
d) Become higher then lower
What is the potential difference across a 5 ohm resistor that carries a current of 5 amps?
a) 100 V
b) 25 V
c) 10 V
d) 1 V
A child moving at constant velocity carries a 2 N ice cream cone 1 M across a level surface. What is the net work done on the ice cream cone?
a) 0 J
b) 0.5 J
c) 2 J
d) 20 J
Which of the following situations represents a negative displacement? (Assume positive position is measured vertically upward on y axis)
a) A cat stands on a tree limb
b) A cat jumps from the ground onto a limb
c) A cat jumps from a lower tree limb to a higher limb
d) A cat jumps from a tree limb to the ground
What is the potential energy of a 1 kg mass 1 m above the ground?
a) 1 J
b) 9.8 J
c) 10 J
d) 96 J
Which of the following has the greatest momentum?
a) A tortoise with a mass of 275 kg moving at a velocity of 0.55 m/s
b) A hare with a mass of 2.7 kg moving at a velocity of 7.5 m/s
c) A turtle with a mass of 91 kg moving at a velocity of 1.4 m/s
d) A roadrunner with a mass of 1.8 kg moving at a velocity of 6.7 m/s
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