An astronaut standing on a platform on the
Moon drops a hammer. If the hammer falls
6.0 meters vertically in 2.7 seconds, what is its
acceleration?
1.6 m/s2
100
Which quantity is a measure of the rate at which
work is done?
Power
100
Which type of wave requires a material medium
through which to travel?
Choices:
radio wave
light wave
microwave
mechanical wave
mechanical wave
100
Which is not a vector quantity?
electric charge
magnetic field strength
velocity
displacement
electric charge
100
If 20 joules of work is used to transfer
20 coulombs of charge through a 20-ohm resistor,
the potential difference across the resistor is...
1 V
200
A child walks 5.0 meters north, then 4.0 meters
east, and finally 2.0 meters south. What is the
magnitude of the resultant displacement of the
child after the entire walk?
5 m
200
A horizontal force of 5.0 newtons acts on a
3.0-kilogram mass over a distance of 6.0 meters
along a horizontal, frictionless surface. What is
the change in kinetic energy of the mass during
its movement over the 6.0-meter distance?
30 J
200
Compared to the speed of a sound wave in air,
the speed of a radio wave in air is...
less
greater
the same
greater
200
As a car is driven south in a straight line with decreasing speed, the acceleration of the car must be this direction.
northward
200
The current through a 10-ohm resistor is
1.2 amperes. What is the potential difference
across the resistor
12 V
300
A force of 25 newtons east and a force of
25 newtons west act concurrently on a
5.0-kilogram cart. What is the acceleration of
the cart
0 m/s2
300
What is the average power required to raise a 1.81 × 10^4-newton elevator 12.0 meters in 22.5 seconds?
9.65 × 10^3 W
300
When white light is shined into a prism, the colors of the rainbow appear. This property of light is known as...
dispersion
300
Which object has the greatest inertia?
a falling leaf
a softball in flight
a seated high school student
a rising helium-filled toy balloon
a seated high school student
300
The energy produced by the complete conversion of 2.0 × 10^–5 kilogram of mass into energy is...(Think Einstein)
1.8 TJ or
1.8x10^12J
400
A 2.00-kilogram object weighs 19.6 newtons on Earth. If the acceleration due to gravity on Mars is 3.71 meters per second 2, what is the object’s mass on Mars?
2.00 kg
400
If the speed of a moving object is doubled, the
kinetic energy of the object is...
quadrupled
400
If the amplitude of a wave is increased, the
frequency of the wave will...
decrease
increase
remain the same
remain the same
400
Which unit is equivalent to meters per second?
Hz•s
Hz•m
m/Hz
s/Hz
Hz•m
400
In Alpha decay, how many subatomic particles does an atom lose?
Four
500
A baseball dropped from the roof of a tall building takes 3.1 seconds to hit the ground. How tall is the building? [Neglect friction.]
47 m
500
How much work is required to lift a 10.-newton weight from 4.0 meters to 40. meters above the surface of Earth?
3.6 × 10^2 J
500
What is the period of a 60-hertz electromagnetic
wave traveling at 3.0 × 10^8 meters per second
1.7 × 10^–2 s
500
Which characteristic is the same for every color
of light in a vacuum?
Speed
500
A 2.0-ohm resistor and a 4.0-ohm resistor are
connected in series with a 12-volt battery. If the
current through the 2.0-ohm resistor is
2.0 amperes, the current through the 4.0-ohm
resistor is...