
UCR PHYS 007 Midterm Practice
Authored by Valerie Rivera
Physics
University
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51 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The person who first determined planets move in elliptical orbits was
Kepler
Copernicus
Aristarchus
Galileo
Anaximander
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Newton's laws of motion are valid
Only in an inertial rest frame for speeds much less than C
Only in an inertial rest frame but for all speeds, even those near C
In all frames, accelerating or not
Only for objects near the surface of the Earth
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The first measurement of the speed of light was performed by
Ole Roemer, using observed variations in the orbital period of Jupiter's moon LO
Ole Roemer and an assistant, using lantern light from separate hilltops
Galileo, using a rotating mirror reflecting light back-and-forth to a stationary mirror
Foucault, using a rotating mirror reflecting light back-and-forth to a stationary mirror
Galileo and an assistant, using light from separate hilltops
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of the following is correct concerning an electromagnetic wave?
The electric fields point perpendicularly to each other and to the direction of propagation of the wave
The electric magnetic fields both point parallel to the direction of propagation of the wave
The electric and magnetic fields point in the same direction as each other, which is perpendicular to the direction of propagation of the wave
The electric and magnetic fields both point opposite to the direction of propagation of the wave
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
By the gravitational mass of an object, we mean the quantity that
Tells you how heavy an object is
Tells you how difficult it is to get an object moving
Explains why objects in free-fall fall at the same rate "g"
Explains why an object at rest will stay at rest unless acted upon by a force
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Einstein's theory of special relativity is valid
only in inertial reference frames
only for speeds much less than the speed of light
only for speeds near the speed of light
only in accelerating reference frames
only in small gravitational fields
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
How far away is Proxima Centauri, the nearest star?
4 light years
46 billion light years
14 billion light years
2.5 million light years
20 billion light years
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