
Hewitt 35 hw review
Authored by Michelle Tseng
Physics
9th Grade - University
Used 2+ times

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42 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The famous Michelson-Morley interferometer experiment showed that the speed of light was
of the same value in any state of relative motion
greater if a light source approached an observer
greater if an observer moved toward a light source
less if an observer moved toward a light source
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
If you walk at 1 km/h down the aisle toward the front of a train that moves at 60 km/h, what is your speed relative to the ground?
61 km/h
59 km/h
60 km/h
1 km/h
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
You walk at 1 km/h down the aisle of a trane moving at 60 km/h. Compare your speed relative to the ground vs your speed relative to the Sun. Are they slightly different or very different?
Slightly! Relative to the Sun, it is nearly 110 km/hr.
Slightly! Relative to the Sun, it is nearly 1600 km/hr.
It is not different at all.
A lot! Relative to the Sun, it is nearly 110,000 km/hr.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What hypothesis did G. F. FitzGerald make to explain the findings of Michelson and Morley?
The speed of light in a vacuum was a constant in all frames of reference.
The length of the material in the experiment contracted perpendicular to the direction of motion.
The length of the material in the experiment contracted in the direction of motion.
The time of travel of the light beam lengthened for the light moving in the direction of travel.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What classical idea about space and time did Einstein reject?
Einstein rejected the idea that time is influenced by gravity.
Einstein rejected the idea that the speed of light in a vacuum is the same in all reference frames.
Einstein rejected the idea that space and time are coupled.
Einstein rejected the idea that space and time are independent.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The speed of light in free space is
the same only in a uniformly moving frame of reference
a constant if no acceleration is involved
a constant
variable with motion of the source or receiver
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the same in Einstein's first postulate?
The acceleration of gravity
The speed of light in the ether
All laws of nature in all uniformly moving frames of reference
The speed of time
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