The rest mass of an electron is ______

the smallest mass it can possibly be

Which of the following is true of proper time?

it's measured by an observer at rest w/respect to 2 events

Which of the following would be considered a non-inertial reference frame?

An airplane banking, following a curved path, A volleyball that is in freefall toward Earth

The speed of light...

is the same for all observers, regardless of their motion

The center of the Milky Way is 26,000 light years from Earth. Can a human ever get there?

yes, traveling close to the speed of light it's possible

Which of the following is FALSE?

In a vacuum, c varies slightly based on light frequency

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Special Relativity Review - everything

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Review of our final unit - special relativity!

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Questions 12

Answers

1
The alien ship flies horizontally at 0.5c. From Tom Brady's perspective, the ship will be:
the same height, but wider
shorter and thinner
shorter and wider
the same height, but thinner
2
The rest mass of an electron is ______
the smallest mass it can possibly be
depends on the type of electron
the largest mass it can possibly be
3
Which of the following is true of proper time?
it's measured by an observer at rest w/respect to 2 events
it is measured for an object at rest
it is always larger than dilated time
it's measured by an observer moving w/respect to 2 events
4
From the perspective of the aliens, how will they see Tom Brady?
moving in fast motion
moving in slow motion
moving at a normal rate
as a hero
5
Which of the following would be considered a non-inertial reference frame?
A cat running down the stairs at constant speed
An airplane banking, following a curved path
A volleyball that is in freefall toward Earth
A man standing on a chair
6
Satellites travel at a very high speed, so we (on Earth) measure satellite clocks to run:
backwards
fast
normal... (by now you know it's not this one)
slow
7
How fast must a spaceship travel if it is to become 30% as long as its rest length?
0.95c
0.30c
0.91c
0.84c
8
An alien ship flies over a stadium at 0.5c. How long do they measure the 100 yd long field as?
50 yards
86.6 yards
100 yards
115.5 yards
9
The speed of light...
is the same for all observers, regardless of their motion
will be slower with respect to fast moving objects
is slowest through the vacuum of space
depends on how fast the observer is moving
10
The center of the Milky Way is 26,000 light years from Earth. Can a human ever get there?
yes, traveling close to the speed of light it's possible
Even with time dilation, it's not possible within 1 lifetime
yes, traveling just slightly faster than the speed of light
No, they'd need to travel at light speed,which is impossible
11
As an object increases its speed, its mass:
always increases
remains the same
always decreases
may increase or decrease
12
Which of the following is FALSE?
every inertial reference frame is equally valid
The laws of physics are the same in a=0 reference frames
In a vacuum, c varies slightly based on light frequency
The speed of light is the same for all observers

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