WorksheetsBlack Holes Review
Total questions: 15
Worksheet time: 8mins
________ is the idea that the laws of mechanics are the same in steadily moving reference frames as they are in resting reference frames.
Galilean relativity
Anisotropy
The Anthropic Principle
The Copernican Revolution
Suppose you are riding a skateboard at 3 m/s to the right and you throw a ball at 2.5 m/s to the left (relative to you). What is the speed of the ball relative to the ground?
0.5 m/s
1.0 m/s
1.5 m/s
2.0 m/s
All speeds are relative, except for the speed of _________ which is absolute.
sound
light
the Sun
the Earth
Represented by the letter c, this is the speed limit of the universe, written out as a number.
6.67x10-11 m3/kgs2
3x108 m/s
1240 eVnm
3.14159...
On a ______ surface, the shortest distance between two points is a straight line.
flat
curved
Who described gravity as a consequence of the curvature of spacetime?
Newton
Einstein
What are the four dimensions of spacetime?
x
y
z
t
A ________ is a region of spacetime from which nothing can escape (not even light).
black hole
red dwarf
supergiant
magnetar
Which of the following events can result in the formation of a black hole?
The death of a star like the Sun.
The collapsing core of a high mass star.
A white dwarf cooling down over time.
What might happen as you fall into a black hole?
Spaghettification
You can't escape
Your time appears to slow down (outside perspective)
Your light becomes redshifted (outside perspective)
Your future is now a point in space (the singularity)
The distance between the center of a black hole and its event horizon is called the...
Schwarzschild radius.
Newton circumference.
Einstein tangent.
Dirac bisector.
What is the escape velocity at the event horizon of a black hole?
the speed of light
7 miles per second
343 m/s
it depends on the mass of the black hole
A difference in distances measured by observers moving at different speeds relative to each other.
thought experiments
relativity of simultaneity
time dilation
length contraction
A difference in time intervals measured by observers moving at different speeds relative to each other.
thought experiments
relativity of simultaneity
time dilation
length contraction
Fettucini, rotini, manicotti, ziti, are types of pasta. ________ is the italian-cuisine-inspired name given to the extreme deformation caused by tidal forces near the singularity.
tortellinification
spaghettification
lasagnafication
carbonarafication
