What did Einstein's theories of relativity change about our understanding of time?
Is Time Travel Impossible?

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Physics, Science
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11th Grade - University
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Hard
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Time travel is impossible under any circumstances.
Time is relative and can be affected by speed and gravity.
Time can be manipulated with enough energy.
Time is an absolute constant.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens to time on a fast-moving spaceship according to special relativity?
Time slows down compared to Earth.
Time speeds up compared to Earth.
Time remains the same as on Earth.
Time stops completely.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a tachyon?
A particle that travels slower than light.
A particle with regular mass.
A particle that travels faster than light.
A particle that cannot exist in our universe.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is required to keep a wormhole stable for time travel?
Regular mass
Negative energy density
Infinite energy
Positive energy density
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the main challenge with using wormholes for time travel?
They are too small to be useful.
They require exotic matter to remain open.
They are easy to create but hard to stabilize.
They only allow travel to the future.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the Tipler cylinder?
A machine that stops time completely.
A method to travel faster than light.
A device that creates wormholes.
A theoretical time machine using a rotating cylinder.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What did Kurt Godel propose regarding time travel?
Time travel is impossible.
Time travel is only possible in black holes.
Time travel requires infinite energy.
A rotating universe could allow time loops.
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