User g s

84 votes

How does light from distant galaxies reach us?

answered Sep 23, 2021 at 22:07

68 votes

Why doesn't energy exhaust itself?

answered Jun 25, 2021 at 17:15

47 votes

Does gravitation really exist at the particle level?

answered May 21, 2022 at 2:27

31 votes

Accepted

If I'm in outer space, and suddenly start accelerating, will I feel it?

answered Jul 23, 2021 at 18:14

30 votes

If I wanted to slow down someone's aging by a factor of 100, could I put them on a sufficiently fast Ferris wheel?

answered Aug 21, 2022 at 4:54

29 votes

Why does running spend more energy than walking?

answered Jul 4, 2021 at 23:29

28 votes

Accepted

Why is the second law of thermodynamics not symmetric with respect to time reversal?

answered Oct 3, 2021 at 2:21

28 votes

What technology is needed for an individual to reproduce the current SI meter and kilogram from scratch?

answered Apr 1, 2022 at 0:41

24 votes

Can spinning arms really help you balance on the edge of a cliff?

answered Dec 31, 2022 at 21:53

23 votes

At which slope angle is a runner faster than a bicyclist?

answered Jan 13, 2022 at 2:36

21 votes

Can particles be in a superposition of times as well as positions?

answered Sep 8, 2021 at 23:21

21 votes

Microwave inside-out cooking true/false

answered Feb 21, 2022 at 4:58

20 votes

Accepted

Why is the center of a torch beam visible even through an opaque body like my finger?

answered Mar 7, 2021 at 4:43

19 votes

Accepted

Why does the Earth's magnetic field have an angle of 11.5°?

answered Aug 14 at 4:28

19 votes

Why does a chimney sometimes create a "draft"?

answered Dec 28, 2022 at 5:02

19 votes

Can the value of friction force ever exceed value of applied force?

answered Jun 17, 2022 at 16:28

18 votes

Is my angular momentum equal to that of the Earth?

answered Jun 17, 2021 at 21:56

18 votes

Is submersion in a canal a good way to shelter from a nuclear strike?

answered Feb 27, 2022 at 18:55

13 votes

How do we measure time?

answered Nov 3, 2021 at 23:09

13 votes

Does Newtonian mechanics work in polar coordinates?

answered Dec 23, 2021 at 21:30

9 votes

Why do we say that gravity did work on an object to give it velocity, when it already had that energy as a potential?

answered Dec 27, 2022 at 2:39

9 votes

Does work done by a non-conservative force involve distance rather than displacement?

answered Feb 2 at 21:04

8 votes

What happens when a laser beam is stuck between two mirrors and the distance in-between is decreased gradually? Heisenberg Uncertainty Principle

answered Sep 13, 2021 at 17:11

8 votes

Why light can't escape a black hole but can escape a star with same mass?

answered Jan 31 at 19:29

7 votes

Accepted

Entropy of the earth decreased since pre-biological times?

answered Nov 7, 2021 at 5:45

7 votes

Accepted

Question about time dilation and what an observer sees

answered Nov 22, 2021 at 14:58

7 votes

Why does the focus point of the eye does not burn the retina?

answered Mar 26 at 19:00

7 votes

If gravity is not a force, then how come gravitational assists work?

answered Jan 8 at 20:11

6 votes

What if cameras get better than our eyes?

answered Oct 28, 2021 at 19:09

6 votes

Accepted

Is red-shifting the only proof for the expansion of the universe?

answered Sep 22, 2021 at 22:32

Stack Exchange Network

376 Answers

How does light from distant galaxies reach us?

Why doesn't energy exhaust itself?

Does gravitation really exist at the particle level?

If I'm in outer space, and suddenly start accelerating, will I feel it?

If I wanted to slow down someone's aging by a factor of 100, could I put them on a sufficiently fast Ferris wheel?

Why does running spend more energy than walking?

Why is the second law of thermodynamics not symmetric with respect to time reversal?

What technology is needed for an individual to reproduce the current SI meter and kilogram from scratch?

Can spinning arms really help you balance on the edge of a cliff?

At which slope angle is a runner faster than a bicyclist?

Can particles be in a superposition of times as well as positions?

Microwave inside-out cooking true/false

Why is the center of a torch beam visible even through an opaque body like my finger?

Why does the Earth's magnetic field have an angle of 11.5°?

Why does a chimney sometimes create a "draft"?

Can the value of friction force ever exceed value of applied force?

Is my angular momentum equal to that of the Earth?

Is submersion in a canal a good way to shelter from a nuclear strike?

How do we measure time?

Does Newtonian mechanics work in polar coordinates?

Why do we say that gravity did work on an object to give it velocity, when it already had that energy as a potential?

Does work done by a non-conservative force involve distance rather than displacement?

What happens when a laser beam is stuck between two mirrors and the distance in-between is decreased gradually? Heisenberg Uncertainty Principle

Why light can't escape a black hole but can escape a star with same mass?

Entropy of the earth decreased since pre-biological times?

Question about time dilation and what an observer sees

Why does the focus point of the eye does not burn the retina?

If gravity is not a force, then how come gravitational assists work?

What if cameras get better than our eyes?

Is red-shifting the only proof for the expansion of the universe?