User RC_23

42 votes

Why does a fluid push upward on a body fully or partially submerged in it?

answered Oct 2, 2021 at 21:27

34 votes

Accepted

Why is Spacetime described as flat even though we live in 3 dimensions of space?

answered Aug 23, 2023 at 22:42

34 votes

Why is the First Law of Motion a physical law?

answered Oct 23 at 2:25

28 votes

Accepted

Wouldn't the cosmic background radiation (CMB) produce drag and thus create a preferential inertial frame?

answered May 7, 2022 at 21:47

24 votes

How can negative potential energy cause mass decrease?

answered Jun 28, 2023 at 0:33

21 votes

Accepted

Is this a proof for energy conservation?

answered Sep 28 at 22:45

21 votes

What does the sky look like from the moon?

answered Aug 31, 2023 at 3:31

14 votes

What counts as the Earth's mass? At which point would it increase or decrease?

answered Sep 1 at 4:04

14 votes

Is Brownian motion truly random?

answered Apr 30, 2023 at 16:44

14 votes

What exactly makes a black hole STAY a black hole?

answered Nov 2, 2022 at 4:29

13 votes

Why aren't hydraulic pumps included in the list of simple machines?

answered Nov 13 at 14:43

12 votes

How can micro black holes exist?

answered Jan 1 at 5:26

12 votes

Accepted

Einstein Field Equations Derivation

answered Jan 16, 2023 at 1:53

12 votes

Why don't the first two laws of thermodynamics contradict each other?

answered Jul 13, 2023 at 1:54

11 votes

How can time be curved?

answered Sep 16, 2021 at 2:50

11 votes

Fusion September 2024: Where are we with respect to "engineering break even"?

answered Sep 5 at 3:48

10 votes

How different is a 99.5% eclipse from a total eclipse?

answered Mar 20 at 3:01

10 votes

Accepted

During fusion, how does mass turn into energy?

answered Nov 24, 2023 at 19:55

10 votes

Why are only infrared rays classified as "heat rays"?

answered Sep 14, 2021 at 15:58

9 votes

Why is relativity of simultaneity so special?

answered May 9, 2023 at 4:19

9 votes

Mass per nucleon graph

answered Jan 9, 2023 at 18:48

8 votes

Have rocket float into upper atmosphere via balloon

answered Jan 16, 2023 at 21:43

8 votes

Does the mass variable $M$ in the Schwarzschild radius equation $R = 2GM/c^2$ refer to rest mass or relativistic mass?

answered Oct 14, 2022 at 3:31

8 votes

Speed of Light and Time

answered Jul 16, 2023 at 21:46

8 votes

Accepted

Is integration physical, but differentiation is not?

answered Aug 29 at 17:10

7 votes

How do antennas catch the correct radio signal in the air?

answered Nov 16 at 17:48

7 votes

Does the Earth experience air resistance?

answered Jun 5, 2023 at 4:07

7 votes

Spectroscopy: Yellow vs Magenta

answered May 16, 2023 at 14:30

6 votes

Test for inertial frame of reference

answered Jun 4, 2023 at 5:51

6 votes

Accepted

Understanding the use of $d$ and $\partial$ in thermodynamics

answered Sep 19, 2022 at 1:22

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401 Answers

Why does a fluid push upward on a body fully or partially submerged in it?

Why is Spacetime described as flat even though we live in 3 dimensions of space?

Why is the First Law of Motion a physical law?

Wouldn't the cosmic background radiation (CMB) produce drag and thus create a preferential inertial frame?

How can negative potential energy cause mass decrease?

Is this a proof for energy conservation?

What does the sky look like from the moon?

What counts as the Earth's mass? At which point would it increase or decrease?

Is Brownian motion truly random?

What exactly makes a black hole STAY a black hole?

Why aren't hydraulic pumps included in the list of simple machines?

How can micro black holes exist?

Einstein Field Equations Derivation

Why don't the first two laws of thermodynamics contradict each other?

How can time be curved?

Fusion September 2024: Where are we with respect to "engineering break even"?

How different is a 99.5% eclipse from a total eclipse?

During fusion, how does mass turn into energy?

Why are only infrared rays classified as "heat rays"?

Why is relativity of simultaneity so special?

Mass per nucleon graph

Have rocket float into upper atmosphere via balloon

Does the mass variable $M$ in the Schwarzschild radius equation $R = 2GM/c^2$ refer to rest mass or relativistic mass?

Speed of Light and Time

Is integration physical, but differentiation is not?

How do antennas catch the correct radio signal in the air?

Does the Earth experience air resistance?

Spectroscopy: Yellow vs Magenta

Test for inertial frame of reference

Understanding the use of $d$ and $\partial$ in thermodynamics