User docscience

31 votes

Accepted

Why don't gas flames radiate much heat directly, but metal objects heated by them do?

thermodynamics thermal-radiation

answered Sep 1, 2016 at 14:16

19 votes

Accepted

How do we stabilise satellites so precisely?

answered Jan 11, 2015 at 21:03

14 votes

If two sound waves that are different frequencies create beats that occur several hundred times per second, can you hear this effect as its own tone?

waves acoustics interference biophysics

answered Oct 6, 2018 at 0:18

11 votes

If ball bouncing looks like a modulated absolute value of a sine wave, then why not model bouncing this way?

newtonian-mechanics kinematics collision projectile models

answered Nov 26, 2017 at 19:55

9 votes

Accepted

Does breathing on your glasses help with cleaning?

optics soft-question everyday-life vision

answered Aug 5, 2017 at 22:42

9 votes

Why doesn't a cigarette lighter generate thrust?

rocket-science combustion

answered Mar 2, 2015 at 15:49

8 votes

Accepted

Why do people only float in certain orientations?

buoyancy

answered Apr 28, 2015 at 0:15

8 votes

Does holding weights allow you to run faster?

newtonian-mechanics angular-momentum rotational-dynamics

answered May 14, 2015 at 2:21

7 votes

Is it possible to build an air compressor with no moving parts?

thermodynamics

answered May 14, 2015 at 20:19

7 votes

What is the simplest possible experiment that proves that there are atoms?

atoms home-experiment

answered Aug 3, 2015 at 19:58

6 votes

Why do objects have resonance at natural frequency?

forces frequency oscillators resonance vibrations

answered Feb 14, 2015 at 18:07

6 votes

How can one derive Schrödinger equation?

quantum-mechanics schroedinger-equation foundations

answered Oct 19, 2014 at 21:54

6 votes

Pressure loss in an infinite pipe

fluid-dynamics friction drag turbulence fluid-statics

answered Jul 25, 2016 at 3:39

5 votes

Why pressure cooker is more effective in cooking than any vessel?

thermodynamics pressure temperature everyday-life food

answered Nov 4, 2016 at 13:16

5 votes

Accepted

Radon or cosmic ray?

experimental-physics home-experiment radioactivity particle-detectors cosmic-rays

answered Mar 2, 2017 at 16:02

5 votes

What is strapdown integration?

kinematics terminology integration

answered Mar 7, 2017 at 21:46

5 votes

Burning vs Melting - when applied to cooking chocolate

thermodynamics states-of-matter combustion

answered Apr 1, 2017 at 0:14

5 votes

Pressure change when closing valve inside a column of water

pressure fluid-statics

answered Dec 4, 2015 at 21:05

5 votes

What makes Jacob's ladder spark to go upwards?

electromagnetism electricity electric-current education plasma-physics

answered Feb 19, 2016 at 15:43

5 votes

Living organisms decrease or increase entropy?

thermodynamics entropy

answered Feb 25, 2016 at 16:05

5 votes

Accepted

Does barometer improve gps position accuracy?

gps

answered Jun 7, 2016 at 13:44

5 votes

Why do we use orthogonal axes?

classical-mechanics vectors coordinate-systems linear-algebra

answered Jun 14, 2016 at 13:54

5 votes

Accepted

Why does water appear still near the shore

waves everyday-life water

answered Nov 4, 2014 at 4:48

5 votes

Is a chain REALLY only as strong as its weakest link

newtonian-mechanics forces

answered Sep 27, 2014 at 2:49

5 votes

Why are angles dimensionless and quantities such as length not?

dimensional-analysis

answered Jul 12, 2015 at 17:30

5 votes

Would a propeller underwater have thrust?

fluid-dynamics

answered Oct 9, 2015 at 19:16

5 votes

Work = Force x Distance vs Displacement

forces vectors work distance displacement

answered May 18, 2015 at 13:40

5 votes

Why is it impossible to build an air filter that lowers the average velocity of the air molecules in a house?

thermodynamics

answered Apr 29, 2015 at 19:13

4 votes

Why does an imploding tank car implode so quickly?

pressure material-science vacuum estimation

answered Apr 5, 2017 at 15:22

4 votes

Why does the armature of a AC and DC generater rotate?

electromagnetism electricity electric-circuits

answered Apr 16, 2017 at 21:53

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350 Answers

Why don't gas flames radiate much heat directly, but metal objects heated by them do?

How do we stabilise satellites so precisely?

If two sound waves that are different frequencies create beats that occur several hundred times per second, can you hear this effect as its own tone?

If ball bouncing looks like a modulated absolute value of a sine wave, then why not model bouncing this way?

Does breathing on your glasses help with cleaning?

Why doesn't a cigarette lighter generate thrust?

Why do people only float in certain orientations?

Does holding weights allow you to run faster?

Is it possible to build an air compressor with no moving parts?

What is the simplest possible experiment that proves that there are atoms?

Why do objects have resonance at natural frequency?

How can one derive Schrödinger equation?

Pressure loss in an infinite pipe

Why pressure cooker is more effective in cooking than any vessel?

Radon or cosmic ray?

What is strapdown integration?

Burning vs Melting - when applied to cooking chocolate

Pressure change when closing valve inside a column of water

What makes Jacob's ladder spark to go upwards?

Living organisms decrease or increase entropy?

Does barometer improve gps position accuracy?

Why do we use orthogonal axes?

Why does water appear still near the shore

Is a chain REALLY only as strong as its weakest link

Why are angles dimensionless and quantities such as length not?

Would a propeller underwater have thrust?

Work = Force x Distance vs Displacement

Why is it impossible to build an air filter that lowers the average velocity of the air molecules in a house?

Why does an imploding tank car implode so quickly?

Why does the armature of a AC and DC generater rotate?