User Gert

104 votes

Accepted

How are water vapors not visible?

answered Jan 8, 2017 at 19:54

67 votes

Accepted

Why does wet hair keep its shape when it dries?

everyday-life wetting

answered Jun 25, 2016 at 23:51

66 votes

Accepted

Gas pipes - why does gas burn "outwards?"

everyday-life gas

answered Sep 8, 2019 at 17:38

66 votes

Why does pressure in a thermos increase after shaking up hot water and soap?

thermodynamics pressure temperature everyday-life water

answered Feb 25, 2021 at 16:19

48 votes

Accepted

Why does a ping pong ball bounce higher when it is dropped together with a cup of water?

newtonian-mechanics energy-conservation collision home-experiment

answered Jun 28, 2020 at 4:20

45 votes

How did my candle wax crawl up the sides of the jar?

thermodynamics temperature everyday-life

answered May 18, 2016 at 22:00

44 votes

Accepted

How does defrosting your freezer save energy?

thermodynamics temperature everyday-life freezing

answered Aug 18, 2016 at 20:26

39 votes

Accepted

Why is mist gray but water clear?

optics visible-light everyday-life water scattering

answered Feb 21, 2021 at 20:01

34 votes

Accepted

Why doesn't a spinning object in the air fall?

homework-and-exercises newtonian-mechanics forces centripetal-force

answered Nov 5, 2015 at 0:08

31 votes

Accepted

Why does water feel cooler than air?

thermodynamics temperature water thermal-conductivity evaporation

answered Apr 1, 2016 at 14:32

31 votes

Do nuclei emit photons?

electromagnetic-radiation photons nuclear-physics radiation gamma-rays

answered Jul 15, 2020 at 14:26

27 votes

Will something accelerate forever if a constant force is applied to it on a frictionless surface? If so how?

acceleration

answered Oct 10, 2016 at 17:21

26 votes

What keeps the cookie in my coffee from moving when I rotate the cup?

newtonian-mechanics fluid-dynamics angular-momentum rotational-dynamics conservation-laws

answered Dec 8, 2020 at 20:52

25 votes

Accepted

Does fluid speed affect liquid cooling?

thermodynamics fluid-dynamics dissipation

answered Jul 25, 2016 at 20:25

25 votes

Accepted

How is it possible that combustion of coal releases similar energy as TNT explosion while intuitively we would not expect that?

energy

answered Aug 31, 2020 at 19:45

23 votes

Accepted

The process of burning and increasing weight

experimental-physics everyday-life physical-chemistry home-experiment combustion

answered Mar 20, 2021 at 20:51

22 votes

Accepted

How can fast moving particles gain energy from slow moving ones?

fluid-dynamics statistical-mechanics pressure molecular-dynamics

answered Sep 13, 2015 at 17:39

21 votes

Why is the simple harmonic motion idealization inaccurate?

newtonian-mechanics harmonic-oscillator anharmonic-oscillators

answered May 29, 2016 at 14:57

21 votes

What will happen to a ball kept on a frictionless inclined plane?

newtonian-mechanics rotational-dynamics friction

answered Nov 21, 2019 at 13:21

19 votes

Why not dilute radioactive waste?

particle-physics nuclear-physics radioactivity

answered Nov 6, 2015 at 21:38

18 votes

Accepted

Shape of water in rotating bucket

classical-mechanics reference-frames potential centrifugal-force

answered Nov 16, 2016 at 23:47

18 votes

Is there experimental verification of the s, p, d, f orbital shapes?

quantum-mechanics electrons atomic-physics quantum-chemistry orbitals

answered Aug 13, 2015 at 13:55

18 votes

Accepted

What is more efficient in carrying energy: Longitudinal waves or transverse waves?

energy waves

answered Jul 1, 2020 at 5:24

16 votes

Why are the harmonics of a piano tone not multiples of the base frequency?

waves acoustics string

answered Jul 18, 2016 at 18:46

16 votes

Why does a metal block make a shrill sound but not a wooden block upon hammering?

solid-state-physics acoustics everyday-life elasticity vibrations

answered Mar 1, 2019 at 15:34

16 votes

In a microwave oven, why do smaller portions heat up faster?

thermodynamics electromagnetic-radiation everyday-life microwaves

answered Feb 8, 2021 at 22:52

16 votes

Why does canola oil heat up in the microwave?

thermodynamics thermal-radiation microwaves

answered Jul 2, 2021 at 23:56

15 votes

How does the center of mass move forward on a rocking chair?

newtonian-mechanics everyday-life

answered Dec 17, 2020 at 12:14

14 votes

Accepted

What happens to the units when squaring a variable?

units dimensional-analysis

answered Aug 26, 2015 at 17:19

13 votes

Burning Fuels and Producing Water

thermodynamics water phase-transition physical-chemistry condensation

answered Nov 28, 2017 at 17:31

Stack Exchange Network

current community

your communities

more stack exchange communities

1,102 Answers

How are water vapors not visible?

Why does wet hair keep its shape when it dries?

Gas pipes - why does gas burn "outwards?"

Why does pressure in a thermos increase after shaking up hot water and soap?

Why does a ping pong ball bounce higher when it is dropped together with a cup of water?

How did my candle wax crawl up the sides of the jar?

How does defrosting your freezer save energy?

Why is mist gray but water clear?

Why doesn't a spinning object in the air fall?

Why does water feel cooler than air?

Do nuclei emit photons?

Will something accelerate forever if a constant force is applied to it on a frictionless surface? If so how?

What keeps the cookie in my coffee from moving when I rotate the cup?

Does fluid speed affect liquid cooling?

How is it possible that combustion of coal releases similar energy as TNT explosion while intuitively we would not expect that?

The process of burning and increasing weight

How can fast moving particles gain energy from slow moving ones?

Why is the simple harmonic motion idealization inaccurate?

What will happen to a ball kept on a frictionless inclined plane?

Why not dilute radioactive waste?

Shape of water in rotating bucket

Is there experimental verification of the s, p, d, f orbital shapes?

What is more efficient in carrying energy: Longitudinal waves or transverse waves?

Why are the harmonics of a piano tone not multiples of the base frequency?

Why does a metal block make a shrill sound but not a wooden block upon hammering?

In a microwave oven, why do smaller portions heat up faster?

Why does canola oil heat up in the microwave?

How does the center of mass move forward on a rocking chair?

What happens to the units when squaring a variable?

Burning Fuels and Producing Water