User Bob Jacobsen

167 votes

Why does the same proportion of a radioactive substance decay per time period? (half life)

answered Feb 16, 2020 at 18:47

87 votes

What happens when you put water under intense pressure?

answered Mar 22, 2018 at 14:07

73 votes

Accepted

Is the Higgs boson an elementary particle? If so, why does it decay?

answered Jan 15, 2019 at 3:55

58 votes

Does friction always oppose motion?

answered Jun 27, 2019 at 19:47

56 votes

Accepted

If the first law of thermodynamics ensures conservation of energy, why does it allow systems to lose energy?

answered Aug 21, 2019 at 5:12

53 votes

Accepted

Should a soda bottle be stored horizontally or vertically?

answered Dec 1, 2019 at 21:31

52 votes

Accepted

If work is a scalar measurement, why do we sometimes represent it as the product of force (a vector) and distance (scalar)?

answered Mar 17, 2020 at 3:41

33 votes

Accepted

Clarification of the concept "less resistance means less heating" in a wire

answered Mar 1, 2020 at 13:14

28 votes

The Sun is giving us a low entropy, not energy

answered Apr 13, 2018 at 0:34

27 votes

Accepted

Prove no contraction in the orthogonal directions

answered Apr 12, 2018 at 1:44

26 votes

How do fusion reactors deal with blackbody radiation?

answered Jul 4, 2018 at 1:38

20 votes

Do photons actually slow down in a medium, or is the speed decrease just apparent?

answered Jan 14, 2020 at 6:20

18 votes

Why most distribution curves are bell shaped? Is there any physical law that leads the curves to take that shape?

answered Dec 28, 2019 at 19:18

16 votes

Accepted

Is Griffiths simply wrong here? (Electrostatic Boundary Conditions)

answered Jan 7, 2020 at 13:55

16 votes

Are there any satellite orbit earth perpendicular to the sun and what is the name of this kind of orbit?

answered Dec 25, 2019 at 5:30

16 votes

Accepted

Formal Definition of Dot Product

answered May 13, 2019 at 0:26

15 votes

Will the volt, ampere, ohm or other electrical units change on May 20th, 2019?

answered May 13, 2019 at 18:12

13 votes

Does the fact that we can only measure the two-way speed of light undermine the axiom of invariance?

answered May 18, 2019 at 20:38

12 votes

Is it really better for the environment if I take the stairs as opposed to a lift?

answered Oct 10, 2019 at 4:15

12 votes

Accepted

What are the "x" marks in a bubble chamber image?

answered Jun 29, 2018 at 3:36

11 votes

Can Second Law of Thermodynamics / Entropy override Newton's Laws?

answered Jan 8, 2020 at 18:40

10 votes

Why does the cloud in a straight line as if someone draw a line in the sky with a straight edge?

answered Aug 8, 2018 at 20:15

10 votes

Emission vs reflection

answered Dec 4, 2019 at 15:15

9 votes

Catalog of all particles

answered Apr 8, 2018 at 2:18

8 votes

Why transcendental terms in the laws of nature are dimensionless?

answered Dec 28, 2019 at 3:15

8 votes

Accepted

Why don't solids fall in air?

answered May 15, 2018 at 1:58

7 votes

Why do magnets attract of repel objects, if magnetic field only chages the direction of particles?

answered Apr 26, 2018 at 14:15

7 votes

Accepted

What happens when we add free electrons to an insulator?

answered Jun 27, 2018 at 13:50

7 votes

Accepted

Why are there many turns in the primary coil of a step-up electricity transformer?

answered Jul 17, 2019 at 15:28

6 votes

Why is there any vapor above the water surface at atmospheric pressure and room temperature?

answered Dec 31, 2019 at 20:24

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369 Answers

Why does the same proportion of a radioactive substance decay per time period? (half life)

What happens when you put water under intense pressure?

Is the Higgs boson an elementary particle? If so, why does it decay?

Does friction always oppose motion?

If the first law of thermodynamics ensures conservation of energy, why does it allow systems to lose energy?

Should a soda bottle be stored horizontally or vertically?

If work is a scalar measurement, why do we sometimes represent it as the product of force (a vector) and distance (scalar)?

Clarification of the concept "less resistance means less heating" in a wire

The Sun is giving us a low entropy, not energy

Prove no contraction in the orthogonal directions

How do fusion reactors deal with blackbody radiation?

Do photons actually slow down in a medium, or is the speed decrease just apparent?

Why most distribution curves are bell shaped? Is there any physical law that leads the curves to take that shape?

Is Griffiths simply wrong here? (Electrostatic Boundary Conditions)

Are there any satellite orbit earth perpendicular to the sun and what is the name of this kind of orbit?

Formal Definition of Dot Product

Will the volt, ampere, ohm or other electrical units change on May 20th, 2019?

Does the fact that we can only measure the two-way speed of light undermine the axiom of invariance?

Is it really better for the environment if I take the stairs as opposed to a lift?

What are the "x" marks in a bubble chamber image?

Can Second Law of Thermodynamics / Entropy override Newton's Laws?

Why does the cloud in a straight line as if someone draw a line in the sky with a straight edge?

Emission vs reflection

Catalog of all particles

Why transcendental terms in the laws of nature are dimensionless?

Why don't solids fall in air?

Why do magnets attract of repel objects, if magnetic field only chages the direction of particles?

What happens when we add free electrons to an insulator?

Why are there many turns in the primary coil of a step-up electricity transformer?

Why is there any vapor above the water surface at atmospheric pressure and room temperature?