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Bob Jacobsen's user avatar
Bob Jacobsen's user avatar
Bob Jacobsen's user avatar
Bob Jacobsen
  • Member for 6 years, 4 months
  • Last seen more than a week ago
  • Berkeley, California, USA
167 votes

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

87 votes

What happens when you put water under intense pressure?

73 votes
Accepted

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

58 votes

Does friction always oppose motion?

56 votes
Accepted

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

53 votes
Accepted

Should a soda bottle be stored horizontally or vertically?

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)?

32 votes
Accepted

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

29 votes

The Sun is giving us a low entropy, not energy

29 votes
Accepted

Prove no contraction in the orthogonal directions

27 votes

How do fusion reactors deal with blackbody radiation?

20 votes

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

18 votes

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

16 votes

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

16 votes
Accepted

Is Griffiths simply wrong here? (Electrostatic Boundary Conditions)

16 votes
Accepted

Formal Definition of Dot Product

15 votes

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

13 votes

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

12 votes

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

12 votes
Accepted

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

11 votes

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

10 votes

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

10 votes

Emission vs reflection

9 votes

Catalog of all particles

8 votes
Accepted

Why don't solids fall in air?

8 votes

Why transcendental terms in the laws of nature are dimensionless?

7 votes

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

7 votes
Accepted

What happens when we add free electrons to an insulator?

7 votes
Accepted

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

6 votes
Accepted

What is the point of particle accelerators with lower energies than the LHC?

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