David H's user avatar
David H's user avatar
David H's user avatar
David H
  • Member for 11 years, 8 months
  • Last seen more than a week ago
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  • The South
12 votes
Accepted

How did Eratosthenes know the suns rays are parallel?

9 votes

Projectiles and escape velocity

8 votes
Accepted

Gauss' law and an external charge

8 votes

Is the concept of a field necessary to electrodynamics?

7 votes
Accepted

Why a day is divided by 12/24 hours? Why the number 12?

6 votes

Accidental, unplanned breakthroughs in physics

6 votes
Accepted

*Attractive* Coulomb interaction as virtual particles exchange?

6 votes

What is the opposite of the Planck length?

5 votes

Is there any law that prevents an object with mass to become massless?

5 votes
Accepted

Cancel out Earth's Magnetic field

4 votes

Show that the electric field, $\mathbf{\vec{E}}$ cannot be generated by any static distribution of charges

4 votes
Accepted

Heisenberg uncertainty principle and minimum energy

3 votes

Intuitively, Why is Power Proportional to $I^2R$

3 votes
Accepted

Kinematics with non constant acceleration

3 votes
Accepted

Measuring the nearest order of magnitude

3 votes

Work done in an equipotential surface is zero?

3 votes
Accepted

Crackling of Speakers-Audio

2 votes
Accepted

If there were two equal masses with one mass in the middle which way would gravity pull it?

2 votes

Intuitive meaning of factor 2 in formula of vertical throw max height $h=v^2/2g$

2 votes
Accepted

Asking the vector form of the equation about velocity

2 votes
Accepted

Elementary physics question...requires calculus?

1 vote
Accepted

Why is th $\hat{r}$ component zero in this integral?

1 vote

What prevents an orbiting object from getting a speed which is greater than $c$?

1 vote

In astronomy what phenomena have theory predicted before observations?

1 vote

Conceptually, what is negative work?

1 vote

Relativistic Lorentz force law

0 votes

Why isn't this capacitor charging?

0 votes

How to observe a particle with indefinite position?

0 votes

What is the cause the light is affected by gravity?

0 votes
Accepted

Change of hue near shadows