user avatar
user avatar
user avatar
user8718165
  • Member for 3 years, 10 months
  • Last seen more than a month ago
197 votes
8 answers
16k views

Why do we bend a book to keep it straight?

80 votes
7 answers
37k views

Which way does the scale tip?

77 votes
5 answers
16k views

Do the weights of two liquids not add when mixed?

  • 687
64 votes
7 answers
15k views

Do photons bend spacetime or not?

58 votes
15 answers
13k views

When a balloon pops and lets a brick fall, where does the energy come from?

52 votes
4 answers
30k views

Why do electrons occupy the space around nuclei, and not collide with them? [duplicate]

  • 3,409
41 votes
10 answers
20k views

When you hit a baseball, does the ball ever travel faster than the bat?

  • 2,825
35 votes
2 answers
17k views

Do magnets wear out?

  • 439
33 votes
8 answers
9k views

Why aren't rainbows blurred-out into nothing after they are produced?

  • 4,708
33 votes
8 answers
9k views

What determines which frames are inertial frames?

33 votes
6 answers
8k views

Can a wire having a $610$-$670$ THz (frequency of blue light) AC frequency supply, generate blue light?

  • 1,192
31 votes
7 answers
12k views

What happens to the magnetic field in this case?

  • 1,287
29 votes
4 answers
7k views

What causes a rotating object to rotate forever without external force—inertia, or something else?

  • 1,850
28 votes
3 answers
19k views

What prevents this magnetic perpetuum mobile from working?

27 votes
9 answers
13k views

Physical meaning of the angular momentum

  • 647
24 votes
5 answers
24k views

Why is there an electric field in a wire even though it is a conductor?

  • 1,405
21 votes
6 answers
46k views

Why the electric potential of Earth is zero?

  • 16k
20 votes
3 answers
9k views

Why doesn't hot charcoal glow blue?

19 votes
2 answers
24k views

Why two objects get charged by rubbing?

  • 5,037
17 votes
3 answers
6k views

Why does an unhinged body rotate about its centre of mass?

  • 455
17 votes
5 answers
42k views

If force is a vector, then why is pressure a scalar? [duplicate]

  • 1,350
16 votes
5 answers
18k views

Is entropy of all systems zero at absolute zero?

  • 255
14 votes
10 answers
27k views

How come gas molecules don't settle down?

13 votes
5 answers
3k views

Watts vs. volts amperes

  • 317
10 votes
2 answers
311 views

Why does foam in a rotating liquid accumulate near the centre?

9 votes
4 answers
10k views

Define Pressure at A point. Why is it a Scalar?

7 votes
3 answers
1k views

How can there be a voltage across an inductor if the voltage through any conductor is zero?

6 votes
2 answers
1k views

Stored energy and momentum in a magnetic field?

  • 1,062
6 votes
1 answer
4k views

Why doesn't the potential energy of any object equal 0

  • 2,510
6 votes
3 answers
832 views

Why does my cell phone still work inside a metal box?