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Adrian
  • Member for 8 years, 11 months
  • Last seen more than a month ago
11 votes
2 answers
845 views

Would this pump water up? and if so, how far?

8 votes
2 answers
906 views

Is there a type of hologram that could be used to focus light?

4 votes
1 answer
703 views

What are magnetic field lines?

3 votes
3 answers
7k views

What does the height refer to in the Bernoulli equation?

3 votes
0 answers
213 views

Is it possible to have a magnet which looks like a hollow cylinder and who's north is interior and south is exterior? [duplicate]

2 votes
2 answers
220 views

Directional subwoofer?

1 vote
3 answers
146 views

What is the distance from the Earth where the centripetal force would equal the gravitational force?

1 vote
1 answer
61 views

What is the difference of pressure of a gas in a closed container at a given distance from the Earth?

1 vote
2 answers
144 views

Moving air up a column without lifting

1 vote
0 answers
51 views

How much energy is required to heat up a hot air balloon to make it neutrally buoyant?

1 vote
1 answer
2k views

How to calculate upward force of a container filled with a less dense gas than the surroundings where it is placed?

1 vote
0 answers
51 views

Does the Planck length imply that the smallest different between any two wavelengths must also have a limit?

0 votes
0 answers
46 views

Is it possible to pump water up beyond limits of a pipe's pressure capacity?

0 votes
1 answer
52 views

Moving a projectile without recoil?

0 votes
0 answers
34 views

What is the tension exerted at an arbitrary point on a hot air balloon?

0 votes
0 answers
31 views

If energy is neither created nor destroyed, where is the extra space coming from? [duplicate]

0 votes
3 answers
62 views

Redirecting light using light