User Adrian

11 votes

2 answers

913 views

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

asked Aug 24, 2013 at 15:49

8 votes

2 answers

986 views

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

asked Jan 24, 2022 at 2:43

4 votes

1 answer

764 views

What are magnetic field lines?

asked Aug 24, 2013 at 18:19

3 votes

3 answers

8k views

What does the height refer to in the Bernoulli equation?

asked Aug 27, 2013 at 13:34

3 votes

0 answers

218 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]

asked Aug 24, 2013 at 3:55

2 votes

2 answers

250 views

Directional subwoofer?

asked Aug 25, 2015 at 21:23

2 votes

3 answers

207 views

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

asked Oct 24, 2018 at 3:13

1 vote

1 answer

110 views

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

asked Oct 27, 2018 at 15:16

1 vote

2 answers

182 views

Moving air up a column without lifting

asked Oct 27, 2018 at 17:38

1 vote

0 answers

92 views

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

asked Nov 2, 2018 at 6:38

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?

asked Nov 9, 2013 at 3:02

1 vote

0 answers

52 views

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

asked Jan 10, 2020 at 0:59

0 votes

0 answers

48 views

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

asked Jan 31, 2020 at 2:06

0 votes

1 answer

56 views

Moving a projectile without recoil?

asked Feb 3, 2020 at 22:46

0 votes

0 answers

44 views

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

asked Feb 10, 2020 at 19:41

0 votes

0 answers

35 views

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

asked Mar 8, 2020 at 12:54

0 votes

3 answers

77 views

Redirecting light using light

asked Nov 10, 2018 at 18:37

Stack Exchange Network

17 Questions

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

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

What are magnetic field lines?

What does the height refer to in the Bernoulli equation?

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

Directional subwoofer?

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

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

Moving air up a column without lifting

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

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

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

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

Moving a projectile without recoil?

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

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

Redirecting light using light