Recent content by Hir

The torque is very small, and the center of gravity must be found. The thread used in the video is used to make clothes. If you have any questions, please take a picture or video.

I have noticed this phenomenon for at least ten years. If you think it is a problem with the rope, you should use it to hang other things, and I have tried it.

I don't think the world should be like this. I have clearly informed the result, but no one believes it. Therefore, no matter how good the video is, it is futile, because most people only believe in authority.

Why metals without magnetism never rotate, it doesn't matter if you think this phenomenon is not worth discussing.

I am very angry. Here there are only experimental results, no videos of fooling people. If you don't believe it, you can do your own experiments, and the cost is extremely low.

The magnet never rotates after demagnetization, and neither does the same shape iron, so if you can, experiment yourself.

The link has been updated, and those who need it can download and save it. Video (valid for 1 month):

This happened a long time ago, and I haven't found the answer. I posted a post on the Internet, and no one gave an explanation, so I really hope to find the answer. A magnet, no matter which pole is facing up, will rotate counterclockwise, as shown in the figure below. The magnet will not spin...

English is not my native language, and the way of communication is usually through the translation tools.

Calculation of work done by gravity is very simple, The approximate range can be calculated assuming the Earth is stationary; Due to educational cognition, it is not clear whether making a magnet as big as the Earth can increase the work of magnetism, although this is only a hypothesis.

1: There is a universal gravitational force between two 1 kg iron balls, and the energy generated by their mutual attraction is so small that it is difficult to observe; there is also an attractive force between a 1 kg neodymium magnet and 1 kg of iron, but the energy generated by their...

Confirm again, 12 nanonewtons is the attraction between the magnet and the earth's magnetic field? A new question is added here, if the earth's magnetic induction increases by 10,000 times, find the attraction between the magnet and the earth's magnetic field at this time.

If the earth is a large neodymium magnet, and the large magnet attracts the small magnet, the attractive force between them is so small, which is very surprising; Special thanks to #23 Thanks to all the people above.

iron/Fe https://physics.stackexchange.com/questions/100086/are-metals-more-heavy-due-to-the-earths-magnetic-field

Let me put it another way, put iron and non-magnetic materials of the same mass on both sides of the balance, and put the balance on the south pole of the earth's magnetic field. Due to the relationship between the earth's magnetic field, will the balance remain parallel?