Recent content by inkpot

I am glad that you found the magda site of use. inkpot

Thank you all for your responses. My reason for making the enquiry was part of an attempt to use magnetism, either with permanent magnets or electromagnetism, as a means of damping the motion of an object floating in water. However, subsequent investigations seem to show that this may not...

As the magnet in question is a permanent one why is it necessary for an electric charge to be present in the equation relating field strength and force? Is there a good source on the fundamental nature of magnetism that anybody could suggest? There is a very interesting discussion at...

Is it possible to estimate the magnetic field strength of a permanent magnet from the heaviest weight that the magnet can lift? The heaviest weight that can be lifted can be found by trial and error. Any comments or suggestions appreciated. inkpot

Thank you all for your responses and for a very interesting discussion. Last night was again very cold, so I put three containers adjacent to the thermometer, two plastic and one metal, see attached file. The thermometer reached a minimum of ~ minus 3 celsius but water in the container on the...

Thank you for your response. The thermometer is hanging about 200 mm away from the side wall of the shed and the 50 ml container of water is next to it on a shelf. Both of them are ~1.5m from the wooden floor of the shed. Could you please elaborate a bit more on the difference between the...

Thank you for your response. Unfortunately, I didn't think of measuring the water temperature, it must have been too early in the morning. However, the water had been next to the thermometer since the previous evening so it must have been in sub-zero temperatures for 8 to 10 hours. inkpot

Could somebody please estimate the air temperature that water freezes at. During a recent very cold night I left an open plastic container of ~50ml of water next to an alcohol thermometer in an uninsulated garden shed. By morning the thermometer was reading minus 3 degrees celsius but the...

Tusike, Thank you for your further response. I will do what you suggest with any problems that I cannot solve. Best regards

Tusike, Thank you for your response. Do you know where solutions to past questions can be obtained? Best regards

Could anybody suggest a source of physics problems similar to those found at the following link: http://www.solvephysics.com/index.html The problems provided at this site are what I require but a difficulty that arose when trying to purchase their material is proving difficult to resolve...