Recent content by maltesers

If the point at which this happens is S metres from M If the Earth's and moons gravitational forces cancel each other out, then: (Gm)/(r-S)^2 = (GM)/ r^2 rearranging gives: S = r - (mr^2)/M where r is the distance between the moon and the earth M is the mass of the earth m is the...

Right, you need to use the fact that the orbit time is a day, because it stays over the same point on the Earth all the time (It must be over the equator for this to be possible i think). then use the equation that has already been put on the thread, in words: radius of the sattelites orbit...

sorry that table didnt come out properly

The following data shows the conductivity of 5 metals and the rate of change in gravitational potential energy due to induced current when the metal is passed through a electromagnetic field of 5.4mT on the end of a pendulum. you know, the classic eddy current experiment. I'm just wondering if...