Recent content by RSG_9

I have solved this now. If anybody would like to know the solution for future reference I will be happy to help.

Homework Statement A hand pump was used to raise the pressure of the air in a flask of volume 1.2 x 10^-4 m^3, without and then with powder in the flask. - Without powder, pressure increased from 110kPa to 135kPa - With 0.038kg of powder, pressure increased from 100kPa to 141kPa 1) Show...

Ahh yeah, I understand that. Thank you very much for you help.

Because field strength, Nkg^-1... i.e force so relatively act against each other where as potentials Jkg^-1 is energy so act 'with' each other? (btw you're very helpful, usually people just give you the answer and think it's okay where as i like to understand things not just have to...

Ahhhh I think I have it? V from each mass is equal to -2GM/r V1 + V2 = -2GM/r + -2GM/r =-4GM/r

The forces are equal but in opposite directions to one another? (Also, you're welcome, I stalk around here a little bit only just decided to join)

Homework Statement Homework Equations g = GM/r^2 V = (-)GM/r The Attempt at a Solution I know the field strength at the mid point between two masses cancels out but I can't really get my head around the potential. My instinct is telling me that it would also cancel out but I...