An artificial earth satellite of mass m is circling around the earth in an orbit of radius R. If the mass of the Earth is M, then the told energy of the satellite is (a) 3GMm/2R (b) -GMm/2R (c) GMm/2R (d) -GMm/R​

Will you chech and finish these for me, because i am stumped with them.

You will be galileo perform the experiment to determine if objects with different mass fall at the same, or different, rates in the air and in a vacuum. (refer to the walk-through video to locate the online lab within the online textbook).

Does anyone know how to solve this problem? i really need . i made an attempt but i just cant get it. a metal rod is 25.000 cm long at 25.0 degrees celsius. when heated to 102.0 degrees celsius, it is 25.054 cm long. what is the coefficient of linear expansion for this metal.