Mars has a mass of 6.4 x 1023 kg and its moon Phobos has a mass of 9.6 x 1015 kg. The magnitude of the gravitational force between the two bodies is 4.6 x 1015 N. Calculate the radius of the orbit between Mars and Phobos.

In a system, when potential energy decreases, then entropy also decreases. true false

Looking at this barometer, is the air pressure high or low? what type of weather would you expect? high, bad low, bad high, good low, good

Rank the six combinations of electric charges on the basis of the electric force acting on q1. define forces pointing to the right as positive and forces pointing to the left as negative. rank positive forces as larger than negative forces. q1,q2,q3 = positive(+) q1 = + q2 = + q3 = - q1 = + q2= - q3= + q1= - q2= + q3= + q1= + q2= - q3= - q1,q2,q3 = negative