scientists classify rocks into three different types. what is the main basis for the classification system they chose?

a. color of the rock
b. shape of the rock
c. how the rock formed
d. who discovered the rock

Three charge are arranged as shown in the diagram. the magnitude of the net electrical force acting on the +6 uc charge, rounded to the tenths place, is .

A17,250 kg rocket is pushed with a thrust of 6,450,284 n. what is the acceleration of the rocket?

A14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earths velocity. earth mass is 6.0 * 10^24 kg. show your work assuming the rock earth system is closed.