If two tiny identical spheres attract each other with a force of 3 N when they are 25 cm apart, what is the mass of each sphere? A. 5,302 kg
B. 53,020 kg
C. 230 kg
D. 1.7 kg

A0.580-kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. the velocity of the rock is 4.50 m/s. what is the centripetal force acting on the rock? 15.5 n 5.22 n 69.8 n 23.5 n

Atomic nuclei of almost all elements consist of

Henry, whose mass is 95 kg, stands on a bathroom scale in an elevator. the scale reads 830 n for the first 2.4 s after the elevator starts moving, then 930 n for the next 2.4 s. part a what is the elevator's speed 4.8 s after starting? express your answer with the appropriate units.