Two friends, al and jo, have a combined mass of 195 kg. at the ice skating rink, they stand close together on skates, at rest and facing each other. using their arms, they push on each other for 1 second and move off in opposite directions. al moves off with a speed of 10.2 m/sec in one direction and jo moves off with a speed of 11.4 m/sec in the other. assuming that friction is negligible, find al's mass.

a lot of it means it can be "burned" for energy and sold at one price. if it is scarce, the price will go up

float.

archimedes' principle

denser than water sinks in water.

denser than mercury would sink in it

electrical potential energy =0.072 j

explanation:

electrical potential energy is given by

u= q δv

q= charge=6 c

δv= potential difference and is given by

δv= e d

e= electric field

d= distance=5 mm=0.005 m

δv=2.4 (0.005)=0.012 v

now electric potential energy= u= q δv

u=6 (0.012)

u=0.072 j