A tv with a power rating 200. W uses 0.80 kwh in one day. For how many hours was the tv on during this day ? A. 160 hr
B. 0.16 hr
C. 4.0 hr
D. 2.5 hr

i think the answer would be b

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.