Jamal is at the state fair playing some of the games. At one booth, he throws a 0.50-kg ball forward with a velocity of 20.0 m/s in order to hit a 0.20-kg bottle sitting on a shelf, and when he makes contact the bottle goes flying forward at 25.0 m/s. What is the velocity of the ball after it hits the bottle?

Consider an ordinary, helium-filled party balloon with a volume of 2.2 ft3. the lifting force on the balloon due to the outside air is the net resultant of the pressure distribution exerted on the exterior surface of the balloon. using this fact, we can derive archimedes’ principle, namely that the upward force on the balloon is equal to the weight of the air displaced by the balloon. assuming that the balloon is at sea level, where the air density is 0.002377 slug/ft3, calculate the maximum weight that can be lifted by the balloon. note: the molecular weight of air is 28.8 and that of helium is 4.

Anybody wanna ? (picture included? )

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island