13)
in an inelastic collision, a steel ball of mass 200 g was hit hard into a large ball of dough of mass 700 g. the velocity of the steel ball was 25m/s. after the collision, the steel ball was stuck in the dough, and this combined system rolled for some time.

what was the velocity of the system of the steel ball and dough after the collision?
a) 5.6 m/s
b) 7.5 m/s
c) 8.8 m/s
d) 11.1 m/s

At very high pressures, gases become and will eventually a) more dense; become hotter b) more dense; change to a liquid or solid c) less dense; combust d) less dense; turn into a liquid

Identify the correct relation showing that the radius r of the orbit of a moon of a given planet can be determined from the radius r of the planet, the acceleration of gravity at the surface of the planet, and the time τ required by the moon to complete one full revolution about the planet. determine the acceleration of gravity at the surface of the planet jupiter knowing that r = 71 492 km and that t= 3.551 days and r= 670.9 × 10^3 km for its moon europa.

Suppose a soccer ball is kicked from the ground at an angle 20.0º above the horizontal at 8.00 m/s. the y-velocity is determined to be 2.74 m/s. how long will the ball be in the air? assume the ball lands at the same height at which it was kicked.