A0.15 kg baseball moving at a velocity of -40 m/s collides with a 0.8 kg bat moving at a velocity of +30 m/s. if the velocity of the ball after the hit is +50 m/s, what is the final velocity of the bat? a. vf = +0.35 m/s b. vf = +13.1 m/s c. vf = +28.1 m/s d. vf = +32.3 m/s

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.

Two 1.20-m nonconducting wires meet at a right angle. one segment carries + 2.50 µc of charge distributed uniformly along its length, and the other carries - 2.50 µc distributed uniformly along it, as shown in fig. 21.50. ( a. find the magnitude and direction of the electric field these wires produce at point p, which is 60.0 cm from each wire. ( b. if an electron is released at p, what are the magnitude and direction of the net force that these wires exert on it?

Why is a noble gas different from other elements