Ablock that has a mass m = 500 g is hanging at rest on a light string. a projectile with a mass m = 15 g moving horizontally with a velocity of 255 m/s strikes m and sticks in it. the block and its projectile swing up. how high does the center of mass rise?

After the near spacecraft passed mathilde, on several occasions rocket propellant was expelled to adjust the spacecraft's momentum in order to follow a path that would approach the asteroid eros, the final destination for the mission. after getting close to eros, further small adjustments made the momentum just right to give a circular orbit of radius 45 km (45 × 10^3 m) around the asteroid. so much propellant had been used that the final mass of the spacecraft while in circular orbit around eros was only 545 kg. the spacecraft took 1.04 days to make one complete circular orbit around eros. calculate what the mass of eros must be.

Describe the path of the electric current through a circuit?

True or false: the cycle of seasons on the earth is caused by the tilt of the earth on its axis toward and away from the sun.