A student drops a rock from a bridge to the water 11.6 m below. With what speed does the rock strike the water? The acceleration of gravity is 9.8 m/s 2 . Answer in units of m/s.

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.

Wavelength, frequency, and energy are related. what happens to a wave as it’s wavelength gets shorter?

Explain earth's motion, using the terms "precession" and "rotation" in your answer.