What makes astronomers think that impact rates for the Moon must have been higher earlier than 3.8 billion years ago?

The rocket is fired vertically and tracked by the radar station shown. when θ reaches 66°, other corresponding measurements give the values r = 32700 ft, r¨ = 85 ft/sec2, and θ˙ = 0.019 rad/sec. calculate the magnitudes of the velocity and acceleration of the rocket at this position.

Why is no-till farming more sustainable than many traditional methods of farming

You have 80 g of 60oc water and 80 g or 10oc water. what is the final temperature when the two are mixed? explain.