A penny is dropped into a well and it falls for 5 seconds before hitting the water. Show work! (a) What is the penny's speed when it hits the water?

(b) What is the distance the penny fell?

What is the earliest point in the universe that we can observe? why can’t we see back further than this?

Suppose while hauling rocks, you accidentally drop one. it breaks apart in flat, planar sections. what type of rock did you just drop? 20 points

Aboat radioed a distress call to a coast guard station. at the time of the call, a vector a from the station to the boat had a magnitude of 45.0 km and was directed 15.0° east of north. a vector from the station to the point where the boat was later found is = 30.0 km, 15.0° north of east. what are the components of the vector from the point where the distress call was made to point where the boat was found? in other words, what are the components of vector c = b - a?