2. A tower is 15.24 m high. At a certain distance away from the tower, an observer determines that the angle of elevation to the top of it is 41°. How far is the observer
from the base of the tower?

An astronomer at the equator measures the doppler shift of sunlight at sunset. from this, she calculates that earth’s tangential velocity at the equator is 465 m/s. the centripetal acceleration at the equator is 3.41  10 2 m/s 2 . use this data to calculate earth’s radius.

Ahydroelectric plant takes energy from water and turns it into electrical energy. what are the transformations of energy in the water molecules that are used in the process of generating electricity this way?

Transfer chemicals from one location to another to weather objects. a-water b-physical weathering c-chemical weathering