A pine tree growing on a hillside makes a 75 degrees75° angle with the hill. From a point 8383 feet up the hill, the angle of elevation to the top of the tree is 64 degrees64° and the angle of depression to the bottom is 23 degrees23°. Find, to the nearest tenth of a foot, the height of the tree.

Agroup of monkeys is trying to cross the river in a rowboat. the maximum buoyant force on the rowboat is 2,000 n. the weight of the rowboat is 1,000 n. each monkey has a weight of 150 n. how many monkeys can safely cross in the rowboat at one time? explain your reasoning, including any calculations you used to find the answer.

The drag force, fd, imposed by the surrounding air on a vehicle moving with velocity v is given by fd = cdaρv 2/2 where cd is a constant called the drag coefficient, a is the projected frontal area of the vehicle, and ρ is the air density. an automobile is moving at v = 80 kilometers per hour with cd = 0.28, a = 2.3 m2, and ρ = 1.2 kg/m3.

Is a copper wire a conductor or insulator?