4. How could you determine the altitude represented by the contour lines of a map?

You should check the legend.

Contour lines do not indicate altitude.

Measure the distance between the lines.

Assume it is 300 feet because that is the standard.

In the sport of parasailing, a person is attached to a rope being pulled by a boat while hanging from a parachute-like sail. a rider is towed at a constant speed by a rope that is at an angle of 15 ∘ from horizontal. the tension in the rope is 1900 n. the force of the sail on the rider is 30∘ from horizontal. what is the weight of the rider? express your answer with the appropriate units.

In a system, when potential energy decreases, then entropy also decreases. true false

Which of the following is not a transverse wave? a) soundb) lightc) radiod) all of thesee) none of these