If you were to draw a 3rd harmonic of a tube open at both ends, what would you draw at the ends of the tube?

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.

This is for my 8th grade science class, i really don’t understand. can someone me? , lol.

Which governments provide garbage collection services to homes and businesses