A guitar string 0.750 m long has a fundamental frequency of 440 hz. The guitarist wants to accent the 5th harmonic by picking at the first loop from the end of the string for this harmonic. How far from the end of the string (cm) should she pick?

How many molecules are present in 3 mols of silicon dioxide (sio2)?

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.

Two forces produce equal torques on a door about the door hinge. the first force is applied at the midpoint of the door; the second force is applied at the doorknob. both forces are applied perpendicular to the door. which force has a greater magnitude?