If you were trying to build a sound proof room, which of the following materials would you choose in order to absorb the most sound, based on the coefficient of absorption for each material

In a Millikan oil-drop experiment, the charges on several different oil drops were as follows: - 5.92; - 4.44; - 2.96; - 8.88. The units are arbitrary.

What is meant by focal length?

Caves are formed by the actions of a. acid rain b. plant roots c. river water d. groundwater

A boy having 0.2kg toy tied with a sting, having force 2N, angle 60º displaces it 5 m. What is the work done?

A loop of wire has the shape of a right triangle (see the drawing) and carries a current of i 5 4.70 a. a uniform magnetic? eld is directed parallel to side ab and has a magnitude of 1.80 t.

Which set of numbers best describes the displayed weights on a digital scale that shows each weight to the nearest half pound?

What is the equivalent volume occupied by three milliliters of water? three kilograms three cubic centimeters three centigrams three centimeters

Which list gives the proper sequence of energy changes that occur in a hydroelectric plant? The mechanical energy of the turbine rotates the generator parts The turbine blades capture the kinetic energy of the water Electrical energy is transferred

A locomotive is pulling 16 freight cars, each of which is loaded with the same amount of weight. The mass of each freight car (with its load) is 37,000 kg. If the train is accelerating at 0.

What is the special feature of the upper mantle?