A sound is transmitted through equal lengths of the following materials: air, aluminum, and alcohol. Rank the materials in order, starting with the material through which you will hear the sound first. Write one or two sentences to explain your reasoning. (2 points)

Apositive charge moves in the direction of an electric field. which of the following statements are true? check all that apply. check all that apply. 1.the potential energy associated with the charge decreases. 2. the electric field does positive work on the charge. 3. the electric field does negative work on the charge. 4. the potential energy associated with the charge increases. 5. the electric field does not do any work on the charge. 6. the amount of work done on the charge cannot be determined without additional information.

Aball is thrown horizontally from a cliff at 8m/s .in what direction is the ball moving 2s later?

Acircular ring of charge with radius b has total charge q uniformly distributed around it. what is the magnitude of the electric field at the center of the ring? 0 keq/b2 keq2/b2 keq2/b none of these answers