55 kj of heat are added to 200 kg of a metal at 28.00◦c and the temperature rises to 29.18◦c. what was the metal? 1. copper (specific heat = 0.385 j/g · ◦ c) 2. tungsten (specific heat = 0.134 j/g · ◦ c) 3. lead (specific heat = 0.127 j/g · ◦ c) 4. silver (specific heat = 0.233 j/g · ◦ c)

Suppose that recording station n is located 200 km north of the epicenter of an earthquake, and recording station s is located 100 km south of the epicenter of the same earthquake. which of the following statements would be true?

Astudent is performing an experiment comparing sound and light waves. the student gathers the following data. what conclusion does the student most likely make based on this data? light waves always travel the same speed; however, the speed of sound is determined by the medium that it travels through. all sound waves always have the same energy, so the temperature of the medium does not affect wave speed. light needs to vibrate particles, so it travels fastest in tightly packed solids, while sound does not need a medium, so it travels fastest in a gas. tightly packed particles in solids slow down the light waves; however, sound waves make particles bounce into each other, so they travel faster in solids.

Apair of 10μf capacitors in a high-power laser are charged to 1.7 kv.a. what charge is stored in each capacitor? b. how much energy is stored in each capacitor?