An electric current heats a 221 g (0.221 kg) copper wire from 20.0 â°c to 38.0 â°c. how much heat was generated by the current? (ccopper = 0.093 kcal/kgcâ°)

Arigid tank is divided into two equal parts by a partition. one part of the tank contains 3 kg of compressed liquid water at 400 kpa and 60°c while the other part is evacuated. the partition is now removed, and the water expands to fill the entire tank. determine the entropy change of water during this process, if the final pressure in the tank is 40 kpa. use steam tables.

Wind and moving water provide energy. question 1 options: chemical mechanical thermal none of the above

Aspectroscope breaks light up into its colors, allowing scientists to analyze light from the solar system and universe. by studying the spectral line patterns, widths, strengths and positions, scientists can determine the speed, position, and of celestial bodies. a) age b) origin c) rotation d) temperature