Posts by physicshelp
Total # Posts: 6
Six grams of water changes from liquid to vapor at a pressure of one atmosphere. In the process, the volume changes from 1.3 cm3 to 2393 cm3. The latent heat of vaporization of water is 2.26 × 106 J/kg. Find the work done. Answer in units of J Find the increase in ...
Which metals temperature increases more? 1. Unable to determine 2. Same in both 3. B 4. A
Two pieces of metal (A and B) are identical in every way, except that A has a much larger thermal expansion coefficient. If equal amounts of heat are added to both pieces of metal, which metal does more work on its surroundings? 1. A 2. B 3. They do the same work. 4. Unable to...
A mass of 4.77 kg of chilled water at 0C is placed in a freezer which is kept at −19.2C. Approximately how much electric energy is needed to operate the compressor to cool this water to −19.2 C if the room temperature is maintained at 24.2C? The...
A boat exerts a force of 417N pulling a water skier who is 64kg at rest. The skier speed is 15m/s. over what distance was the force exerted?
WHAT ARE THREE THINGS ARE REQUIRED TO PRODUCE VOLTAGE? THESE THREE THINGS ARE THE FUNDAMENTALS OF HOW AN ELECTRICAL GENERATOR WORKS.