The actual mechanical advantage of a pulley is 2. the pulley has 3 supporting strings. what is the efficiency of the pulley? the actual mechanical advantage of a pulley is 2. the pulley has 3 supporting strings. what is the efficiency of the pulley?

In a system, when potential energy decreases, then entropy also decreases. true false

The speed of sound in ice, water, and steam is shown. what best explains the speed of sound in different states of matter? sound travels fastest in ice because energy is easier to transfer when the molecules are close together. sound travels slowest in steam because the sound has to move around the gas molecules that are far apart. sound travels fastest in ice because the temperature of solids is always greater, so the heat transfers the sound energy. sound travels slowest in steam because the pressure is so great the sound cannot travel though the steam particles.

Atelevision set that has been running for a while heats up even the air around it. which two laws of thermodynamics could be used to analyze this scenario