2. a 12. 0 �ω resistor is connected in series with a 1.75 �� capacitor and a battery with ��� 13.50 �. before the switch is closed at time � = 0 �, the capacitor is uncharged. (a) what is the time constant? (b) what fraction of the final charge �k is on the capacitor at � = 48.5 �? (c) what fraction of the initial current �r is still flowing at � = 48.5 �?

To do work, this truck uses energy stored in chemical fuel and an electrical battery. how much total energy does this truck put out?

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.

Energy flows from the producer level to the level. is called