ED light bulb uses energy of 3W.  What is the electrical energy is used if the light is on for 2 hours? A)34510 J B)21600 J C)92850 J D)62630 J

10.a. To provide a useful purpose, electrical energy is most often converted toA. heat, chemical energy, or mechanical energy.B. heat, light, or mechanical energy.C. light, chemical energy, or mechanical energy.D. heat, light, or chemical energy.10.b. You wish to switch two hot wires so that the power is either off or provided to either one of two loads.To do this, you should use a(n) _______ switch.A. DPDTB. DPTTC. SPDTD. DPST

An air conditioner, 6400 watts, is used only 4 months out of a year. On a typical day it is used only 5.0 hours. If the cost of electricity is 12 cents per kwh. How much does it cost to run this air conditioner for the 4 months (assume 30 days per month). 137 words English (United States) O Focus MacBook Pro

1. What is NOT true about fire safety precautions? A. Avoid anything that would cause a fire around your working area. B. Look out for damaged wire insulation. C. If there is a burning smell on your electronic equipment, disconnect the power source right away. D. If there’s a fire, use any liquid available at home to extinguish a fire.   2. What will happen if you clean a soldering iron on a rag when in use? A. The rag will not remove the dirt. B. The soldering iron will cool down. C. The cleaning will be much easier. D. The cloth might burn and stick on the tip.   3. Why do we need to be careful when handling large capacitors, like ones on the washing machine and CRT television even after it is disconnected from the power source? A. It will cause a static shock. B. The capacitor will get damaged. C. They still hold high voltage that can cause electric shock. D. It will cause a short circuit that can damage the…