9. There are approximately 90 million households that use TVs in the United States. Each TV uses, on average, 75 W of po

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9 There Are Approximately 90 Million Households That Use Tvs In The United States Each Tv Uses On Average 75 W Of Po 1 (40.94 KiB) Viewed 33 times

9. There are approximately 90 million households that use TVs in the United States. Each TV uses, on average, 75 W of power and is turned on for 6.0 hours a day. If electrical energy costs $0.15 per kWh, how much money is spent every day in keeping 90 million TVs turned on? II 10. A piece of Nichrome wire has a radius of 8.00 x 10 m. It is used in a laboratory to make a heater that uses 6.00 x 10 W of power when connected to a voltage source of 120 V. Ignoring the effect of temperature on resistance, estimate the necessary length of wire. m 11. he rms current in a copy machine is 3.00 A, and the resistance of the machine is 16.01. (a) What is the average power? w (D) What is the peak power delivered to the machine? w 12. A portable electric heater uses 20 A of current. The manufacturer recommends that an extension cord attached to the heater receive no more than 2.0 W of power per meter of length. What is the smallest radius of copper wire that can be used in the extension cord? (Note: An extension cord contains two wires.) m