Your Lecturer in class made the following statement: "We do not buy electrons from Eskom but we buy electrical energy!". Electrical Poerr can be described as electrical energy unit time. Electrical Energy can be brought from ESKOM in units of R2,50 for 1 KiloWatt- hour. How much will it cost to operate a 1200 W hairdryer continuously for 30 minutes?   A. R3,00 B. R1,50 C. 60c D. R6,00

Part A The flash unit in a camera uses a special circuit to "step up" the 3.0 V from the batteries to 280 V, which charges a capacitor. The capacitor is then discharged through a flashlamp. The discharge takes 12 us, and the average power dissipated in the flashlamp is 1.0x105 W. What is the capacitance of the capacitor? Express your answer with the appropriate units. µA C = Value Units Submit Previous Answers Request Answer

a. Which direction—clockwise or counterclockwise—does an electron travelthrough the wire shown?Explain.b. Does an electron’s electric potential energy increase, decrease, or stay the same as it moves through the wire?Explain.c. If you answered “decrease” in part b, where does the energy go? If you answered “increase” in part b, where does the energy come from?d. Which way—up or down—does an electron move throughthe battery? Explain.e. Does an electron’s electric potential energy increase, decrease, or stay the same as it moves through the battery?Explain.f. If you answered “decrease” in part e, where does the energy go? If you answered “increase” in part e, where does the energy come from?

To recharge a 11 V battery, a battery charger must move 3.8  105 C of charge from the negative terminal to the positive terminal. How much work is done by the charger? Express your answer in joules. J

Midterm Practice A conventional light bulb running at 40 W for 4 hours per day. How much energy does it spend in one month?   Select one: a. 480.0 kwh b. 4.800 kwh c. 0.480 kwh d. 4800 kwh e. 48.00 kwh

Using Question 17 as reference, solve Question 18. Thanks.  Explaination would be appreciated but not nessesaryy.

How much energy is consumed by a 1.1 kW hair dryer used for 12 min? Express your answer with the appropriate units. HẢ E = Value Units Submit Request Answer Part B How much energy is consumed by a 12 W night light left on for 10 hr? Express your answer with the appropriate units. HẢ ? E = Value Units

Suppose a battery operates a 2.25 W electric clock for 19.5 months. 1. What is the available energy content, in joules, of the battery? 2. How many years can a battery that supplies 7.75 × 104 J run a pocket calculator that consumes energy at the rate of 1.05 × 10-3 W?

QUESTION 6 w = 2nV O True O False

B2. Advance maths