How much does it cost to run a 1500-W hair dryer for 18 minutes each day for one month (30 days) at a cost of 7¢ per kWh?$ ___

The cost to operate a clothes dryer for a year is $80.25. If the rate for electrical energy is 8.8¢/kWh, and the clothesdryer is used for 700 hours in a year, what is the power rating of the clothes dryer? Explain clearly.

A student in the laboratory connects a 14 Ω resistor, a 23 Ω resistor, and a 33 Ω resistor in parallel and then connects the arrangement to a 47 V dc source. (a) What is the current?  A(b) What is the power?  W

Six resistors R1=6.00 Ω, R2=2.00 Ω, R3=11.0 Ω, R4=10.0 Ω, R5=10.0 Ω, and R6=7.00 Ω are mounted as shown in the figure. The voltage of the battery is V = 14 Volts. What is the power dissipated in the R5 resistor?

A particular household uses a 1.9 kW heater 1.8 h/day ("on" time), four 100 W lightbulbs 6.0 h/day, a 2.8 kW electric stove element for a total of 1.0 h/day, and miscellaneous power amounting to 2.0 kWh/day. Part A If electricity costs $0.105 per kWh, what will be their monthly bill (30 d)? Express your answer using two significant figures. Cost = 33 $ per month Submit Previous Answers ✓ Correct Part B How much coal (which produces 7500 kcal/kg) must be burned by a 36 % -efficient power plant to provide the yearly needs of this household? Express your answer to two significant figures and include the appropriate units. O ΕΞΑ HÅ m= 100.97 kg Submit Previous Answers Request Answer ?

(a) Calculate the potential difference between points a and (b) identify which point is and b in Figure at the higher potential. 4.00 V 2.00 Ω + 12.0 V + w ww 4.00 Ω ww 10.0 Ω b a Note: there is an open circuit between points a and b.

A student in the laboratory connects a11 Ω resistor, a 28 Ω resistor, and a 33 Ω resistor in series and then connects the arrangement to a 56-V dc source. (a) How much current is in the circuit?(         ) A(b) How much power is expended in the circuit?(          ) W

A house has 3 tubelights, 2 fans and a television. Each tubelight draws 40 W. The fan draws 80 W and the television draws 60 W. On an average, all the tubelights are kept on for five hours, two fans for 12 hours each and the television for five hours a day. Find the cost of electric energy used in 30 days at the rate of Rs. 3.00 per KWH.

6. chapter27-question20 A 4.0 kW heater element from a dryer has a length of 100 cm. If a 20 cm section is removed, what power is used by the now shortened element at 120 V in kW? Option1 Option2 Option3 Option4 Option5 1.2 1.8 2.4 2.8 3.2 a) Option2 Option1 C) Option3 Option4 e) Option5

chapter27-question20 A 4.0 kW heater element from a dryer has a length of 100 cm. If a 20 cm section is removed, what power is used by the now shortened element at 120 V in kW? Option1 Option2 Option3 Option4 Option5 1.2 1.8 2.4 2.8 3.2 a) Option2 b) Option1 C) Option3 d) Option4 e) Option5