A hydroelectric power plant operates at its rated power of 7 MW. If the plant has produced 26 million kWh of electricity in a specified year, determine the number of hours the plant has operated that year. 2893 hours 1125 hours 8760 hours 2460 hours O 3714 hours

A solar panel of length L and width W produces 28.4 kWh in a day. Under the same conditions (i.e. the same amount of solar energy available and the same efficiency) a solar panel of length 2L and width 2W would produce how many kWh in a day? Round off your answer to 2 decimal places, but do not write the unit.

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.

Problem 2: A large household air conditioner may consume 15.5 kW of power during normal operation. What is the cost of operating this air conditioner, in dollars, 3.5 h per day for 27 d if the cost of electricity is $0.105 per kW h ? cost =

A hair dryer is rated at 1200 W. One average, it is used for 400 minutes every month. The rate for electrical energy is8.8¢/kWh. What is the cost of electrical energy necessary to run the hair dryer for a month?

Assuming that the diet of an average Canadian consumes 2,500 food calories per day (1 cal=4200 J), compare the amount of energy consumed by a Canadian family of 5 in one year in their diet with the amount of electrical energy their household consumes. The average annual electricity usage of a family of 5 in n area can be estimated by 6000+5x1,600 kWh. What is the ratio of electrical energy consumption to caloric energy consumption for this family of 5? (1kWh=3,600,000 J). Your Answer: Answer

A clothes dryer uses 3,000 watts when the motor is running. A newer model uses 400 watts when the motor is running. For both models, a single drying cycle takes 1 hour to complete. Suppose that a family uses their clothes dryer four times per week and electricity costs $0.15 per kilowatt-hour. How much money will the family save in a single year if they replace their clothes dryer with a newer model? $81 $154 $223 $500

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 clothes  dryer is used for 700 hours in a year, what is the power rating of the clothes dryer? Explain in depth and clearly using this formula.

1. Figure shows the power consumption of a certain household in 1 day. Calculate: (a) the total energy consumed in kWh, (b) the average power per hour over the total 24 hour period. 1200 W PA 800 W 200 W →t (h) 12 2 4 6 8 10 12 2 4 6 8 10 12 noon

Q8 Q9 Q10 A small wind turbine has 3 blades that are 1m radius each. Take the air density on a typical day to be 1.24 kg/m³ and a wind of 12 m/s. What are the theoretical and actual power outputs of the wind turbine if a multimeter connected to the generator shows 12.1A and 33V of output 2 kW and 500 W 2 kW and 400 W 0.59kW and 400 W 0.59 kW and 500 W 2.5 kW and 1 kW 1 2 3 4 5 6 B C A A photobioreactor (PBR) is used to grow microalgae using sequestered CO₂ gas from a cement plant. Estimate the total volume, in litres, of the PBR to capture 1 tCO₂ per year assuming the growth rate is 1 g/L per day. A A D B E C D E B C D E 152L 202L 1520L Below are 6 statements on the subject of shallow geothermal aquifers listed 1 to 6. Which answer, A to E, contains only incorrect statements? 8950L 202800L Answer 2, 4 and 5 1, 2 and 3 Answer 3,4 and 6 A 4, 5 and 6 3, 4 and 5 Shallow geothermal aquifer exploitation does not rely on the thermal gradient. B B Solar heat could affect shallow geothermal…