1 kWh- 1000 j/sec 1 kWh - 3400 BTUS 1. 3000 watts =3 kW %3D 2. 50,000KW = 3. 4.5 x 10^ 6 watts = 4. 30 MW = 5. 6.8 x10^8 BTU = 6. If 200 kW are used for 500 hours, how kWh are used? mW mW kW kWh 7. If 4000 kw are used for 8,000 hours, how many kWh are used? 8. If a 100 watt light bulb is used 2 hours a day for 5 days, how many kWh are used? 9. A family heats 80,000 gallons of water per year. It takes 0.2 kwh to heat each gallon. If each kwh costs $ 0.10, how much will the family spend per year? 10. How much energy is saved, in kWh, if a family that uses a 100 watt light bulb for an hour a day for 30 days switches to a 60 watt bulb instead?

1 kWh- 1000 j/sec 1 kWh - 3400 BTUS 1. 3000 watts =3 kW %3D 2. 50,000KW = 3. 4.5 x 10^ 6 watts = 4. 30 MW = 5. 6.8 x10^8 BTU = 6. If 200 kW are used for 500 hours, how kWh are used? mW mW kW kWh 7. If 4000 kw are used for 8,000 hours, how many kWh are used? 8. If a 100 watt light bulb is used 2 hours a day for 5 days, how many kWh are used? 9. A family heats 80,000 gallons of water per year. It takes 0.2 kwh to heat each gallon. If each kwh costs $ 0.10, how much will the family spend per year? 10. How much energy is saved, in kWh, if a family that uses a 100 watt light bulb for an hour a day for 30 days switches to a 60 watt bulb instead?

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

a CFL or compact flourescent lamp uses less energy that its equivalent incandescent bulb. how much will a person save of he uses a 30 W CFL instead of 100 W incandescent lamp for 7 hours in 30 days? electricity is priced at 9.55 php/ kW.hr.
Suppose the electric company charges 2.6 cents per kW-h. How much does it cost to use a 125 watt lamp 4 hours a day for 30 days? Select one: a. 0.47 $ O. b. 1.87 $ O. c. None of the above d. 0.31 $ e. 0.39 $
A light bulb uses up a power of 2.6 kW/hr. If the rate is $153.42 per 1 kW/hr, and the light was on for 24 hours. a. How much kilowatt hour was consumed. b. How much was the bill after 24 hours?
Determine the work done by the system in each cycle abcd shown in the figure. P(Pa) b 12000 10000 8000 1.0 2.0 3.0 V(m?)
in she mudh ah on from HAy machine orhode a cabmhing poentiel es G0 000V an
An electric car is designed to run off a bank of 15-V batteries with total energy storage of 2.1 × 107 J. If the electric motor draws 4 200 W in moving the car at a steady speed of 14 m/s, how far will the car go before it is “out of juice?” a. 35 km b. 70 km c. 140 km d. 110 km e. 18 km
A water jet consumes 3750 W for 126 hours a week. a. What is the energy consumed (kWh) for a one-year period? b. What is the utility energy charge for this period at a rate of P750/kWh? c. What is the energy cost savings for this period if the water jet is switched off 5 hours a day? 1 year = 365.25 days?
A. At 7.15 cents per kilowatt-hour, what does it cost to operate a 9.00 hp motor for 10.0 he? B. At 7.15 cents per kilowatt-hour, what does it cost to leave a 75.0 W light burning 24.0 hours a day?
Calculate IL, using the Thevinin’s Theorem. the following are the values: V1 = 36 V, R1 = R3 = 22 Ω, R2 = R4 = 33 Ω, R5 = RL = 5 Ω REQUIRED VALLUES: RTHI, VTH1, RTH2, VTH2, IL
O-1.7 A O.3.1 A ww O 0.63 A O-1.4 A Mi R₁ 10.0 V + E The ammeter shown in the figure reads 4.4 A, R1 = 7.0 2, R2 = 5.0 2, and R3 = 2.0 2. What is /1? A
10 of 35 > Under certain circumstances, potassium ions (K*) in a cell will move across the cell membrane from the inside to the outside. The potential inside the cell is -65.5 mV and the potential outside the cell is zero. What is the change in the electrical potential energy of a single potassium ion as it moves across the membrane? change in potential energy: J Does the potential energy of the potassium ions increase, decrease, or remain the same as the ions move from the inside to the outside? O decrease O increase O remain the same
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…