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 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. μA ?

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 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. μA ?

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)...

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Question

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
?

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