Question

it is always importam to show your work, which can yield partial credit. 1 Energy use at home Some common electrically powered devices found in a home, apartment or dorm room include: refrigerator (230 W, 8.0 hours), 60W-equivalent LED light bulb (11 W, 5.0 hours), cell phone charger (9W; 60. minutes), coffee maker (810 W, 10. min), LCD TV (150 W, 5.0 hours), and an electric alarm clock-radio (6.0 W, continuous). The numbers in parenthesis are the electric power rating for each device and a typical amount of time the device is active (turned on) during a day. (a) Calculate the electrical energy used by each device in one day. Give your answers in kWh. (b) What is the average power for each device in one day?

          it is always importam to show your work,
which can yield partial credit.
1 Energy use at home
Some common electrically powered devices found in a home, apartment or dorm room
include: refrigerator (230 W, 8.0 hours), 60W-equivalent LED light bulb (11 W, 5.0 hours),
cell phone charger (9W; 60. minutes), coffee maker (810 W, 10. min), LCD TV (150 W, 5.0
hours), and an electric alarm clock-radio (6.0 W, continuous). The numbers in parenthesis
are the electric power rating for each device and a typical amount of time the device is
active (turned on) during a day.
(a) Calculate the electrical energy used by each device in one day. Give your answers in
kWh.
(b) What is the average power for each device in one day?

it is always importam to show your work,
which can yield partial credit.
1 Energy use at home
Some common electrically powered devices found in a home, apartment or dorm room
include: refrigerator (230 W, 8.0 hours), 60W-equivalent LED light bulb (11 W, 5.0 hours),
cell phone charger (9W; 60. minutes), coffee maker (810 W, 10. min), LCD TV (150 W, 5.0
hours), and an electric alarm clock-radio (6.0 W, continuous). The numbers in parenthesis
are the electric power rating for each device and a typical amount of time the device is
active (turned on) during a day.
(a) Calculate the electrical energy used by each device in one day. Give your answers in
kWh.
(b) What is the average power for each device in one day?

Added by Felix A.

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