Alightbulb has a power of 100 w. and is used for 4 hours. a microwave has a power of 1200 w and is used for 5 minutes.
a. how much energy is used by the lightbulb?
b. how much energy is used by the microwave?
c. the lightbulb has an efficiency of 1.8%. how much heat energy does the lightbulb produce in 4 hours?
Answers: 1
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An initially unpolarized light if intensity 500 w/m^2 passes through four polarizers. the transmission axis between adjacent polarizers is 45β. what percentage of the initial intensity is transmitted by the system?
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A1,700kg car is being used to give a 1,400kg car a push start by exerting a force of 140n the impulse on the smaller car during the 30.0s of contact is +670kg*m/s. what is the impulse of the smaller car on the larger car? -814 kg*m/s 0kg *m/s -670kg*m/s -550kg*m/s
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Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge, at the position of the second charge, change if the second charge is doubled? a. the field does not change b. the field strength decreases by half. c. the field strength doubles d. the field strength quadruples
Answers: 1
Alightbulb has a power of 100 w. and is used for 4 hours. a microwave has a power of 1200 w and is u...
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