Physics, 05.10.2019 17:30, elizebeth4501
Alamp has a power of 120 w and is left on for 24 hours. a television has a power of 350 w and is left on for 3 hours. which statement correctly compares the energy used by these devices?
a. the television uses 3,780,000 j less than the lamp.
b. the television uses 6,588,000 j less than the lamp.
c. the revision uses 3,356,000 j more than the lamp.
d. the television uses 10,368,000 j more than the lamp.
Answers: 1
Physics, 22.06.2019 21:00, brittneys55
What is the efficiency of an engine that does 80 j of work and exhausts 320 j of heat while taking in 400 j of heat ? a. 10% b. 20% c. 80% d. 25%
Answers: 1
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