Physics, 28.05.2020 08:00 redrhino27501
A stereo is able to convert 20% of its electrical energy into sound. If 1000 joules of sound energy is produced, calculate the electrical energy used
Answers: 1
Physics, 22.06.2019 02:30
If a refrigerator is a heat pump that follows the first law of thermodynamics, how much heat was removed from food inside of the refrigerator if it released 380j of energy to the room?
Answers: 1
Physics, 22.06.2019 03:30
The focal length of a relaxed human eye is approximately 1.7 cm. when we focus our eyes on a close up object, we can change the refractive power of the eye by about 16 diopters. (a) does the refractive power of our eyes increase or decrease by 16 diopters when we focus closely? explain. (b) calculate the focal length of the eye when we focus closely.
Answers: 3
A stereo is able to convert 20% of its electrical energy into sound. If 1000 joules of sound energy...
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