Physics, 30.06.2019 08:30 minersaysay22
Without the sun, life on earth would not exist. there would be no warmth, no plants, no animals, no night and day. to power itself, the sun is constantly generating a nuclear reaction in its core, in which hydrogen nuclei are combined to form helium. this process is known as fusion, and a massive amount of energy. a) absorbs b) divides c) reflects d) releases
Answers: 1
Physics, 22.06.2019 11:50
Two resistors r1 and r2 may be connected either in series or parallel across an ideal battery with emf ε. we desire the rate of energy dissipation of the parallel combination to be 8.75 times that of the series combination. if r1 = 105 ω, what are the (a) smaller and (b) larger of the two values of r2 that result in that dissipation rate?
Answers: 2
Physics, 22.06.2019 15:00
Holes drilled several kilometers into earth’s crust provide direct evidence about earth’s interior in the form of
Answers: 1
Physics, 23.06.2019 00:30
What practical value did astronomy offer to ancient civilizations?
Answers: 2
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