A mountain slope and a skier make up a closed system with 21,800 J of
energy. When the skier starts her descent down the mountain, the mechanical
energy of the system is 19,500 J. By the time she reaches the bottom, the
system's mechanical energy has fallen to 18,230 J. How much of the total
energy is transformed into thermal energy?
Answers: 3
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What color would an object that reflects green and blue light appear to be in white light? a. blue b. cyan c. magenta d. black
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15. give an example for some particles or waves that are moving faster than light in everyday life 16. what is a laser? 17. what is an oscilloscope? 18. what does it means practically that nothing is faster than light in vacuum? 19. what is vacuum?
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Physics, 22.06.2019 05:30
An object weighs 40n in air, weighs 20n when submerged in water and 30n when submerged in a liquid of unknown density. what is the density of the liquid?
Answers: 2
Physics, 22.06.2019 14:40
During the experiment if you could triple the breakaway magnetic force with all other quantities left unchanged, what is the new value for the critical velocity if it was v0 (initial velocity), initially? (b) now if you halved the radius with all other quantities left unchanged, what is the new critical velocity if it was v0 (initial velocity), initially? (c) if during the experiment, critical velocity quadrupled with all other quantities left unchanged, what is the new breakaway force if its magnitude was initially f0,?
Answers: 1
A mountain slope and a skier make up a closed system with 21,800 J of
energy. When the skier starts...
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