Physics, 04.01.2022 02:50 carolyvillanueva
a 4.90x10^2kg hot-air ballon takes off from rest at the surface of the earth. the nonconservative wind and lift forces the balloon up, doing +9.70x10^4j of work on the ballon in the balloon. at what height above the earth does the balloon have a speed of 7.40m/s?
Answers: 2
Physics, 21.06.2019 23:30
A175 g lump of molten lead at its melting point (327 c) is placed into 55.0 g of water at 20.0 c. the specific heat of lead is 130.j/kg c and the hf of lead is 20,400 j/kg. when the lead and the water have reached equilibrium, what is the temperature of the mixture?
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In a system, when potential energy decreases, then entropy also decreases. true false
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The law of the conservation of momentum says that the total momentum of any closed and isolated system cannot
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Nacidified solution was electrolyzed using copper electrodes. a constant current of 1.18 a caused the anode to lose 0.584 g after 1.52 β 103 s. given that the charge of an electron is 1.6022 β 10β19 c, calculate avogadro's number. assume that copper is oxidized to cu2+ ions.
Answers: 1
a 4.90x10^2kg hot-air ballon takes off from rest at the surface of the earth. the nonconservative wi...
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