Sign of the
a glass marble is rubbed against a piece of silk. as a result the piece of fabric...
Sign of the
a glass marble is rubbed against a piece of silk. as a result the piece of fabric acquires extra electrons. what happens to the glass marble? (a)the marble has lost the same number of electrons acquired by the piece of silk. (b)the marble has acquired the same number of electrons acquired by the piece of silk. (c)the marble acquires a positive charge and repels the piece of silk. (d)the marble acquires a positive charge and attracts the piece of silk. (e)the marble acquires a negative charge and attracts the piece of silk. (f)the marble acquires a negative charge and repels the piece of silk. there may be more than one answer.
Answers: 2
Physics, 22.06.2019 19:30, isiahb123
A47.2 g block of copper whose temperature is 480 k is placed in an insulating box with a 91.8 g block of lead whose temperature is 200 k. (a) what is the equilibrium temperature of the two-block system? (b) what is the change in the internal energy of the two-block system between the initial state and the equilibrium state? (c) what is the change in the entropy of the two-block system? the heat capacities of copper and lead are 386 j/kg·k and 128 j/kg·k, respectively.
Answers: 1
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