Entropy: Which of the following is a false statement?
A. Entropy is a quantitative measure of disorder.
B. The total entropy change in one cycle of a Carnot engine is zero.
C. The entropy of an isolated system must be conserved (it remains constant).
D. Entropy can be measured in units of J/K.
Answer: C
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Find the net work done by friction on the body of a snake slithering in a complete circle of 3.93 m radius. The coefficient of friction between the ground and the snake is 0.25, and the snake's weight is
A) -330 J B) 0 J C) -3300 J D) -670 J
The evidence favors a universe whose overall geometry is
A) closed. B) flat. C) cylindrical. D) open. E) circular.
A scientific theory can be proven true if the correct experiments are performed
Indicate whether the statement is true or false
Calculate
(a) Calculate the magnetic field created by a coil made of copper wire that has 200 turns in 5 cm and carries a current of 5 A. (b) What is the magnitude of the flux density or inductance created by this coil in a vacuum?