Two pulses are traveling towards each other at 10 cm/s on a long string at t = 0 s, as shown below
Which diagram below correctly shows the shape of the string at 0.5 s?
a.
b
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Heat Engines: A heat engine absorbs 85.6 kJ of heat each cycle and exhausts 61.8 kJ.(a) What is the efficiency of the engine?(b) How much work does it do each cycle?
What will be an ideal response?
Suppose that we have two containers, one holding N molecules of helium gas, and one holding N/2 molecules of oxygen gas. Both are initially at room temperature. We then add the same amount of energy to each gas. Which is hotter at the end?
A. The helium B. The oxygen C. Both have about the same temperature. D. One cannot say without measuring.
A sans serif is a short line extending from the top or bottom of a character.
Answer the following statement true (T) or false (F)
Heat death refers to the universe
A) reaching the lowest energy state possible, which will mean the greatest level of entropy. B) ending after a massive fire. C) reaching a state where all stars expand and merge into each other. D) reaching the point where the process of radioactive decay is no longer possible.