PHYS 201 Midterm: PHYS 201 TAMU 201Fall 11 Exam 4
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No work needs to be shown; no partial credit given. (6 pts) 1. An organ pipe is open at one end and closed at the other end. If the wavelength of the first overtone standing wave is 1. 60 m, what is the length of the pipe? (a) 1. 60m (b)1. 20m (c)0. 80m (d) 0. 40 m (a)3. 20m (t) none of the above answers (6 pts) 2. A stationary whistle emits sound waves with frequency 600 hz. The speed of sound in air is 340 m/s. In an adiabatic process of an ideal gas, the gas is compressed to one-third of its original volume. this process, the temperature of the gas. In (a) decreases (b) increases (c) stays the same (6 pts) 4. In one cycle a carnot heat engine absorbs 800 j of heat and performs 600 j of work. Two speakers a and b emit sound waves that have the same wavelength and that are in phase.
