Which of the following wavelengths could NOT be present as a standing wave in a 2-m-long organ pipe open at both ends?
a. 4 m
b. 2 m
c. 1 m
d. 0.89 m
e. 0.5 m
d
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Which force can act over distances comparable to the distance between planets?
a. only electrical c. only magnetic b. only gravitational d. All of these choices.
Dry air at 20ºC, 101 kPa, passes through a 2-cm diameter tube at 5 m/s. If the tube is also at 20ºC and has acetone on its inside surface area, estimate the evaporation rate of acetone into air per unit area. Assume the density of saturated vapor acetone is 2.37 g/m^3.
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Critics in 1972 decried the report of the Club of Rome known as the "limits to growth." Why did this Club of Rome study, which predicted that materials would become economically too expensive to exploit in the future, cause such a stir?
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What are the two largest moons of Neptune and what makes them peculiar objects in our Solar System?
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