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Question
What is the speed of sound (in m/s) in carbon dioxide at the normal boiling temperature of water?
Question
A sonic depth gauge is placed 3.6 m above the ground. An ultrasound pulse sent downward reflects off snow and reaches the device 0.019 seconds after it was emitted. The air temperature is −20°C.
(a)
How far (in m) is the surface of the snow from the device? (Round your answer to at least three significant figures.)
m
(b)
How deep (in m) is the snow?
m
Question
In a student laboratory exercise, the wavelength of a 58,300 Hz ultrasound wave is measured to be 0.588 cm. Find the air temperature (in K).
Question
Pistons are fitted to two cylindrical chambers connected through a horizontal tube to form a hydraulic system. The piston chambers and the connecting tube are filled with an incompressible fluid. The cross-sectional areas of piston 1 and piston 2 are A1 and A2, respectively. A force F1 is exerted on piston 1. Rank the resultant force F2 on piston 2 that results from the combinations of F1, A1, and A2 given from greatest to smallest. If any of the combinations yield the same force, give them the same ranking. (Use only “>” or “=” symbols. Do not include any parentheses around the letters or symbols.)
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