Consider two submarines A and B traveling through water. Submarine A is moving at 5.00 m/s. Submarine B is moving at 8.00 m/s while emitting a sonar wave at a frequency of 1.20 × 103 Hz. The speed of sound in water is 1.50 × 103 m/s and there is no wind. Enter the answers in scientific notation. What frequency is detected by an observer riding on submarine A as the submarines approach each other? What is the observed wavelength of the sonar wave as the submarines approach each other?
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Physics, 22.06.2019 14:30
Two steel balls, each of mass m, are welded to a light rod of length l and negligible mass and are initially at rest on a smooth horizontal surface. a horizontal force of magnitude f is suddenly applied to the rod as shown. determine (a) the instantaneous acceleration a of the mass center g and (b) the corresponding rate at which the angular velocity of the assembly about g is changing with time.
Answers: 2
Physics, 22.06.2019 19:30
A47.2 g block of copper whose temperature is 480 k is placed in an insulating box with a 91.8 g block of lead whose temperature is 200 k. (a) what is the equilibrium temperature of the two-block system? (b) what is the change in the internal energy of the two-block system between the initial state and the equilibrium state? (c) what is the change in the entropy of the two-block system? the heat capacities of copper and lead are 386 j/kg·k and 128 j/kg·k, respectively.
Answers: 1
Physics, 22.06.2019 20:00
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Answers: 1
Consider two submarines A and B traveling through water. Submarine A is moving at 5.00 m/s. Submarin...
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