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A train is approaching a signal tower at a speed of 40 m/s. The train engineer sounds the 1000 Hz whistle, and a switchman in the tower responds by sounding the 1200 Hz siren. The air is still, and the speed of sound is 340 m/s.
a. What is the frequency of the train whistle tone, heard by the switchman, in SI units?
b. What is the frequency of the tower siren tone, heard by the engineer, in SI units?
I would assume there should be a linear force on the magnet in the other direction, but the magnetic field caused by the current in the wire should only create a torque on the magnet. So how is momentum conserved?
How could the manager use this information? Suppose after reviewing your classification scheme, the manager decides to place item P05 into the "A" category. What would some possible explanations be for that decision?
Plane monochromatic waves with wavelength 550nm are incident normally on a plane transmission grating having 360slits/mm. Find the angle of deviation in the third order
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Earth's atmosphere is constantly bombarded by cosmic ray protonsthat originate somewhere in space. If the protons all passed through the atmosphere, assume that each square meter of Earth'ssurface would intercept protons at the average rateof 1400..
Riders on the Power Tower are launched skyward with an acceleration of 4g, after which they experience a period of free fall. What is a 60 kg rider's apparent weight during the launch
What affect would there be on the calculated value of L if we waited a significantly long amount of time after the ice melted to read the final mixture temperature rather than promptly reading the thermometer? Assume the environment is at a lower ..
A stream of doubly ionized particles (missing two electrons and therefore carrying a net charge of two elementary charges) moves at a velocity of 3.0 x 104 m/s perpendicular to a magnetic field of 9.0 x 10-2 T. What is the magnitude of the force acti..
The time constant of an RL circuit with L = 25 mH is five times the time constant of an RC circuit with C = 40 µF. What is the time constant of the RL circuit
A sailboat is traveling east at 5.0 m/s . A sudden gust of wind gives the boat an acceleration a = (0.80 m/s^2 , 40 degrees north of east). A)What is the boat's speed 4.5s later when the gust subsides? B)What is the boat's direction 4.5s later whe..
A cannon is fired from the ground. The cannonball initially travels with a speed of 300 meter per second at an angel of 25o with respect to the ground. Find how far above the ground does the cannonball get to
Let us understand why the moon has no atmosphere......We need to remember some mechanics here! Taking the temperature of the surface of the moon to be 107 degree C (actually this is the mean day-time temperature), calculate the root mean square sp..
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