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A bird is flying directly toward a stationary bird-watcher and emits a frequency of 1380 Hz. The bird-watcher, but, hears a frequency of 1450 Hz. What is the speed of the bird, expressed as a percentage of the speed of sound?
What is the speed of the center of mass
A pulsed carbon dioxide laser has an energy output of 1.00 J. This energy is released in the form of a 10^9 W pulse of infrared radiation lasting 10^-9 s, Find the equivalent capacitance of the network
The loaded cab of an elevator has a mass of 3.0 x10^3 kg and moves 236 m up the shaft in 23s at constant speed. At what average speed does the force from the cable do work on the cab?
A small but measurable current of 1.1 10-10A exists in a copper wire whose diameter is 3.1 mm. Assume the current is uniform. Calculate the current density
A physics book slides off a horizontal table top with a speedof 1.15 m/s. It strikes the floor in0.500 s. Find the height of the table top above the floor in meters
You and your friends are doing physics experiments on a frozen pond that serves as a frictionless, horizontal surface. What was the speed of each person before the collision
Nuclear transmutation (causing atoms of one element to become a different element) is possible using currently-available technology. Suppose you check metals prices and decide to try converting osmium into iridium, and that each atom transmuted re..
A 3.66-F and a 6.96-F capacitor are connected in series acrossa 30.0-V battery. A 7.49-F capacitor is then connected in parallelacross the 3.66-F capacitor. Determine the voltage across the 7.49-F capacitor.
In a single-slit diffraction pattern on a flat screen, the central bright fringe is 1.6 cm wide when the slit width is 3.9 x10-5 m. When the slit is replaced with a second slit, the wavelength of the light and the distance to the screen remaining unc..
An automobile having a mass of 1,000 kg is driven into a brick wall in a safety test. The bumper behaves like a spring with constant 5.55 106 N/m, What was the speed of the car before impact
A 1300-kg car is being driven up a 4.0° hill. The frictional force is directed opposite to the motion of the car and has a magnitude of f = 530 N. A force Farrowbold is applied to the car by the road and propels the car forward.
q1. suppose that the two speakers are separated by 2.50 m and are vibrating exactly out of phase at a frequency of 429
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