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Jet approaches at 1.60e2 m/s. On the jet, its engine whines at 8.0e2 Hz. What frequency does the whine sound to a standing listener, in Hz?
Dan is gliding on his skateboard at 4.00m/s . He suddenly jumps backward off the skateboard, kicking the skateboard forward at 6.00m/s, How fast is Dan going as his feet hit the ground
A crate of mass 14.0 kg is being pushed by a person across a horizontal floor. The coefficient of static friction among the crate and the surface is 0.350, while the coefficient of kinetic friction is 0.227. The person starts to push, however the cra..
A group of backpackers, after three days hiking, are 35 mi west of their starting position. Find the magnitude and the direction of their displacement on the third day
The electric field phasor of an electromagnetic wave in air is given by- E(z) = y 0.750 sin( 250 π z) V/m
A disk-shaped merry-go-round of radius 2.63 m and mass 155 kg rotates freely with an angular speed of 0.641 rev/s. What is the final angular speed of the merry-go-round
In 2.0 minutes, a ski lift raises four skiers at constant speed to a height of 130 meter. The average mass of each skier 65 kilogram. Find the average power provided by the tension
Point charges of 21.0 uC and 42.0 uC are placed 0.500 m apart. At what point along the line connecting them
A resistor has a resistance R, and a battery has an internal resistance r. When the resistor is connected across the battery, ten percent less power is dissipated in R than would be dissipated if the battery had no internal resistance. Discover the r..
A 500-kg ball at the end of a 30-m cable suspended from a crane is used to demolish an old building. If the ball has an initial angular displacement of 10o from the vertical, determine its speed at the bottom of the arc.
Two parallel metal rods form a plane inclined at 20.0° to the horizontal. The upper end of the rods are connected together by a resistor of 122.0 ?. What is the maximum speed of the bar
A force of 323N is applied horizontally to a crate in order to displace crate 30m across a level floor at a constant velocity. As a result of this work.
A long pole is used to lift a window. If a vertical lift of 85 N is needed to raise the window, elucidate what force must be exerted along the pole? Assume the pole makes an angle of 49° with the vertical wall.
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