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A piano wire with mass 2.85 g and length 82.0 cm is stretched with a tension of 35.0 N. A wave with frequency 120 Hz and amplitude 1.40 mm travels along the wire. Calculate the average power carried by the wave. What happens to the average power if the wave amplitude is halved?
The velocity of a boat with respect to the shore is 2 meters/second. The velocity of the water with respect to the shore is 1 meter/second. What is the distance traveled by boat after 3 minutes if the boat is traveling in the opposite direction of..
a ball with mass 1kg is dropped from a height of 6m. the ball is caught by a person 2m above the ground. calculate the potential energy of the ball relative to the ground
When additional mass is added to the piston, the height of the piston decreases to 16.4 cm. Find out the new pressure applied by the piston.
Tension is maintained in a string as in the figure below. The observed wave speed is 22 m/s when the suspended mass is 3.0 kg. What is the mass per unit length of the string?
A 80- kg child sits in a swing suspended with 2.8- m-long ropes. Use conservation of energy to determine the speed the child will have at the bottom of the arc when she is let go
At some point in its orbit our asteroid is moving with a speed of 25 kilometers per second. Determine the kinetic energy of the asteroid
A mining lift, with a 80kg cage, should be able to pull up to the surface ten 90kg miners, from a 20m deep well, in 20s. If the gearboxes available have an efficiency of 75%, what should be the power rating of the DC motor used. If the driving gear p..
A series RCL circuit operating at 60.0 Hz contains a 49-? resistor and an 5.0-µF capacitor. what is the inductance of the inductor in this circuit
A 66-N %u22C5 m torque acts on a wheel with a moment of inertia 175 kg %u22C5 m2. how long will it take the wheel to make one revolution?
A solid block is attached to a spring scale. When the block is suspended in air, the scale reads 22.2N ; when it is completely immersed in water, What is the volume of the block
The mass of the airplane is m = 9010 kg. The plane travels at a constant speed around a circular path of radius R = 8.67 miles, What is the magnitude of the lift force acting on the plane
A 1200 kg ore cart is rolling at 10.8 m/s across a flat surface. A crane dumps 493 kg of ore (vertically) into the cart. How fast does the cart move after being loaded with ore? Assume that frictional forces with the flat surface may be neglected.
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