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An expensive grand piano has been pushed to the top of the ramp 1.77 m high inclined at 28.90 degrees at the back of a moving van. The workers think it is safe, but as they walk away, it begins to roll down the ramp. How long will it take the piano to reach the bottom of the ramp?
A copper kettle contains water at 24.0 °C. When the water is heated to 99.0 °C, Determine the volume of the kettle
Suppose a 34-kg child sits 1.24 m to the left of center on a seesaw of length, L= 3.74 m, pivoted in the middle. Find the normal force acting on the pivot point
An electron beam accelerated through a potential difference of 250V, and passes through a small circular hole, What is the diameter of the hole
At the beginning of the interval the astronaut is moving toward the right along the x-axis at 15.40, and at the end of interval she is moving toward the right at 5.40.
You are riding on a Jet Ski at some angle upstream on a river flowing with a speed of 2.8. Assume the Jet Ski is moving at a speed of 12 relative to the water. At what angle should you point the Jet Ski if your velocity relative to the ground is t..
q1. a father m 70 kg and son m 45 kg are standing facing each other on a frozen pond. the son pushes on father and
An ultrasonic transducer, of the type used in medical ultrasound imaging, is a very thin disk (m = 0.14 g) driven back and forth in SHM at 1.1 MHz by an electromagnetic coil.
an inventor has a rough design for a light fixture with a dimmer knob. the fixture contains a 50-microf capacitor an
If the car was in neutral and its brakes were off, so that the collision is approximately elastic, find out the final speed of the truck.
When an electric circuit is being assembled, a common practice is to twist together two wires carrying equal currents in opposite direction
Transverse waves travel with a speed of 18 m/s in a string under tension of 5 N. What tension is required for a wave speed of 27 m/s in the same string.
A person scuffing her feet on a wool rug on a dry day accumulates a net charge of -95?C. By how much does her mass increase
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