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A 75 W light bulb with a resistance of 179 ? is connected to a power supply with a 121 V. What is the internal resistance of the power supply? Express the answer with one decimal place.
Find a largest image that can be completely imaged on a 35mm film.
A 1500 kg elevator moves upward with constant spped through a veticle distance of 25m. Explain how much work was done by the tension in the elevator cable?
A gymnast with mass m1 = 40 kg is on a balance beam that sits on (but is not attached to) two supports. The beam has a mass m2 = 110 kg and length L = 5 m. Each support is 1/3 of the way from each end. at first the gymnast stands at the left end of..
Theoretically where on a rollercoaster should you feel the heaviest? Use the concept of inertia. Where do you actually feel the heaviest
A 0.10-kg cart traveling in the positive x direction at 10.0 m/s collides with a 0.30-kg cart at rest. What is the velocity of the 0.10-kg cart
An electron is observed traveling at a speed of 2.38 107 m/s parallel to an electric field of magnitude 11,460 N/C. How far will the electron travel before coming to a stop
A solid cylider of mass 9.8 kg and radius 28 cm is yoked to a spring as shown. What is the angular frquency of the cylinder rolling back
Catapult fires an 800-kg rock with an initial velocity of 100 m/sat a 40° angle from ground. What is the magnitude of the horizontal impulse
A challenge gaining prominence throughout the planet is the increased need for \"green\" or sustainable energy. In certain parts of the country, how much energy does the wind turbine generate
A worker stands still on a roof sloped at an angle of 21° above the horizontal. He is prevented from slipping by a static frictional force of 400 N. Find out the mass of the worker.
If we want to have successive fringes on a screen 5.9 cm apart near the center of the pattern, where should we place the screen
A 3.2-kg block is hanging stationary from the end of a vertical spring that is attached to the ceiling. What is the elastic potential energy of the system when the 3.2-kg block is replaced by a 4.1-kg block
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