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A 0.25 kilogram mass attached to a string of length 1 meter is spun in a horizontal circle. Find at what speed must it travel so that the angle the string makes with the horizontal is 30 degree? Evaluate the magnitude of the tension in the string?
what is the distance of closest approach of the two particles. explain two ways in which you could you this equipment to raise the crate.
A magnetic field is oriented at an angle of 51 degree to the normal of a rectangular area 5.5 centimeter by 7.2 centimeter. evaluate what is the strength of the magnetic field
Tarzan, with a mass of 80.0 kg, wants to swing across a ravine on a vine, but the cliff on the far side of the ravine is 0.900 m higher than the cliff where Tarzan is now, How fast is Tarzan going at the bottom of his swing
A train is slowing down from 46 m/s to 12 m/s in 9.0 s. Assume constant acceleration. How far did it travel in this time
Explain how fast will he be moving backward just after releasing the ball?
How much time does the stone take to reach the ground.
An object is placed 5 cm in front of a spherical mirror. A virtual image is formed 10 cm behind the mirror. What is the magnification of the mirror
A man pushes a lawn mower on a level lawn by a force of 215 N. If 31% of this force is directed downward, and 50 W of power is expanded in pushing the mower 5.8 m, how much time is spent in pushing the mower this distance?-------s
An air-track cart is attached to a spring and completes oneoscillation every 5.67 s. What is the position of the cart when t =29.6 s
Inside a helium nucleus there are two protons, each of charge +e. Calculate the strengths of the electrostatic repulsive force and the gravitational attractive force between the two protons
Liz rushes down onto a subway platform to find her train already departing. She stops and watches the cars go by. Each car is 8.60 meter long. Evaluate the constant acceleration of the train
the specific heat of aluminum is .215 calories per gram per degree celcius. calculate the amount of heath required to raise the temperature
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