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a student playing tetherball hits the ball so it moves in acircle around the central pole. The length of the tether is 2meters. The angle from the vertical is 20 degrees. 1.find thetangential velocity of the ball. 2. the student having nothingbetter to do, decides to go to Mars where g is 0.3 times the g onEarth and play tether ball there. What is the new angle of the ball if he hits the ball at the same tangential speed? Explain why thestudent can't get the angle to go to 90 degrees no matter whatplanet he goes to or how fast he hits the ball.
Four particles are held in place at the corners of a square with sides of length L. Each particle has a charge q and mass m. (a) What is the potential energy of the system of charges.
Two large parallel metal plates are 1.4 cm apart and have charges of equal magnitude but opposite signs on their facing surfaces. what is the electric field (in V/m) in the region between the plates
Radio astronomers detect electromagnetic radiation at 40.0MHz from an interstellar gas cloud. What is the magnetic field strength inside the gas cloud
An archer's bow is drawn at its midpoint until the tension in the string is 0.835 times the force exerted by the archer. What is the angle between the two halves of the string
question1a neutron star and a black hole are 2.400e12 m from each other at a certain point in their orbit. the neutron
question1though you are sitting on a park bench with your friend you take hold of his hat and start running in a
In a local bar, a customer slides an empty beer mug down the counter for a refill. The height of the counter is h. With what velocity did the mug leave the counter
Sodium coolant with a specic activity of 0.05 Ci/cm3 passes through a long pipe 8 in. in diameter. estimate the thickness of a cylindrical concrete shield
The box of a well-known breakfast cereal states that one ounce of the cereal contains 128 Calories (1 food Calorie = 4186 J). what is the heaviest barbell that could be lifted a distance of 2.08 m
A helicopter lifts a stretcher with a 74 kg accident victim in it out of a canyon by applying a vertical force on the stretcher. what power is deliever by the helicopter
A container of volume V is divided by partitions into three parts containing one kilomole of helium gas, Calculate the kilomole fraction and the partial pressure of each gas in the mixture
A 53 kg woman and a 80 kg man stand 13 m apart on frictionless ice. If they hold on to two ends of a rope, and the man pulls on the rope so that he moves 3m, how far from the woman will he be now.
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