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A 245 kg person lays on board that is supported only on the ends and that has a mass of 12.0 kg. If the person and the board are both 205 cm long and the person%u2019s center of mass is 38 cm from the left side, what is the force on either side where the board is supported?
Planet Z is 12,000 km in diameter. The acceleration due to gravity on Planet Z is 7.0 m/s2.
An underwater scuba diver sees the Sun at an apparent angle of 45.0° above the horizon. What is the actual elevation angle of the Sun
Two masses of 3 kg and 5 kg collide head-on, the former moving to the right with the speed 5m/s, What amount of mechanical energy is lost
A generator uses a coil that has 390 turns and a 0.65-T magnetic field. The frequency of this generator is 60.0 Hz, determine the length of the wire from which the coil is made
If I short out a D cell and draw a current of 0.5 A for a minute, how many coulombs of charge move through the circuit
A person pushes a 20 kg shopping cart at a constant velocity for a horizontal distance of 22 m. What is the work done by the gravitational force
A helicopter is ascending perpendicularly with a speed of 5.02 {rm m/s}. At a height of 115 {rm m} above the Earth, a package is dropped from the window.
A particle known as a pion lives for a short time before breaking apart into other particles. what is the lifetime according to a hypothetical person who is riding along with the pion
The figure shows the light intensity on a screen behind a double slit. The slit spacing is 0.20 mm, What is the distance from the slits to the screen
It takes a student t = 5.2 s to push a block m = 6 kg at a constant velocity over a distance of d = 4.6 m. How much power was applied to the block in Watts
The telescope at Yerkes Observatory in Wisconsin has an objective whose focal length is 19.4 m. Its eyepiece has a focal length of 10.0 cm. What is the angular magnification of the telescope
You throw a bouncy ball directly down toward the ground. When it leaves your hand, 1 m above the ground, it is moving at 5 m/s. What is the ball's maximum height after it bounces
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