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1. You point a tennis-ball serving machine straight up and put a piece of plastic wrap across the top of the barrel, placing a 10-g marble on top of the barrel. When a 58-g tennis ball in the machine is fired, it sends the marble into the air. The marble rises 210 m above the barrel mouth, and the tennis ball rises 71 m.
Neglecting the plastic wrap, what is the ball's launch speed?
Express your answer to two significant digits and include the appropriate units.
Consider a 7 kg ball with a radius of 0.8•m and rotating about an axis passing through its center. What is its rotational inertia
At what height above the earth is the free-fall acceleration 20 % of its value at the surface, Assume Rearth = 6.37 x 106 m. What is the speed of a satellite orbiting at that height
A transformer has an input coilwith Nin = 250 turnsand Nout = 900 turns. If the voltage across the inputcoil has an amplitude of 2.4 V, what is the voltage across the outputcircuit?
A ball swings in a vertical circle at the end of a rope1.40 m long. When the ball is36.3° past the lowest point on itsway up, its total acceleration is (-22.5 i + 20.2j) m/s2. Determine the magnitude of its radial acceleration.
A child, hunting for his favorite wooden horse, is running on the ground around the edge of a stationary merry-go-round, Find the shortest time it takes for the child to catch up with the horse
a positive point charge q1 2.15 times 10-5 c is fixed at the origin of coordinates and a negative point charge q2
charge moving perpendicularly to an electric. an electron has a kinetic energy equal to 2e-16 j moves horizontally into a uniform field. find the force of the electron between the plates and acceleration
The radiation curve of the Sun show that the brightest light from the Sun is yellow-green. Why, then, do we see the Sun as whitish instead of yellow-green?
A 2 kg ball traveling at 10 m/s hits a 6 kg block sliding down an incline (uk = 0.4) at 1 m/s. If the coefficient of restitution is e = 0.6, what will be the velocities of the objects just after impact? Also, after impact how far up the incline wi..
Give at least 3 examples from the electromagnetic spectrum (uses and dangers). Describe the three ways that electricity and magnetism are observed to interact. Describe how microwaves heat water.
As you walk away from a vertical plane mirror, your image in the mirror
Consider a spherical Gaussian surface and three charges: q1 = 1.62?C , q2 = -2.45?C , and q3 = 3.57?C . Find the electric flux through the Gaussian surface
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