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A small asteroid that has a mass of 120 kg is moving at 225 m/s when it is 1000 km above the Moon.
(a) How fast will the meteorite be traveling when it impacts the lunar surface if it is heading straight toward the center of the Moon? The radius of the Moon is 1.737 x 106 m. (b) How much work does the Moon do in stopping the asteroid if neither the Moon nor the asteroid heat up in the process?
A small spherical cavity of radius r is made in a large electrics (a dielectric material) of constant polarization P. Neglecting the effects of outer boundaries of the electrets find the electric field at the center of the cavity.
A ray of light is traveling in a glass cube that is totally immersed in water. What is the refractive index of the glass
A 282 kg log is pulled up a ramp by means of the rope that is parallel to the surface of the ramp. The ramp is inclined at 23.0° with respect to the horizontal. The coefficient of kinetic friction between the log and the ramp is 0.87, and the log has..
Your little sister (mass 25.0 kg) is sitting in her little red wagon (mass 8.35 kg) at rest. Calculate the impulse you imparted to the wagon and its passenger
determine the r value for a wall constructed as follows the outside of the house consists of lapped wood shingles
Gary rides on a ferris wheel that takes 10.0 s to go once around; the radius of the wheel is 12.0 m. what is Gary's acceleration (magnitude and direction) when he reaches the lowest point of the ride
A spherical 3-mi diameter comet impacts the earth with a velocity of 20 mi/s. Calculate the amount of heat released from the impact site
Two people start at the same place and walk around a circularlake in opposite directions. How long will it be before they meet
When responding to sound, the human eardrum vibrates about its equilibrium position. Obtain what is the maximum acceleration of the eardrum
An electron and a proton have charges of an equal magnitude but opposite sign of 1.6 10-19 C. what are the magnitude and direction of the electrostatic force exerted on the electron by the proton
Carbon disulfide (CS2) has a vapor pressure of 300 Torr at room temperature (almost half of atmospheric pressure). estimate the average time between collisions
a current of 1.35 a in an inductor l results in a stored energy of 0.135 j. the current is then changed to 6.48 a in
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