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Suppose the asteroid starts from rest at a great distance (effectively infinity), falling toward Earth. How much work would have to be done on the asteroid by friction to slow it to 600 m/s by the time it reached a distance of 3.00 108 m from Earth?
Suppose you drop a feather and a steel ball of equal masses (0.010 kg) at the same time from a height of 1.9 m and you are told that the feather hits the floor 4.5 s after the steel ball. Estimate the feather's drag coefficient
On a clear day at a certain location, a 150-V/m vertical electric field exists near the Earth's surface. At the same place, the Earth's magnetic field has a magnitude of 4.800 10-5 T. Compute the energy density of the electric field.
A ray of sunshine is passing from diamond into crown glass; the angle of incidence is 35.00 degrees. Determine the angle between the refracted blue and red rays
The hail comes straight down at a mass rate of m/?t=0.069 kg/s and an initial velocity of v0= -15 m/s. calculate the magnitude of the force exerted by the hail on the roof
question1a sailboat is being propelled westerly by the wind at 4ms. if the current is flowing 2ms to the northeast
A constant force, F = (4.63, ?3.79, 1.96) N,acts on an object of mass 18.9 kg, What is the total work done by this force
Two small beads having positive charges 18q and q are fixed at the opposite ends of a horizontal insulating rod, extending from the origin (the location of the larger charge) to the point x = d. As, a third small charged bead is free to slide on t..
Water is contained in a closed, rigid, 0.25 m3 tank at an initial pressure of 5 bar and a quality of 60%. Determine the final mass of vapor in the tank
The rotational velocity of a merry-go-round increases at a constant rate from 0.6 rad/s, What is the rotational acceleration of the merry-go-round
q1. what is the fundamental frequency of a 0.30 m long organ pipe that is closed at one end when the speed of sound in
you kick a soccer ball 15 meters without hurting your foot much. you then pump the ball up until it is really hard the
Starting from rest, you move with a constant acceleration of 2.1 m/s2 for 13.0 s and then move with an acceleration of -2.1 m/s2, What is your maximum speed attained
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