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At normal incidence, the intensity of sunlight at the Earth is 1400 W/m2. Assume for simplicity that all of the incident energy that strikes the Earth is absorbed. What is the force on the Earth due to radiation pressure from the Sun? Compare this with the gravitational force on the Earth due to the Sun.
A 80-kg driver can decrease his rotation rate in a flip from an initial rate of 3.0rev/s to a final rate of 1 rev in 2 sec by straightening his body. find his final moment of inertia, then find his initial moment of inertia
A juvenile elephant has a mass of 300kg. He wishes to fly using his very large ears. find the total surface area of his two ears
A small conductive rod of length 1.4 m moves with a constant velocity v=11 m/s in a direction parallel to a long wire carrying a current of 34 A. Calculate the electric potential induced across the rod
find the magnitude of the baseballs momentum.
A plane accelerates from rest at a constant rate of 5.00m/s2 along a runway that is 1800m long. What is the time tTO needed to take off
The electromagnetic wave that delivers a cellular phone call to a car has a magnetic field with an rms value of 1.50 × 10-10 T. How much energy does this wave carry through the window during a 30 s phone call
A 15.0g bullet with a speed of v=235m/s is fired into a block of wood that is initially at rest on a frictionless surface. Determine the mass of the wooden block
Three unknown resistors are in a bin; let's call them red, green, and blue. When a Physicist connects the three resistors in series to a 30 volt source she measures 1A of current. what is the charging time constant
What are the two main mechanisms that the planet Earth uses to balance water that goes up with the water that comes down over Earth.
A space station is constructed in the shape of a wheel 16 rm m in diameter, with essentially all of its 6.0×10^5 rm kg mass at the rim.
You wish to buy a motor that will be used to lift a30-kg bundle of shingles from the ground to the roof of a house. Determine the minimum torque that the motor must be able to provide
A rifle with a weight of 35 N fires a 5.0-g bullet with a speed of 250 m/s, If a 675-N man holds the rifle firmly against his shoulder, find the recoil speed of the man and rifle
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