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Earth has a radius of 6.38 × 106 m, and is about 1.50 × 1011 m from the Sun. Mars has a radius of 3.40 × 106 m, and is about 2.28 × 1011 m from the Sun. If the intensity of electromagnetic solar radiation at the Earth is about 1370 W/m2, what is the intensity of electromagnetic solar radiation at Mars?
A rocket is fired at a speed of 75.0 m/s from ground level, at an angle of 67.2° above the horizontal. The rocket is fired toward an 11.0 m high wall, By how much does the rocket clear the top of the wall
A charge of +2 x 10^-7 C is 10 cm from a charge of -6 x 10^-6 C. Find the magnitude and direction of the force on each charge
A dad pushes tangentially on a small hand-driven merry-go-round and is able to accelerate it from rest to a frequency of 18 rpm, in 13.0 s. What force is required at the edge
A simple pendulum is 4.00 m long. What is the period of small oscillations for this pendulum if it is located in an elevator accelerating upward at 2.00 m/s2
A river 108.0 m wide flows toward the south at 35.6 m/min. A girl on the west bank wishes to reach the east bank in the least possible time. How long does it take her to cross the river
A 500-kg dragster accelerates from rest to a final speed of 110 m/s in 400 m (about a quarter of a mile), What is its average power output in watts and horsepower
A spring hanging from the ceiling has an unstretched length of 80 cm. What is the amplitude of the resulting oscillation
A glass flask whose volume is 1000cm3 at a temperature of 0.500?C is completely filled with mercury at the same temperature. compute the coefficient of volume expansion of the glass
During a particular car crash, it takes just 0.18 sec for the car to come to a complete stop from 50 km/hour. At what rate is the car accelerating during the crash
A current of 10^-14 A is produced in a free-air chamber operating under saturation conditions. The sensitive volume, in which electronic equilibrium exists, contains 0.22g of air. What is the exposure rate .
The pilot of an airplane notes that the compass indicates a heading due west. The airplane's speed relative to the air is 200 km/h. find the velocity of the airplane relative to the ground
A man at point A directs his rowboat due north toward point B, straight across a river of width 100 m. While the man is crossing the river, what is his velocity relative to the shore
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