Evaluate the net external force do
A 6500-kg satellite is in a circular earth orbit that has a radius of 3.4 x 107 m. A net external force must act on the satellite to make it change to a circular orbit that has a radius of 8.3 x 106 m. What work must the net external force do?
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A dye molecule has emission cross section cm2 at nm, and fluorescence lifetime 3 ns. Assuming the transition is homogenously broadened, calculate the signal intensity at which the gain is reduced by a factor of
A person pushes a 16.0-kg shopping cart at a constant velocity for a distance of 18.0 m. She pushes in a direction 30.0° below the horizontal. A 60.0-N frictional force opposes the motion of the cart. (a) What is the magnitude of the force tha
The coefficient of kinetic friction is 0.200, and the refrigerator moves a distance of 6.00 m. Find the work done by the kinetic frictional force.
In being launched from rest it moves through a distance of 87 m and has a kinetic energy of 3.80 107 J at lift-off. What is the work done on the jet by the catapult?
For comparison, a .22 caliber bullet has a mass of 2.6 g and, starting from rest, exits the barrel of a gun with a speed of 409 m/s. Determine the work done to launch the motion of both the hammer and the bullet.
Seventy percent of married couples paid for their honeymoon themselves. You randomly select 20 married couples and ask them if they paid for their honeymoon themselves. Find the probability that the number of couples who say they get their financa
A farmer wishes to put a fence around a rectangular field and then divide the field into three rectangular plots by placing two fences parallel to one of the sides.
What is the probability that every passenger who shows up cantake the flight? What is the probability that the flight departs with emptyseats?
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