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An apple that weights 2.7 N falls vertically downward from rest for 1.4 s.
a) What is the change in the apple's momentum per second?
b) What is the total change in its momentum during the 1.4-second fall?
determine the force exerted by the wood on the bullet.
Suppose for a brief moment the gas molecules hitting a wall stuck to the wall instead of bouncing off the wall. How would the pressure on the wall be affected
question springs having stiffness k 2k 4k 8k 16k and so on are tied in series. find the effective stiffness of the
A relief airplane is delivering a food package to a group of people stranded on a very small island. The island is too small for the plane to land on, and the only way to deliver the package is by dropping it. What is the speed of the package when ..
Two converging lenses with focal lengths of 40cm and 20cm are 14cm apart. Calculate the image position and image height
suppose that protons are fired towards the large flat side of a charged conducting plate. initial speed of the protons
question an object is placed 14.6 cm in front of a concave mirror with a focal length equal to 3.00 cm. a find the
A piece of copper wire has a resistance per unit length of6.1510-3?/m. Find the magnetic field strength at the center of the coil
A car wheel in diameter of 30 inches has a linear velocity of 30 mph. The car accelerates for 10 seconds. What is the angular displacement of the car wheel during the 10 seconds of acceleration
An automobile of mass m = 1100 kg is being towed by a truck whose driver observes that the tension in the rope is T = 3700 N, What is the work done to overcome friction in the car
A 972 kg car is going 20 m/s and the driver has to slam on his brakes to prevent an accident. what is the change in temperature of the brake pads and rotors
If a pump requires 9 ft (H2 O) NPSH and the liquid you are pumping has a vapor pressure of 4.5 psi at suction temperature. What suction pressure must you have to avoid pump cavitation
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