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A 0.269-kg volleyball approaches a player horizontally with a speed of 16.2 m/s. The player strikes the ball with her fist and causes the ball to move in the opposite direction with a speed of 22.0 m/s. (a) What impulse is delivered to the ball by the player? kg·m/s (b) If the player's fist is in contact with the ball for 0.0600 s, find the magnitude of the average force exerted on the player's fist. N
Imagine that the temperature of a 225 g block of aluminum sitting in the sun increases from 275 K to 300 K
7.03 g of phosphorus reacts with bromine to form 61.39g of phosphorus tribromide, How many grams of bromine reacted in this reaction
The coil of a galvanometer has a resistance of 19.8 ?, and its meter deflects full scale when a current of 6.30 mA passes through it. What is the maximum current that this ammeter can read
A bat strikes a 0.145-kg baseball. Just before impact, the ball is traveling horizontally to the right at 60.0m/s, Find the vertical component of the average force on the ball
An object of mass 0.77 kg is initially at rest. When a force acts on it for 2.9 ms it acquires a speed of 16.2 m/s. Find the magnitude of the average force acting on the ball
The pilot of an airplane executes a loop-the-loop maneuver in a vertical circle. What is the pilot's apparent weight at the lowest point if his true weight is 160 lb
A relaxed crystalline lens has a refractive index n=1.42 and radii of curvature R1=+10.0mm, Calculate the focal length and optical power of the lens
A hot air balloon is rising upward with a constant speed of 10 m/s. When the balloon is 4 m above the ground, What is its speed just before it hits the ground
A light spring of constant k = 155 N/m rests vertically on the bottom of a large beaker of water, What is the elongation, DeltaL, of the spring
A mass of 0.2 kg attached to a spring oscillates on a frictionless horizontal surface. Its motion is described by x = 0.05 m cos(50 rad/s t + 1.57 rad). find the force constant and the mechanical energy
Common sports injuries result in the tearing of tendons and ligaments due to over stretching. how far must it be stretched from its relaxed length to tear it
The distance between the dipole and the point charge, by what factor would the force on the point charge due to the dipole change
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