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Force of a Baseball Swing. A baseball has mass 0.145 kg.
A) If the velocity of a pitched ball has a magnitude of 45.0 m/s and the batted ball's velocity is 55.0 m/s in the opposite direction, find the magnitude of the change in momentum of the ball.
B) Find the magnitude of the impulse applied to it by the bat.
C) If the ball remains in contact with the bat for 2.00 ms, find the magnitude of the average force applied by the bat.
An inductor L = 0.0470 H and a 35.0 ? resistor are connected in series to a 3.70 volt battery and a switch. What is the potential difference across the resistor immediately after the switch is closed
A 73.0 kg base runner begins his slide into second base when he is moving at a speed of 4.4 m/s. How much mechanical energy is lost due to friction acting on the runner
A man goes fishing for dinner. He walks 5 km due West from his house, and tries to catch a fish, after 5 hours and no fish, he walks 5 km due North. What is the color of the bear
How much waste heat is produced by an electrical power station that uses 1.45 ? 1014 J of heat input with an efficiency of 38.0%, What is the ratio of waste heat to work output
A "195-watt" light bulb uses an average power of 195 W when connected to an rms voltage of 120 V. What is the resistance of the light bulb
A rod is initially at a uniform temperature of 0 o C throughout. One end is kept at 0oC , and the other is brought into contact with a steam bath at 100 o C.
During this process the arrow's deceleration has a magnitude of 1800 m/s2 and the block's acceleration has a magnitude of 450 m/s2
A transverse wave of frequency 14 Hz propagates down a string. Two points 15 cm apart are out of phase by pi/6. What is the wave velocity
A 10-m-by-14-m house is built on a 12-cm-thick slab of concrete. What is the rate of heat loss through the slab
A car of mass 1,250 kg is lowered onto a junk pile at the end of the cable of a large crane. If the car is accelerating downward at 0.19 m/s2
A force of 725N accelerates a 325kg object, initially moving 7.50 m/s, What impulse was applied to the object
1.calculate the average speed if you run 40m in 10 seconds.2.calculate the average speed of a cheeta that runs 130
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