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A baseball (m = 145 g) approaches a bat horizontally ata speed of 40.9 m/s (91.5 mi/h) and is hit straight back at a speedof 51.7 m/s (116 mi/h). If the ball is in contact with the bat fora time of 1.44 ms, what is the average force exerted on the ball bythe bat? Neglect the weight of the bat, since it is so much lessthan the force of the bat. Choose the direction of the incoming ball as the positive direction.
Each second, 1150 m3 of water passes over a waterfall 95 m high. At what rate does the generator produce electrical energy
A steel bar is subjected to a vibration at one end, with an amplitude of 0.001 meters and a frequency of 250 Hz. Express the position of the end as a function of time
A velocity selector has an electric field of magnitude 2620 N/C,directed vertically upward, and a horizontal magnetic field that isdirected south. Charged particles, traveling east at a speed of6.75 x 103 m/s, enter the velocity selector and are ab..
Two skiers, one of mass m and the other 2m, start at the top of a mountain. The more daring skier (2m) takes the double black diamond trail to arrive at the bottom more quickly, while the other skier meanders back and forth on a green beginner tra..
A man drags a 78.0-kg crate across the floor at a constant velocity by pulling on a strap attached to the bottom of the crate. Find the magnitude of the tension in the strap
On the planet Newtonia, a simple pendulum having a bob with a mass of 1.33kg and a length of 186.2cm takes 1.45s , when released from rest, What is the mass of the planet Newtonia
at what height above the earth is the acceleration due to gravity 10% of its value at the surface, find the speed of a satellite orbiting at that height?
A child throws a snowball over a wall. The horizontal distance which the snowball travels is 3.83 m. Determine the initial speed of the snowball
A wire loop that encloses an area of 10 cm2 has a resistance of 5 Ohms. How much charge flows past a point in the wire
Where are the majority of older, metal-poor stars found in the Milky Way galaxy? The center of our Milky Way Galaxy can be observed most easilyat which of the following electromagnetic wavelengths? A spiral density wave refers to a region of enhanced..
One component of a metal sculpture consists of a solid cube with an edge of length 0.211 m. Find the cube\'s mass
The leg and cast weigh 290 -N, with the center of mass as indicated by the blue arrow in the diagram. The counterbalance w2 weighs 120 N. Determine the weight w1 and angle α needed in order that there is no force exerted on the hip joint by the le..
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