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A baseball (m = 145 gram) approaches a bat horizontally at a speed of 39.1 m/s (87 miles per hour) and is hit straight back at a speed of 45.5 m/s (102 mi/h). If the ball is in contact with the bat for a time of 1.00 milliseconds, determine the average force exerted on the ball by the bat? Ignore the weight of the ball, since it is so much less than the force of the bat. Choose the direction of the incoming ball as the positive direction.
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A solid cylinder has an area of 10cm^2 and a height of 1.0m. The cylinder is composed of 2 different materials with mass densities of 2000 kg/m^3, what is the mass of the cylinder
A horizontal force of magnitude 31.2 N pushes a block of mass4.42 kg across a floor where the coefficient of kinetic friction is0.631. What is the increase in the kinetic energy of the block
Assuming biological substances are 98 percent water, estimate the masses of a cell with a diameter of 0.7 µm, a human kidney, and a fly. Take a kidney to be roughly a sphere with a radius of 5.0 cm and a fly to be roughly a cylinder 4.90 mm long a..
A typical power plant uses some fuel as the source of heat (QH) to drive a heat engine that does work (W) to drive a generator that is connected to the electrical grid.What is rate of flow and How do we find the power
an aluminum cup of 95 cm3 capacity is filled with glycerin at 18degc. how much glycerin if any will spill out of the
A wire 83.0 cm long lying along the x axis carries a current of 360.0 mA in the positive x direction, Find the magnitude of the force on the wire
A speedboat moves on a lake with initial velocity vector V1x= 9.27m/s and V1y= -2.83m/s, What are the components of the speedboat's final velocity
describe the importance of rare earth elements in science and technology. assess the most common uses of these
A tetrahedron has edges of length a, and charge Q at each apex. What is the potential energy of the system
A 0.10 m long solenoid has a radius of 0.05 m and 15000 turns. The current in the solenoid changes at a rate of 6.0 A/s. Determine the self-induced emf in the solenoid
The weight of passengers on a roller coaster increases by 60% as the car goes through a dip with a 38m radius of curvature
A small sphere with mass 1.20 hangs by a thread between two large parallel vertical plates 5apart. The plates are insulating and have uniform surface charge densities and. The charge on the sphere is = 8.80×10-6.
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