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A baseball player catching a ball can soften the impact by pulling his hand back. Assuming that a 5-oz ball reaches his glove at 96 mi/h and that the player pulls his hand back during the impact at an average speed of 25 ft/s over a distance of 8 in., bringing the ball to a stop, determine the average impulsive force exerted on the player'shand.
A hydrofoil boat has an AISI 1020 Hot Rolled steel propeller shaft that is 100 ft. long. It is connected to an in-line diesel engine that delivers a maximum power of 2500 hp and causes the shaft to rotate at 1700 rpm. If the outer diameter of the sha..
a fire clay brick rho 2000 kgm2 k 1.0 wm-k cp 800 jkg-k of dimensions 5 cm by 10 cm by 15 cm is removed from a kiln
pump a can empty a tank in four hours while pump b takes only three hours to empty the tank. how long will it take to
Determine the radius of the crank R and the speed n of a slider crank mechanism, used in a shaker table. It is required that the average speed of the table is 5 m/s, and the maximum absolute acceleration is 3000m/s^2. Assume ratio R/L=0.2
a gas refrigeration cycle with a pressure ratio of 3 uses helium as the working fluid. the temperature of teh helium is
two kg of propane are initally saturated liquid at 0c. it undergoes an isentropic process that cools it to -40c.a what
a hot air balloon travels with the wind. the wind velocity is v6i 10j ms for the first hour and then it is 10i 5j ms
on an assembly line that fills 8-ounce cans a can will be rejected if its weight is less than 7.90 ounces. in a large
the crate containing 40 bricks sits on a slopped conveyor belt which is used to raise the crate to the next level of
The electrical conductivity of the pipe ke is constant over the temperature range of interest. The local rate of electrical heat production Se is then uniform throughout the pipe wall.
a 100kg pure iron block at 27 degrees c is dropped into an insulated rigid tank that contains 0.1m3 of unused engine
aaa estimates that every year more than 10000 drivers swerve off the road and end up submerged in water. this
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