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A baseball (m = 155 g) approaches a bat horizontally ata speed of 39.1 m/s (87.5 mi/h) and is hit straight back at a speedof 48.6 m/s (109 mi/h). If the ball is in contact with the bat fora time of 1.93 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 incomingball as the positive direction.
A closed ended manometer is used to measure the pressure in a tank of gas. The working fluid for the manometer has a specific gravity of 1.47. what is the gauge pressure (in Pa) in the tank
Two wheels can rotate freely about fixed axles through their centers. The wheels have the same mass, but one has twice the radius of the other. Compare the magnitudes of the two forces
Determine the force exerted by Mars on the sun. What is the acceleratopm of Mars? What is the acceleration of the sun
Discuss in detail why it might be dangerous to microwave raw eggs with their shell intact using the concepts learnt today (Hint: pV = nRT).
A 1600·kg car traveling with a velocity of 6·m/s north collides head-on with a 3200·kg truck traveling with a velocity of 4·m/s south. What impluse is delivered to the truck by the car
"A plane, diving with constant speed at an angle of 54.0 degrees with the vertical, releases a projectile at an altitude of 770m. what is the speed of a aircraft
The ground state energy of an electron in an infinite square well is 3.24 x 10-3eV. What is the width of the square well
A 3m-long rigid beam with a mass 140 kg is supported at each end. An 75 student stands 2m from support 1.
An object is placed in front of a concave mirror with a 21.4-cm radius of curvature. At what distance is the object from the mirror
Assuming a planet of mass m moves around the Sun (with mass Ms) in a circular orbit of radius R, find its rotation period. explain how the period changes if the mass of the planet is doubled
Suppose you throw a 0.058-kg ball with a speed of 10.9 m/s and at an angle of 30.9° above the horizontal from a building 10.8 m high. What will be its speed when it hits the ground
the water level in a vertical glass tube1.50m long can be adjusted to any position in the tube. a tuning fork vibrating
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