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If a 90 mph (40.23m/s) fastball, with a mass of 0.145kg, is struck by a bat, and they are in contact for .005s, find the force which must be exerted by the bat on the ball for the player to make a home run? Assume the ball approaches the bat horizontally, the ball leaves the bat at an angle of 40 degrees above the horizontal, and the distance travelled for a home run is 50m. Hint: use kinematics first to find the velocity with which the baseball leaves the bat, then find the x and y components of the Impulse-Momentum equation to find the force.
gold which has a density of 19.32 gcm3 is the most ductile metal and can be pressed into a thin leaf or drawn out into
A parallel plate capacitor constructed of two disks spaced 2.0 mm apart and is charged to a potential difference of 500V. What is the farthest distance from the negative plate
question suppose a car is traveling along a straight road at 40 mph. the car then brakes to a stop. does this violate
A cart is propelled over an xy plane with acceleration components ax = 7.0 m/s2 and ay = -2.0 m/s2. what is the velocity of the cart when it reaches its greatest y coordinate
A 2 kg block is released from the top of a curved incline in theshape of a quarter of a circle radius R. Calculate the radius of the incline in meters
at a given instant a particle with a mass of 5.00 x 10-3 kg and a charge of 3.50 x 10-8 c has a velocity with a
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We can approximate an electron moving in a nanowire as a one-dimensional infinite square-well potential. Let the wire be 2 μm long. The nanowire is cooled to a temperature of 13K, What are the three lowest energy levels of the electrons
Two point charges, -25C and +60C , are separated by a distance of 22.0cm. What is the magnitude of the electric field at a point halfway among the two charges?
three children are throwing snowballs at each other. child a throws a snowball with a horizontal velocity v. if the
During liftoff, a hot-air balloon accelerates upward at a rate of 2.8m/s2. How long does it take to hit the ground
A young boy with a broken leg is undergoing traction. What is the magnitude of the force exerted on the femur by the lower leg
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