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A 0.145-kg baseball pitched horizontally at 39 m/s strikes a bat and is popped straight up to a height of 41 m. If the contact time between the bat and the ball is 2.35 ms, calculate the average force [exerted by the bat on the ball] during contact. [Let the positive axis lie along the line from the batter to the pitcher, with the batter at the origin.]
A horizontal pipe contains water at a pressure of 100kPa flowing with a speed of 2.0m/s . The pipe narrows to one-half its original diameter. What is the speed of the water
an electric power line carries a current of 1400 a in a location where the earths magnetic field is 6.0 ? 10-5 t. the
An object is five focal lengths from a concave mirror. How do the object and image heights compare
A compact 60.00 kg object is attached to one end of a horizontal 40kg uniform steel tube 2.40 m long. What is the distance from the loaded end to the center of gravity of object-tube system?
A concave mirror has a focal length of 52 cm. The image formed by this mirror is in front of the mirror and located 106 cm away from it. What is the object distance
A severe thunderstorm dumped 2.5 in of rain in 30 min on a town of area 33km2. What mass of water (in kg) fell on town? One cubic meter of water has a mass of 103kg.
A 249.0 kg block of ice at 0*C is placed in a large lake. The temperature of the lake is just slightly higher than 0*C, and the ice melts. What is the entropy change of the ice
A 25 kg box is released from rest on a frictionless ramp making an angle of 42o with the horizontal. Determine the normal force on the box
A camera is supplied with two interchangeable lenses, whose focal lengths are 35.0 and 150.0 mm. A woman whose height is 1.80 m stands 8.00 m in front of the camera. What is the height (including sign) of her image on the film, as produced by each..
Calculate the minimum required initial velocity for a home run, for baseballs hit at the angles 10 degree, 20 degree, 30 degrees, and 40 degrees from the horizontal
the froghopper philaenus spumarius holds the world record for insect jumps. when leaping at an angle of 58.0degree
An infinitely long cylinder, radius a, carries a current I, distributed uniformly over its cross-sectional area. The axis of the cylinder coincides with the z-axis.
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