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A batter hits a baseball 2.25 ft above the ground towards 3rd base. If the ball takes 0.65 s to get to the 3rd baseman (who is 95 ft from homeplate) and it passes just above the jumping 3rd baseman's glove, what is the initial velocity of the ball? Assume the 3rd baseman (with his glove on) can reach to a height of 9 ft, and can jump 34 inches off the ground. How many m/s @ how many degrees, with respect to the ground? If the left field wall is 361 ft away, and 9 feet tall, will this result in a home run?
A scaffold supports a weight of 500 lbs. If the force in one end support is 150 lbs, how much force is supported by the other end
A 10.7 kg bucket of water is suspended by a very light rope wrapped around a solid uniform cylinder 0.32 m in diameter with mass 14.2 kg. Calculate the torque due to the bucket of water
A person pushes a 16.2-kg shopping cart at a constant velocity for a distance of 27.5 m on a flat horizontal surface. She pushes in a direction 32.3 ° below the horizontal. A 35.3-N frictional force opposes the motion of the cart. (a) What is the mag..
An electron moving along x axis with a constant speed of v = 5x10^6 m/s i enters the region of a uniform electric field, What is the verticle displacement y of the electron 4 ns later
After a 3.01 resistor is connected across a battery with a 0.21 internal resistance, What is the rated emf of the battery
A pendulum oscillating on the moon has the same period as a(n) 3.14 m pendulum oscillating on Earth. find the length of the pendulum on the moon
A laser beam with wavelength Lambda= 6328 Å is incident normal to the plane of a diffraction grating. find the distance between the two first- order maxima in the pattern
A thundercloud similar to the one described in Example 24.3 produces a lightning bolt that strikes a radio tower. find the effective resistance of the air during the lightning strike
A parallel combination of a 1.09-?F capacitor and a 2.81-?F one is connected in series to a 4.33-?F capacitor. This three-capacitor combination is connected to a 15.3-V battery
An intergalactic rock star bangs his drum every 1.50 s. How fast is the rock star moving relative to the earth
An athlete swings a ball, connected to the end of a chain, in a horizontal circle. Which rate of rotation gives the greater speed for the ball
Two in-phase loudspeakers are some distance apart. What is the spacing between points where constructive interference occurs? The speed of sound in air is 343 m/s
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