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A major leaguer hits a baseball so that it leaves the bat at a speed of 28.0 m/s and at an angle of 35.3 degrees above the horizontal. You can ignore air resistance.
A) At what two times is the baseball at a height of 9.00 above the point at which it left the bat?
t1,2 = _____ s
B) Calculate the horizontal component of the baseball's velocity at each of the two times you found in part A.
v h1,2 = ______ m/s
C) Calculate the vertical component of the baseball's velocity at each of the two times you found in part A.
v v1,2 = _______ m/s
D) What is the direction of the baseball's velocity when it returns to the level at which it left the bat?
= _______ degrees below the horizontal
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Draw a picture of a moving source and the waves surrounding it according to what you observed in this experiment. How does the spacing of the wavefronts in front of the source compare to those behind it?
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Determine the magnitude of the force experienced.
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Boat A negotiates a curve whose radius is 370 m. Boat B negotiates a curve whose radius is 120 m. Each boat experiences the similar centripetal acceleration. What is the ratio of speed of boat A to that of boat B.
The heating coil of a hot-water heater has a resistance of 20.0 and operates at 210 V. If electrical energy costs $0.080/kWh, what does it cost to raise 290 kg of water in the tank from 15 °C to 74° C.
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