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A baseball player friend of yours wants to determine his pitching speed. You have him stand on a ledge and throw the ballhorizontally from an elevation 7.00 m above the ground. The ball lands 30.0 m away.A. What is his pitching speed?B. As you think about it,you’re not sure he threw the ball exactly horizontally. Asyou watch him throw, the pitches seem to vary from 5° below horizontal to 5° above horizontal. What is the range of speeds with which the ball might have left his hand? Enter the minimum and the maximum speed of the ball.
What is the time constant of a 9.50 thick membrane surrounding a 4.0×10-2 diameter spherical cell? Suppose the resistivity of the cell membrane as and the dielectric constant is approximately 9.00.
Suppose the tension in a cord is 12.0 N. If the speed of a wave in the cord is 9.50 m/s, then what must be the linear mass density of the cord
A 965-kg satellite orbits the Earth at a constant altitude of 94-km. What is the change in the system's potential energy
A sound wave generated by a source of frequency 440 Hz is moving through 25 oC air. What is the wavelength of the sound wave inside the steel
Station KAIM in Hawaii broadcasts on the AM dial at 870 kHz, with a maximum power of 50000 W. At maximum power, how many photons does the transmitting antenna emit each second?
Sirius is a binary star (two stars orbiting their center of gravity) they are separated by 2 light hours, What diameter aperture must we use in the telescope to resolve the red light(700 nm) from the two stars
An Earth satellite moves in a circular orbit with an orbital speed of 5200 m/s. Find the radial acceleration of the satellite in its orbit
A bicyclist starts from rest at the top of a hill and rolls down the hill without pedaling. what is the bicyclist's speed at the bottom of the hill
A 30.0- goldfinch lands on a slender branch, where it oscillates up and down with simple harmonic motion of amplitude 3.50×10?2 and period 1.50. What is the maximum acceleration of the finch
A 599 Hz sound wave travels through a substance. What is the speed of sound in the substance
After driving a portion of the route, the taptap is fully loaded with a total of 23 people including the driver, with an average mass of 69 per person. In addition, there are three 15- goats, five 3-chickens, and a total of 25 of bananas on their way..
A 68.4-kg skier coasts up a snow-covered hill that makes an angle of 25.5 ° with the horizontal. TWhat is the magnitude of the kinetic frictional force
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