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A tennis player standing 12.6 m from the net hits the ball at 3.27° above the horizontal. To clear the net, the ball must rise at least 0.458 m. If the ball just clears the net at the apex of its trajectory, how fast was the ball moving when it left the racket?
It is desired to magnify reading material by a factor of 2.21× when a book is placed 7.96 cm behind a lens. What is the power of the lens in diopters
q1. a spring with spring constant 14 hangs from the ceiling. a ball is attached to the spring and allowed to come to
A single square loop of wire 21.8 cm on a side is placed with its face parallel to the magnetic field between the pole pieces of a large magnet. When 6.27 A flows in the coil, the torque on it is 0.325 m·N. What is the magnetic field strength?
An open organ pipe (i.e., a pipe open at both ends) of length Lo has a fundamental frequency Fo, what is the new fundamental frequency
A tennis player hits a 1.45 kg tennis ball with a racket of mass 2.5 kg. If he hits the ball with a velocity of 7.5 m/s and then stops, what impulse did he imply on the ball
an underdamped spring-mass system consists of a spring with a force constant of 2.00 nm and a mass of 550 g. it is
A projectile is fired with an initial speed of 65.2 m at an angle of 34.5? above the horizontal on a long flat firing range. find The maximum height reached by the projectile
To a first approximation, the Sun consists of a gas of equal numbers of protons and electrons. The temperature at the center of the Sun is about 10^7 K, Estimate the pressure at the center of the Sun
a liquid is used to make a mercury-type barometer as described in section pressure in a fluid. the barometer is
Find out the gravitational potential energy
Two equally charged insulating balls each weigh 0.50 g and hang from a common point by identical threads 30 cm long, What is the magnitude of the charge on each ball
A roller coaster (482 kg) moves from A (3.63 m above the ground) to B (28.6 m above the ground). What is the change in the car's kinetic energy KEf - KEo from A to B
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