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To decide the amount of temporary hearing loss loud music can cause in humans, researchers studied a group of 20 adult females who were exposed to 108 dB music for 60 minutes. Eleven of the 20 subjects showed a 16 dB reduction in hearing sensitivity at 4000 Hz. What is the intensity corresponding to the threshold of hearing for these subjects?
A football is kicked at an angle of 28.4 degrees above horizontal and with an initial speed of 27.9. The ball lands on a level field. Determine The range of the football
Julie throws a ball to her friend Sarah. The ball leaves Julie's hand a distance 1.5 meters above the ground with an initial speed of 22 m/s at an angle 63 degrees, What is the distance between the two girls
A solid aluminum sphere has a radius of .50m and a temp of 75C. The sphere is completely immersed in a pool of water whose temis 25C. The sphere cools, while the water temp remains nearly 25C,bc it is a large pool.
in your right hand you hold a grocery sack with a gallon of milk. you left hand holds an identical grocery sack with a loaf of bread. which has the shorter period of oscillation
pool players often pride themselves on their ability to impart a large speed on a pool ball. in the sport of billiards
a mass of 0.30 kg is attached to a spring and is set into vibration with a period of 0.24s. what is the spring
a spring has a length of .248m when a .300kg mass hangs from it, and a length of .750m when a 2.22kg mass hangs from it. what is the unloaded length of the spring
suppose our experimenter repeats his experiment on a planet more massive than earth where the acceleration due to
A rotten pumpkin of mass 2.44 kg is dropped from a height of 2-m above the ground. Ignore air friction. Let the positive y-axis point down. How much momentum will the pumpkin have
Coulomb’s law for electrostatic force between two point charges and Newton’s law for gravitational force between two stationary point masses, both have inverse-square dependence on the distance between the charges/masses.
A body is dropped from rest and falls freely. Determine the position and speed of the body after 1.0, 2.0, 3.0 and 4.0 s have elapsed
a rail gun accelerates a projectile from rest by using the magnetic force on a current-carrying wire. the wire has
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