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A member of an aircraft maintence crew wears protective earplugs that reduce the sound intensity by a factor of 350. When a jet aircraft is taking off, the sound intensity level experienced by the crew member is 88 dB. What sound intensity level would the crew member experience if he removed the protective earplugs? PLEASE SHOW ALL OF YOUR WORK!!! f$
A piece of luggage is being loaded onto an airplane by way of an inclined conveyor belt. calculate the work done on the bag by the conveyor belt
A hot (70 C) lump of metal has a mass of 250 gm and a specific heat of .25 cal/gm-C. John drops the metal into a 500 gm calorimeter (specific heat of .10 cal/gm-C) containing 75 g of water at 20 C. Once they reach equilibrium, what will be the fin..
A 1300-{rm kg} car rolling on a horizontal surface has speed v = 50 km/h when it strikes a horizontal coiled spring and is brought to rest in a distance of 2.7 m. Illustrate what is the spring stiffness constant of the spring?
A person pushes horizontally with a force of 220 N on a 66 kg crate to move it across a level floor. The coefficient of kinetic friction is 0.28. What is the magnitude of the frictional force
A proton is released from rest at x = -3.00 cm in a uniform electric field of magnitude 1620 N/C, What is the change in potential energy when the proton reaches x = 5.00 cm
How do you establish the value of theta
A bicyclist is finishing his repair of a flat tire when a friend rides by with a constant speed of 3.6 m/s. Two seconds later the bicyclist hops on his bike and accelerates at 2.2 m/s2 until he catches his friend.
An artillery shell is red with an initial velocity of 328 m/s at 51.1 degrees above the horizontal. To clear an avalanche, it explodes on a mountainside 42.1 s after fi ring. What are the (a) x and (b) y coordinates of the shell where it explod..
Consider a series RLC circuit with R = 15 , L = 184 mH, C = 75 µF, and a maximum voltage of 141 V. What is the resonance frequency of the circuit
Suppose you pour water into a container until it reaches a depth of 12 cm, What is the pressure at the bottom of the container
A ball of mass 522 g starts at rest and slides down a frictionless track. It leaves the track horizontally, striking the ground a distance of 1 m from the end of the track after falling the vertical distance 1.25 m from the end of the track.
A car moving at 30.0 m/s is approaching a factory whistle that has a frequency of 500 Hz. find the apparent frequency of the whistle as heard by the driver
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