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A member of an aircraft maintenance team crew wears protective earplugs that reduce the sound intensity by a factor of 340. When a jet is taking off, the intensity level experienced by the crew member is 71dB. What is the intensity level if the crew member removed his earplugs?
Two astronauts are, 4.86 m apart in their spaceship, speaking to each other. How far away from the Earth is the spaceship
A man is pulling a 40.0 kg crate across a level floor with a horizontal force, and the coefficient of kinetic friction is ?k = 0.59 for the crate and the floor. What is the normal force acting on the box
q1. an engine does 20000 j of work and rejects 6120 j of heat into a cold reservoir whose temperature is 285 k. what
solve this problem using either tabulated values from the tables or constant specific heats. Calculate the temperature of the exit stream
An ambulance with a siren emitting a whine at 1600 Hz overtakes and passes a cyclist pedaling a bike at 2.44 m/s. How fast is the ambulance moving
Find the rms voltage across each element in an RLC circuit with R = 9.9k? , C = 0.14?F , and L = 27mH
A tennis ball is hit with a vertical speed of 30 m/s and a horizontal speed of 25 m/s. How long will the ball remain in the air
To recharge a 15.0 V battery, a battery charger must move 3.63×105 C of charge from the negative terminal to the positive terminal. How much work is done by the battery charger
An empty capacitor is capable of storing 1.0 × 10-4 J of energy when connected to a certain battery. If the distance between the plates is halved and then filled with a dielectric, how much energy could this modified capacitor store when connected..
under controlled darened conditions in the laboratory, a light receptor cell on the retina of a person's eye can detect a single photon of light of wavelength 506nm, What is the intensity in W/m^2 deleivered to a rod
Starting from rest, a 6.70 kg object falls through some liquid and experiences a resistive (drag) force that is linearly proportional to the velocity of the object. What is the terminal speed for this object in this liquid
Illustrate at what angle should a curve of radius 140 m be banked, so cars can travel safely at 33 m/s without relying on friction?
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