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Question: Workers around jet aircraft typically wear protective devicesover their ears. Assume that the sound level of a jet airplaneengine, at a distance of 30 m, is 130 dB, and that the averagehuman ear has an effective radius of 2.0 cm. What would be the power intercepted by an unprotected ear at a distanceof 30 m from a jet airplane engine?
A car travels on a long, straight highway at a constant speed of 30 m/s when it passes a stationary police motorcycle. How far will the motorcycle travel before it catches the car
A battery with EMF 6.0 Volts and internal resistance 0.1 ohms is connected by a long wire to a resistor R = 8.0 ohm. If the current in the solenoid is I = 200 Amps and is constant, then what is the current through the 8 ohm resistor
the current in the windings of a toroidal solenoid is 2.400 a. there are 500 turns and the mean radius is 25.00 cm. the
A body of mass 2.60 kg moves along the x-axis, and its motion is described by the equation x = 7 sin (24 t + 2), where x is in m and t is in s. Find the resultant force on the body at t = 0.100 s
Judy (mass 45.0 kg), standing on slippery ice, catches her leaping dog, Use the conservation of momentum to find the speed of Judy and her dog after the catch
A commercial airplane has an air speed of 280 m/s due east and flies with a strong tailwind. It travels 3000 km in a direction 5? south of east in 1.5 h.
The author gold wedding ring is stuck on his finger, and he must remove it. How much must the temperature of the ring be increased for it to slide past the knuckle
Consider that the kLa for O2 in the fermenter is 300 h-1. Scale the kLa for O2 to kLa for CO2 transfer using film theory, boundary layer theory, and penetration theory.
The average human can only sustain an acceleration of 5g for a few seconds before passing out. How many revolutions per minute should the cylinder rotate
In one frame of reference(say H), two events occur at the same point in space, but are separated by a time interval of 100 nanoseconds
A 0.3 kg ball traveling at 5 m/s strikes a wall and rebounds elastically, the collision took 0.02 seconds. What is the Impulse? What is the force on the wall
what will a spring scale read for the weight of a 54- woman in an elevator that moves upward with constant speed 5.0 ?
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