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A fan at a rock concert is 35.0m from the stage, and at this point the sound intensity level is 108dB . Sound is detected when a sound wave causes the tympanic membrane (the eardrum) to vibrate . Typically, the diameter of this membrane is about 8.40mm in humans
1) How much energy is transferred to her eardrums each second ? the answer should be in microJoules.
2) How fast would a 2.00mg mosquito have to fly to have this much kinetic energy?
3) How fast a typical 2.0 mg mosquito would have to fly (in mm/s) to have an amount of energy delivered to the eardrum each second when someone whispers (20 dB) a secret in your ear?
4) Compare the mosquito's speeds found in parts (B) and (C).Please enter your answer as a number (factor) without the units.
A bowling ball of mass 7.00kg is rolling at 3.00m/s along a level surface. Calculate the ball's rotational kinetic energy
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a soccer player kicks a rock horizontally off a 41.3 m high cliff into a pool of water. if the player hears the sound
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A 100 W point source radiates yellowish-green light of wavelength 555 nm uniformly in all directions. how far from the source could the light be detected
A block is attached to a chord passing over a pulley through a hole in a horizontal frictionless surface. what is the new angular velocity
A 12.0-V battery produces 205mA when it's across a 47.5? load, Find the potential difference across the battery's terminals
Water flows through a 4 cm diameter pipe at 4 m/s and with a gauge pressure of 2 atm. what will be the pressure in the narrower pipe
A mass m = 15 kg is pulled along a horizontal floor, with a coefficient of kinetic friction ?k = 0.1, for a distance d = 5.1 m. What is the work done by gravity as it comes to rest
three point charges lie along the y axis. a charge of q1 -9.28 microc is at y 6.26 m and a charge of q2 -7.56 microc
An observer moving toward Earth with a speed of 0.96 notices that it takes 5.2 for a person to fill her car with gas. Assume, in its place, that the observer had been moving away from Earth with a speed of 0.80.
A nuclear power plant generates(output) 500 MW. it is 34% efficient, How much does the water temperature rise
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