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A typical decibel level for a buzzing mosquito is 40 dB and normal conversation is approximately 50 dB. How many buzzing mosquitoes will produce a sound intensity equal to that of normal conversation?
An immersion heater used to boil water for a single cup of tea plugs into a 120 V outlet and is rated at 300 W. What is the Resistance of the Heater
A group of hikers hears an echo 1.50 s after shouting. If the temperature is 24.0°C, how far away is the mountain that reflected the sound wave
A perfect negative index lens is used with a single molecule. How long time will it take to form a perfect image of themolecule with the ideal lens, and why?
A wire etched onto a computer chip carries a current of 0.000000033 A. In 1.8 milliseconds, how many electrons flow past a point on the wire
The blades in a blender rotate at a rate of 6400 rpm. What is the angular acceleration as the blades slow down
A charge of 6.53mC is placed at each corner of a square .470 m on a side. Determine the direction of the force on each charge
A soprano sings the note C6 (1046 Hz) across the mouth of a soda bottle. To excite a fundamental frequency in the soda bottle equal to this note, describe how far the top of the liquid must be below the top of the bottle
A toy car with mass of m=166 GRAMS crashes into a spring with constant k=45 N/m. If the car was going v=1.5 m/s, then how far will the spring compress.
To stretch a certain spring by 2.70cm from its equilibrium position requires 8.00J of work. What is the force constant of this spring
What is the period of revolution? please give me answer and units to both questions. dont just give me equation
A person lies flat on the sidewalk with her ear to the ground. A limb falls and two distinct sounds are heard, one from the air and the other from the concrete. How far away did the impact occur
A skier starts from rest at the top of a hill that is inclined at 10.9° with respect to the horizontal. How far does the skier glide along the horizontal portion of the snow
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