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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.
two resistors have resistances rsmaller and rlarger where rsmaller lt rlarger. when the resistors are connected in
Compare the shift in frequency if a 1750 Hz source is moving toward you at 15m/s versus you moving toward it at 15 m/s. Are the two frequencies exactly the same? Are they close? (b) Repeat the calculation for 150 m/s and then again (c) for 300 m/s. W..
A 10kg object is brought to the moon, where the acceleration due to gravity is only one-sixth of that on earth. What is the mass of the object on the moon
A 4.7 "kilo" bag of sugar is on a counter. How much work is required to put the bag on a shelf a distance of 0.57 m above the counter
Chinook salmon are able to move through water especially fast by jumping out of the water periodically. Determine the average velocity of the fish for the entire process of jumping and swimming underwater
a proton experiences an electric force of 95.2 fn 1 fn 1 fem to newton 1e-15 n in a uniform electric field. how
A 74 kg person is parachuting and experiencing a downward acceleration of 2.9 m/s2. The mass of the parachute is 5.8 kg. find the upward force on the open parachute from the air
On a cold night the temperatures of the two surfaces of a glass windowpane in a house are 7.8° C on the outer surface, Find the rate at which heat is conducted through the glass per square meter of window area
Consider a container with a partition in the middle. The container is thermally isolated from the environment. Initially one half of the container is filled with gas A (N molecules) and the other half with gas B (also N molecules).
A block of mass m = 3.40 kg is pushed a distance d = 2.30 m along a frictionless, Determine the work done by the net force on the block.
Richard is driving home to visit his parents. 135{\rm mi} of the trip are on the interstate highway where the speed limit is 65{\rm mph}. How many minutes does he save
a golfer tees off on level ground giving the ball an initial speed of 37.5 ms and an initial direction of 40.5deg above
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