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Please answer both parts A and B.
A) The decibel level of the noise from a jet aircraft is 130 dB when measured 16.8 m from the aircraft. How much sound power does the jet aircraft emit? Answer in units of W.
B) How much sound power would strike the eardrum of an airport worker 16.8 m from the aircraft? Assume the diameter of the worker’s eardrum is 1.7 × 10?2 m. Answer in units of W.
Two charges, and are the distance apart. These two charges are free to move but do not because there is a third charge nearby what should be the magnitude of the third charge and its placement in sequence for the first two to be in equilibrium.
a person slides from rest down a smooth hemispherical hill. At what angle does this person leave the surface
If it takes 3.60 x10-13 s for a nitrogen molecule to hit the wall and rebound with the same speed but moving in an opposite direction (assumed to be the negative direction), what is the average acceleration of the molecule for the period of this t..
Suppose you have an electric hot water heater for your house which is an aluminum cylinder which has a 0.6 m radius and is 1.2 m high. The walls are 1.0 cm thick.
Josh starts his sled at the top of a 2.9m -high hill that has a constant slope of 25 degrees. How far from the base of the hill does he end up
The collision between a hammer and a nail can be considered to be approximately elastic. Estimate the kinetic energy acquired by a 15-g nail
If a person of mass M simply moved forward with speed V, his kinetic energy would be1/2 MV^2. However, in addition to possessing a forward motion, What is the average angular velocity of his arms and legs
Atomic physicists usually ignore the effect of gravity within an atom. To see why, we may calculate and compare the magnitude of the ratio of the electrical force, What is the magnitude of the electrical force
A 190? resistor is connected to an AC source withE0 = 14V. What is the peak current through the resistor if the emf frequency is 100 Hz
The walls of a blackbody cavity are at a temperature of 27 degrees C. find the frequency of the radiation of maximum intensity
A Styrofoam box has a surface area of 0.79 m2 and a wall thickness of 2.0 cm. determine the thermal conductivity of the Styrofoam.
The shaft shown below has a solid round cross-section & is supported by bearing at A & B. Find the location of maximum bending stress in the shaft.
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