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A middle-aged people usually have poorer hearing than a middle-aged woman. In one case a woman can just begin to hear a musical tone, while a person can just begin to hear the tone only when its intensity level is increased by 6.9 dB relative to the just-audible intensity level for the woman. Find the ratio of the sound intensity just detected by person to the sound intensity just detected by woman?
Two men pushing a stalled car generate a net force of +690Nfor 6.6 sec. What is the final momentum of the car
An iron bolt is used to connect two iron plates together. The bolt must withstand shear forces up to about 3150 N. Calculate the minimum diameter for the bolt
Two different simple harmonic oscillators have the same natural frequency (f=7.10 Hz) when they are on the surface of the Earth. Calculate the new frequency of the pendulum
A hill that has a 25.7% grade is one that rises 25.7 m vertically for every 100.0 m of distance in the horizontal direction. At what angle is such a hill inclined above the horizontal?
Two cylinders, made from the same material and having the same length, have radii r1 and r2 with r1 > r2. Find the final angular velocity of the smaller cylinder
Which of the following devices use a diffraction grating in order to function?
Using a ball that has unknown mass m. You plot your data in the form of f2 versus M/L, with f in rev/s,M in kg, and L in m. calculate the mass m of the ball
Using Newtons law of gravitational force Find the magnitude of the gravitational exerted by one mass on the other
A hall sensor made from silicon is 0.40 nm thick and has a charge carrier density of 2.0 x 10 ^19 m^-3. What is the value of the magnetic field
If a harmonic object has a displacement that is described by: X = (.25m) sin (10 t), calculate the maximum velocity of this object
A sample of 50.0 kilogram of water at 20.00oC is mixed with 100.0 kilogram of water at 23.00oC. Evaluate the change in entropy
A 4-turn coil 2.0cm in diameter is rotated at 20 rev/s about an axis perpendicular to a uniform magnetic field. What is the magnetic field strength
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