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The TL of 10 mm thick sheet of plywood at 1000 Hz is 34 dB. Based on the Mass Law, what is the expected TL:
at 63 Hz?
at 31 Hz for a 20 mm thick sheet?
Two adjacent rehearsal rooms are separated by a 4" thick brick wall (TL250 Hz= 33 dB). The common wall is 10 m high and 10 m long. The total absorption in the receiving room is 200 metric sabins. A guitar playing in one room produces a measured sound pressure level at 250 Hz of 80 dB in that source room.
What is the electric field intensity produced by a charge at 10 meters, where the equipotential (electric potential) is 1.44 volts?
Liquid flows into a tank at 10 m^2/s and flows out of the tank at 3m^2/s. Find at what rate (m^3/s) does volume accumulate in the tank, calculate what is the volume of the tank
A charged belt, 75 cm wide, travels at 25 m/sbetween a source of charge and a sphere. The belt carries chargeinto the sphere at a rate corresponding to 100 µA. Compute the surface charge density on the belt.
In a certain RLC circuit, a46-?resistor, a11-mH inductor, and a 5-µF capacitor are connected in series with an AC power source for which Vrms=12V andf= 100 Hz. Calculate the phase between the current and the voltage.
Decide the speed a proton of charge +e should move towards a stationary nucleus of charge +e (we presume the nucleus doesn't move) so it is able to get within 1.0e-15 m before stopping
A 380-kg sailboat has an acceleration of 0.636 m/s2 at an angle of 65.5 ° north of east. Find the direction of the net force that acts on the sailboat
A driver running 1.9 m/s dives out horizontally from the edge of a vertical cliff and 2.4 s later reaches the water below. Part A) How high was the cliff?
Consider an LC circuit with L = 13 mH and C = 2285 pF. At what frequency is the reactance of the inductor equal to the reactance of the capacitor
A small ball is attached to one end of a spring that has an unstrained length of 0.188 m. The spring is held with the other end, and the ball is whirled around in a horizontal circle at a speed of 2.91m/s. The spring remains nearly parallel to the gr..
For tests using a ballistocardiograph, a patient lies on a horizontal platform that is supported on jets of air. determine the recoil velocity
A roller coaster car crosses the top of a circular loop-the-loop at twice the critical speed. Find the ratio of the car apparent weight to its true weight
Find the resulting angular speed of the disk (in rad/s) and describe the direction of rotation.
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