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On a workday the average decibel level of a busy street is 71 dB, with 100 cars passing a given point every minute. If the number of cars is reduced to 40 every minute on a weekend, what is the decibel level of the street?
A rigid tank contains 1.40 moles of an ideal gas. Determine the number of moles of gas that must be withdrawn from the tank to lower the pressure of the gas from 27.2 atm to 5.90 atm. Assume the volume of the tank and the temperature of the gas re..
A passenger train is travelling at 32 m/s when the engineer sees a freight train 384 m ahead of his train travelling in the same direction on the same track. The freight train is moving at a speed of 5.7 m/s.
If the airplane somehow continues to fly as if nothing had happened, where is engine relative to the airplane at the moment the engine hits ground.
A college campus features a large fountain surrounded by the circular pool. Two students start at the northernmost point of pool and walk slowly around it in opposite directions.
For many years Colonel John P. Stapp, USAF, held the world's land speed record. He participated in studying whether a jet pilot could survive emergency ejection.
Various voltages V are applied across a resistor and for each value of V the current I through the resistor is measured, What is the resistance R of the resistor
An old-fashioned single-play vinyl record rotates on a turntable at 58.0\({\rm rpm}\), What are the angular velocity in rad/s and period of the motion
Kieran takes off down a 50m high, 10° slope on his jet-powered skis. The skis have a thrust of 320 N. The combined mass of skis and Kieran is 50 kg (the fuel mass is negligible). Kieran's speed at the bottom is 40 m/s. What is the coefficient of k..
What is the period of oscillation of the scale? State your reply numerically in seconds.
Two point charges Q1=+5.00 nC and Q2= -3.00 nC are separated by 35.0cm. (a) What is the electric potential at a point midway between the charges? (b) What is the potential energy of the pair of charges? What is the significance of the algebraic si..
What is torque exerted by the fish about an axis
By how much does the carrier lengthen. what is the magnitude of his average velocity for the 200.
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