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Q1. On a workday the average decibel level of the busy street is 82 dB, with 100 cars passing a given point every minute. If the number of cars is reduced to 10 every minute on a weekend, what is the decibel level of the street?
Q2. One mole of magnesium (6 1023 atoms) has a mass of 24 grams, and its density is 1.74 grams per cubic centimeter. You have a long thin bar of magnesium, 2.5 m long, with a square cross section, 0.07 cm on a side.
Next you eliminate the 11 kg mass, place the rod horizontally, and strike one end with a hammer. How much time t would elapse before a microphone at the other end of the bar will detect a disturbance?
The length of the mercury column is 4.0cm in pure melting ice and 28.0 cm in the steam. Compute the temperature for a length of 22.0.
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A child goes down a playground slide with an acceleration of 1.22. Find out the coefficient of kinetic friction between child and slide if the slide is inclined at an angle of 31.0 below the horizontal.
Estimate how many times planet has orbited its star
Compute the magnetic flux
A conveyor belt at a quarry lifts 2,000 kg of sand per minute up a vertical distance of 12 meters. The sand is originally at rest, then moves at a speed of 0.20 m/s all along the conveyor belt. What is the instantaneous power produced by this machine..
What are the total displacement and angle of displacement
A solid, rectangular iron bar measures .40cm by 1.0cm by 30cm. Find the resistance between each of the three pairs of opposing faces, assume the faces in question are quipotentials.
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