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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?
A ranger in a national park is driving at 52 km/h when a deer jumps onto the road 86 m ahead of the vehicle. After a reaction time of t s, the ranger applies the brakes to produce an acceleration of -2.9 m/s2.
Recognize and sketch all the external forces acting on the chair. Because the chair can be represented as a point particle of mass, draw the forces with their tails centered on the black dot in the middle of chair. Be certain to draw the forces so th..
What is wind velocity
A ship sets out to sail to a point 148 km due north. An unexpected storm blows the ship to a point 148 km due east of its starting point. (a) How far (in km) and (b) in what direction (as an angle from due east, where north of east is a positive angl..
Conclude the magnitude and directional angle
Write down an expression for the mass of the nucleus
How to find the position and height of an image
A trapeze artist swings in simple harmonic motion with a period of 4.2s. The acceleration of gravity is 9.81m/s2. Compute the length of the cables supporting the trapeze.
What is the net entropy change
Discover the magnetic field on the z axis What happens if the block is immersed in carbon disulfide
What are the original charges on each sphere
Displacement d2 is in the xz plane 30° from the positive direction of the x axis, has a positive z component, and has magnitude 1.10 m.
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