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The distance to a point source is decreased with a factor of three. Suppose that the sound is emitted by the source uniformly in all directions.
1) By what additive amount does the intensity level increase?
2) By what multiplicative factor does the intensity increase?
A flight attendant pulls her 63N flight bag a distance of 312m along a level airport floor at a constant velocity. The force she exerts is 39N at the angle of 59° above the horizontal.
The earth spins on its axis once a day and orbits the sun once a year (365.24 days). Obtain its angular velocity as it revolves around the sun
Two identical conducting spheres each having a radius of 0.500 cm are connected by a light 1.60 m long conducting wire. estimate the tension in the wire.
Light of wavelength 630 nm passes through a grating and then onto a screen located several meters from the grating. Determine the wavelength of the second source
on a safari you are spear fishing while wading in a river. you observe a fish gliding by you. if your line of sight to
A test tube contains 2.56 10-4 m3 of liquid carbon tetrachloride at a temperature of 75.5° C. Find the volume of carbon tetrachloride in the test tube at -11.7° C
A 70-kg ski jumper starts from rest 59 m above the ground on an icy track and flies off the track at an angle of 31°, With what speed does the skier leave the track
A 5.40 kg mass attached to a spring oscillates with a period of 0.445 s and an amplitude of 17.0 cm. Find the total mechanical energy of the system
A transverse mechanical wave is traveling along a string lying along the x-axis. The displacement of the string as a function of position and time, y(x,t), is described by the following equation: y(x,t) = 0.0490sin(3.60x-182t) where x and y are in..
A uniform field of magnitude 1500 N/C points north. What is the force on an electron placed in the field
There are two light bulbs in a circuit, powered by one battery. One light bulb is a 100 watt light bulb and the other a 200 watt light bulb. How much power must the battery be supplying for the lights to be running at full power?
an electron passes through a point 2.55 cm from a long straight wire as it moves at 31.3 of the speed of light
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