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Sound travels at a speed of about 344 m/s in air. You see a distant flash of lighting and hear the thunder arrive 7.6 seconds later. How many miles away was the lighting strike? (assume the light takes essentially no time to reach you.) Express your answer to two significant figures and include the appropriate units.
At very fast car races the sound of the engine as a car approaches is much different than when it passes you. How fast would the car need to be going to have the change in frequency be one octave
A rocket is out in space, far away from any planet. At a certain time, it has a mass of 2.8 x 105 kg, most of which is fuel. what is the new mass of the rocket
Calculate the intensity distribution
An oil drop carries one excess electron and weighs 9.6 x10-15 N. What electric field strength is required to suspend the drop so it is motionless.
The collision between a hammer and a nail can be considered to be approximately elastic. Estimate the kinetic energy acquired by a 12-g nail
A large box with mass 45 kg is being pushed up a ramp at a 32o incline at a constant velocity by a man pushing parallel to the incline for 7.80 m, determine The force the man is pushing on the box
A conducting sphere carrying a charge ‘q' has a radius ‘a'. It is inside a concentric hollow conducting sphere of inner radius ‘b' and outer radius ‘c'. What is the charge on the outer surface
A black wood stove with surface area 4.6 m^2 is made from cast iron 4.0 mm thick. What is the rate of heat loss by radiation from the stove
A jeweler examines a diamond with a magnifying glass. find the angular magnification when the diamond is held 5.39cm from the magnifying glass
The Youngs Modulus for copper is 130 Gpa. What is the strain in the the copper wire under a stress of 120Mpa
at time t = 0 s, a puck is sliding on a horizontal table with a velocity 3.60 m/s, 35.0* above the + axis. What is the velocity of the puck at time t = 1.50 s
A 0.75 mm diameter copper wire carries a small current of 3.5 µA. What is the drift speed of the electrons in the wire
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