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A physics professor demonstrates the Doppler effect by tying a 650 Hz sound generator to a 1.1 m long rope and whirling it around her head in a horizontal circle at 100 rpm. What are the highest and lowest frequencies heard by a student in the classroom?
A baseball pitcher throws a fastball at a speed of 45.00m/s. The acceleration occurs as the pitcher holds the ball in his hand and moves it throughout an almost straight-line distance of 4.0 m. compute the acceleration; assume that it is constant ..
Three boxes are being accelerated on a horizontal table with a 60-N force applied to box 1 at an angle 35o below the horizontal. What is the acceleration of the three boxes
Light from an argon laser strikes a diffraction grating that has 5395 grooves per centimeter. Determine the wavelength of the laser light
A conveyor belt at a quarry lifts 2,000 kg of sand per minute up a vertical distance of 12 meters. The sand is at first at rest, then moves at a speed of 0.20 m/s along conveyor belt. What is the instantaneous power generated by this machine .
a popular method of distributing music used to be on disks that had a radius of about 0.3m and spun at a constant angular velocity of about pi radians per second. Find the tangential velocity at the inner and outer edges
The box is cubical, measuring 0.390 m on a side, and the thickness of the walls is 3.00 10-2 m. In one day, 2.90 106 J of heat is conducted through the six walls. Find out the thermal conductivity of the box.
A spaceship moves away from Earth at a speed 0.297 c, Determine the speed of the shuttle relative to Earth
A laser emits a narrow beam of light. The radius of the beam is 8.5 mm, and the power is 1.7 mW. What is the intensity of the laser beam
Two loudspeakers face each other, vibrate in phase and produce identical 416 Hz tones. A listener walks from one speaker toward the other at the constant speed and hears the loudness change.
You are standing 4.5m from a convex security mirror in a store. You estimate the height of your image to be half of your actual height. Estimate the radius of curvature of the mirror
A 0.60 kg body oscillates on a spring that, when extended 1.0 mm from equilibrium, has a restoring force of 7.0 N. find the angular frequency of oscillation
Suppose the tension in a cord is 14.0 N. If the speed of a wave in the cord is 8.50 m/s, then what must be the linear mass density of the cord
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