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A referee's whistle operates at 800Hz.
(a) What is the frequency you hear when she is running toward you on the court at 5 m/s?
(b) What is the frequency you hear if you run away from her at the same speed (you are both running!) Assume vel of sound to be 344 m/s?
q1. a 75-kg person sits on a 3.7-kg chair. each leg of the chair makes contact with the floor in a circle that is 1.5
when an object is dropped from a height of 20.0m above the surface of planet B, what is the acceleration of a falling object close to this planet
At a soft drink bottling plant, a horizontal section of pipe carrying citric acid in liquid form goes from a cross-sectional area of 8.00 cm2, determine the liquid flow speed and the liquid pressure
The wavelength of a spectral line measured to he lambda on I Earth is found to increase by 50% on a far distant galaxy. What is the speed of the galaxy relative to earth?
When a 5.5 cm long pencil is arranged perpendicular to a convex mirror's optical axis at a distance of 29 cm from the mirror, its image is 2.8 cm tall.
An object of mass M = 3.5 kg slides from rest a distance d = 6 m down a frictionless inclined plane where it encounters a spring. When the block just touches the spring, how much gravitational potential energy has it lost
A 55-kg mass ice skater standing stationary on very slipper ice (negligible friction) throws a 0.45 kg baseball with a speed of 27 m/s in the horizonatal direction
Use Excel spreadsheet to computer the frequency response (gain and phase) of the above transfer function over the frequency range between 0.01Hz to 10 Hz.
A typical coal-fired power plant burns 310 metric tons of coalevery hour to generate 780MW of electricity. 1metricton=1000kg. What is the power plant's thermal efficiency
How far does the car go before it stops. A car traveling at 50m/s runs out of gas while traveling up a 30 degree slope. how long will it travel before it rolls back down.
Suppose that after a centrifuge in a medical laboratory is turned off, it continues to rotate with a constant angular deceleration for 10.40 s before coming to rest. How numerous revolutions did the centrifuge complete after being turned off.
Suppose you want to run some apparatus that is 85 from an electric outlet. What voltage will be applied to your apparatus
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