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A person with perfect pitch sits on a bus bench listening to the 450{\rm Hz} horn of an approaching car. If the person detects a frequency of 475{\rm Hz} , how fast is the car moving? I have answered 19, 19.1, 20, 15.3 and 19.0 all are incorrect.
The pulling force has a magnitude of 81.5 N and is directed at an angle of 30.0° above the horizontal. Identify the coefficient of kinetic friction.
Two point charges and are held in place 4.50 apart. Another point charge -2.5 of mass 6 is initially located 3.00 from each of these charges and released from rest. You observe that the initial acceleration of -2.50 is 354 upward, parallel to the ..
A 12 kg block is moving horizontally across a frictionless surface with a constant velocity of 25 m/s, How far does the block move before it comes to a stop
A certain waffle iron is rated at 0.95 kW when connected to a 120-V source. What current does the waffle iron carry
Compute the distance of two point's p1 and p2 in the x-y plane with the following Cartesian coordinates: p1= (-5m, +8m), p2= (+3m, +2m). Draw the position vectors into appropriate-points.
A Mercedes-Benz 300SL (m = 1750 kg) is parked on a road that rises 10° above the horizontal, What is the static frictional force that the ground exerts on the tires
It takes 2.7×106J of heat to bring a quantity of water from 24?C to a boil. What is the mass of water
You are listening a soft music with a sound level of 50 dB. A subway train passes by whose sound level is 90 dB. What is total intensity level of the combined sound in dB.
administrative expenses are avoidable if product R97C is discontinued. Illustrate what would be the effect on the company's overall net operating income if product R97C were dropped?
Using energy considerations, compute the average force the beam exerts on the pile driver while the pile driver is brought to rest.
While moving down the track at 10.0 m/s, you uniformly accelerate to 27.0 m/s in 10 s. Illustrate what is the average net force that you have applied to the car during the 10 s interval?
A converging lens has a focal length of f = 22.0 cm. An object is placed 41.0 cm from the lens. Find the size of the image in cm if the object has a height of 4 cm. express answer with one decimal place.
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