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An airplane traveling at v = 180 m/s emits a sound of frequency 5.70 kHz. At what frequency does a stationary listener hear the sound during each of the following times? (Use 344 m/s as the speed of sound.)
(a) as the plane approaches
(b) after it passes
What is the energy density in the electric field at the surface of a 2.00-cm-diameter sphere charged to a potential of 2000V
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q1. a basketball player achieves a hang time of .658 s in dunking the ball. what vertical height will he attain? the
A bullet of mass 10g and speed 500 m/s is fiered into a door and gets embeded exactly at the centre of the door, Calculate the angular speed of the door just after the bullet embeds into it
On a workday, the average decibel level of a busy street is79dB with 100 cars passing a given point every minute. what is the decibel level of the street
A certain kind of glass has an index of refraction of 1.650 for blue light of wavelength 420 nm and an index of 1.615for red light of wavelength 670 nm. If abeam containing these two colors is incident at an angle of30.0° on a piece of this glass, wh..
A child of mass m rides on a Ferris wheel . The child moves in a vertical circle of radius13.8 m at a constant speed of 3.30 m/s. Calculate the magnitude of the force on the child
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you are driving at a constant speednbspon a straight highway that passes under an overpass. at time whennbspyour car
a rocket is fired vertically from the surface of the earth. its engines fire only briefly and then the rocket
A(n) 331 g object is attached to a spring and executes simple harmonic motion with a period of 0.294 s. The total energy of the system is 1.7J. Find the force constant of the spring. (N/m) Find the amplitude of the motion (in cm)
initially a yoga ball is partially blown up and its surface area measured. afterwards it is filled completely and its
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