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A bat at flying east at 30 m/s sends out ultrasonic waves at 60kHz and receives them returned from an object moving east at 35.0 m/s Assume the speed of sound in air is 343 m/s
1. What is the sound frequency as heard by the easterly moving object?
2. What is the sound frequency of the reflected wave as heard by bat?
The acceleration of a particle is given by ax(t)=? 2.10m/s2 +( 3.03m/s3 )t, What will be the velocity at time t = 3.94s
A point charge with q1 = +1.9 C is located at x = ?3.0 m, y = 0, and a second point charge with q2 = +6.5 C is at x = +1.0 m, y = +2.0 m. (a) What is the force exerted by q1 on q2? magnitude N direction ° counterclockwise from the +x-axis (b) What..
The contacts worn by a farsighted person allow her to see objects clearly that are as close as 25.0 cm, even though her uncorrected near point is 84.0 cm from her eyes, How far away is the poster actually located
An infinitely long line of charge has a linear charge density of 6.00×10?12C/m . A proton is at distance 14.5cm from the line, How close does the proton get to the line of charge
Two point charges are fixed to rectangular coordinate system, Charges of q1 = 3.5uC and q2 = -15 uChave coordinates (0.55,0) and (0,0) in meters respectively
Determine out the greatest possible angular speed it can have for the matter at the surface of the star on its equator to be just held in orbit by the gravitational force.
A 5.8 box is on a frictionless 39 slope and is connected via a massless string over a massless, frictionless pulley to a hanging 1.9 weight. Illustrate what is the tension in the string once the box begins to move?
The arrangement is, in effect, a hollow tube of current 2.1A. find the magnetic field outside the cylinder
A 0.658-nm photon collides with a stationary electron. After the collision, Find the momentum of the electron
A stick is resting on a concrete step with 1/4 of its length hanging over the edge. what is the magnitude of the angular acceleration of the stick at the instant shown
(a) Calculate the number of electrons in a small, electrically neutral silver pin that has a mass of 12.0 g. Silver has 47 electrons per atom, and its molar mass is 107.87 g/mole. (b) Imagine adding electrons to the pin until the negative charge h..
A golfer hits a shot to a green that is elevated 3.20 m above the point where the ball is struck. find the speed of the ball just before it lands
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