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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?
A person weighs 75 N on the surface of the moon and 427 N on the surface of the Earth. What is the acceleration of gravity on the surface of the moon
A 2.00×10-2- cube of ice at an initial temperature of -19 is placed in 0.670 of water at 44.0 in an insulated container of negligible mass.
An electron is released from rest at the negative plate of a parallel plate capacitor. How fast is the electron moving just before it reaches the positive plate
three charges q1 1.98 10-9 c q2 -3.15 10-9 c and q3 1.06 10-9 c are located on the x-axis at x1 0 x2 10.0 cm and
A hollow cone (like a party hat) has vertex angle 2?, slant height L, and surface charge density ?. It spins around its symmetry axis with angular frequency ?. What is the magnetic field at the ti
One possibility for a low-pollution automobile is for it to use energy stored in a heavy rotating flywheel. What is the angular velocity of the flywheel when it has a full "energy charge"
A bullet moving horizontally with a speed of 500m/s strikes a sandbag and penetrates a distance of 10.0 cm. What is the average acceleration , in m/s^2, of the bullet
A weight lifter raises a 1093 N weight a vertical distance of 1.60 m in a time interval of 2.05 s. Compute the power provided by the weight lifter's force
Gas is confined in a tank at a pressure of 12.6 atm and a temperature of 23.0°C. what is the pressure of the gas remaining in the tank
At the low point in it swing, a pendulum bob with a mass of 0.46 kg has a velocity of 2.2 m/s. What is its kinetic energy at the low point
imagine someone drops an apple from a vertical distance.
A tire of an automobile has a gauge pressure of 30 psi at the top of a mountain, and the air temperature inside the tire is 300K. The atmospheric pressure at the top of the mountain is 1.7 atm.
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