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An ambulance with a siren emitting a whine at 1530 Hz overtakes and passes a cyclist pedaling a bike at 2.55 m/s. After being passed, the cyclist hears a frequency of 1522 Hz. How fast is the ambulance moving? (Take the speed of sound in air to be 343 m/s.)
A 0.760 m long brass pendulum experiences a 21.0°C temperature increase. What is the change in the period
Gas is contained in a 6.00-L vessel at a temperature of 21.0°C and a pressure of 8.00 atm. Determine the number of moles of gas in the vessel
A magnifier has a magnification of 8 times. How far from the lens should an object be placed so that its (virtual) image is at the near-point distance of 25 {rm cm}.
A car of mass 3 x 10^3 kg moving with a velocity of 20 m.s-1 is passing a truck of mass 7.5 x 10^3 traveling at a speed of 16 m.s-1. what is the velocity of the center of mass of the system?
Explain the physics fundamental process that causes the scope ,rod, pith ball, etc to discharge when you touch it. what is conservative force according to the text book of Giancoli
A wedge of mass m=36.1 kg is located on a plane that is inclined by an angle ?=21.3 degrees with respect to the horizontal. A force F=302.3 N in the horizontal direction pushes on the wedge. The coefficient of kinetic friction between the wedge and t..
A 3000 pound car crashes into a concrete jersey barrier moving 3 sections (totaling 12,000 pounds) laterally 24 inches. How fast was the car going on impact.
A bullet shot straight up into the air returns to it's starting point in 10 seconds. What is the initial speed of the bullet
A transformer on a pole near a factory steps the voltage down from 3600 V (rms) to 120 V (rms). The transformer is to deliver 2000 kW to the factory at 95% efficiency. Find values for the the power delivered to the primary
question1the index of refraction for red light in water is 1.331 and that for blue light is 1.340. if a ray of white
A 5.0 kg hanging weight is connected by a string over a pulley to a 9.0kg block sliding on a flat table. If the coefficient of sliding friction is 0.20; what is the rate of acceleration of the system?
A 1700 kg car travelling at a speed of 15m/s skids to a halt on wet concrete where f_k =.5. How long is the cars skid marks.
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