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Standing at a crosswalk, you hear a frequency of 590 Hz from the siren of an approaching ambulance. After the ambulance passes, the observed frequency of the siren is 499 Hz. Determine the ambulance's speed from these observations. (Take the speed of sound to be 343 m/s.)
a cylinder piece of metal .085m tall with a diameter of 3.90 cm has a specific gravity equal to 5.0. What is the mass of the cylinder in units of grams
q1. a parachutist descending at a speed of -13.0 ms loses a shoe at the altitude of 54.0 m.a when does the shoe reach
An archer puts a 0.33 kg arrow to the bowstring. An average force of 183 N is exerted to draw the string back 1.3 m. suppose that air resistance is negligible.
Mass of electron = 9.11 x 10-31 kg, h = 6.626 x 10-34 J.s, c = 3 x 108 m/s; 1 eV = 1.6 x 10-19 J, Mass of a proton or neutron = 1836 x mass of electron, Mass of aluminum atom = 26.9 amu, 1amu = 1.66 x10-27 kg.
Why is the normal force of an object zero at the top of a hill (such as the hill of a roller coaster)? I'm doing a circular motion unit and I found a few problems where this is the case, and I was wondering how it works.
A device uses a Stirling cycle on 391 moles of a monatomic ideal gas between two reservoirs with temperatures of 395 K, How much energy does this device remove from the cold reservoir
Consider two particles, each with a charge of +Q located at the opposite corners of a square of side d. What is the direction of the net electrical field at point P
A 2,493-kg car is moving down a road with a slope (grade) of 14% at a constant speed of 13 m/s. What is the direction and magnitude of the frictional force?
An automatic dryer spins wet clothes at an angular speed of 4.2 rad/s. How long does it take the dryer to come up to speed
An Indy car with a speed of 140 goes around a level, circular track with a radius of 1.50 What is the centripetal acceleration of the car
A ball of mass 5 Kg is freely falling from the roof of a 11 m tall building. What is the impact force when the ball hits the ground
A convex mirror has a focal length of -25.5 cm. Find the magnification produced by the mirror when the object distance is 8.7 cm
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