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(a) Find what frequency is received by a person watching an oncoming ambulance moving at 118 kilometer per hour and emitting a steady 800 Hertz sound from its siren? The speed of sound on this day is 345 m/s.
Hz
(b) Find what frequency does she receive after the ambulance has passed?
An electron traveling at 194 m/s enters a1.1 T magnetic field. The angle betweenthe velocity and the field is 30o. Find the radius of the resulting circular path
A pitcher claims he can throw a baseball with as much momentum as a 4.00 gram bullet moving with a speed of 1200 m/s. Find what must be its speed if the pitcher's claim is valid
A cockroach of mass m lies on the rim of a uniform disk of mass 3 m that can rotate freely about its center like a merry-go-round. find the angular velocity of the cockroach-disk system
A 0.7 kg disk with a rotational inertia given with MR2/2is free to rotate on a fixed horizontal axis suspended from the ceiling. A string is wrapped around the disk and a 2.0 kg mass hangs from the free end. If the string does not slip then as the ma..
1. a converging lens has a focal length of f 23 cm. an object is placed 44 cm from the lens. find the size of the
A solution has a hydronium-ion concentration of 1.0 x 10-5 mol per liter. What is the hydroxide-ion concentration of this solution
Determine the wave speed on the string and determine the speed of sound from the data given.
Suppose the skin temperature of a naked person is 34 °C while the person is standing inside a room whose temperature is 25 °C. The skin area of the individual is 2 m2.
Three moles of ideal gas are in a rigid cubical box with sides of length 0.470m . Part A What is the force that the gas exerts on each of the six sides of the box when the gas temperature is 21.0 deg C? Part B What is the force when the temperature o..
residential building codes typically require the use of 12-gauge copper wire diameter 0.205 cm for wiring receptacles.
A cannonball is shot (from ground level) with an initial horizontal velocity of 34.0 m/s and an initial vertical velocity of 25.0 m/s. find the maximum height the cannonball goes above the ground
A vacuum cleaner is plugged into a 120.0-V socket and uses 3.1 A of current in normal operation when the back emf generated with the electric motor is 77.0 V. Discover the coil resistance of the motor.
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