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You are driving north on 107th Avenue at a speed of 29.2 mph. A police car whose siren produces a sound at a frequency of 549 Hz is approaching from the opposite direction at a speed of 55.9 mph. At what frequency do you year the siren?
a spaceship approaches an asteroid and sends out a radio signal with proper frequency 6.5 x 109 hz. the signal bounces
An object is placed 15 cm from a converging lens with a 5.0-diopter refractive power. At what distance from the object will the image be located
An ambulance moving at 42 m/s sounds its siren whose frequency is 450 Hz. a car is moving in the same direction as the ambulance at 25 m/s. what frequency does a person in the car hear as the car approaches the ambulance? After the ambulance passe..
the drawing shows an edge-on view of two planar surfaces that intersect and are mutually perpendicular. surface 1 has
An elevator and its load have a combined mass of 1600 kg. Find the tension in the supporting cable when the elevator, originally moving downward at 12 m/s, is brought to rest with constant acceleration in a distance of 28 m.
A 3-kg block is pulled along a FRICTIONLESS surface with a force of 42N. What is the force exerted on the 2-kg block by the 1-kg block
A 20.0-kg box rests on a horizontal surface. The coefficient of static and kinetic friction between the box and the surface are 0.30 and 0.10 respectively. what is the friction force between the box and the surface
The fan blades on a jet engine make one thousand revolutions in a time of 76.5 ms, What is the angular frequency of the blades
A thin spherical shell of mass 0.450 kg and diameter 0.210 m is filled with alcohol ( = 806kg/m3). Find the acceleration of the alcohol filled shell asit rises toward the surface of the water
A long straight wire is aligned north-south and carries current in the northerly direction. What is the direction of the magnetic field created directly above the wire
A 3.9×10-24-kg particle is vibrating with simple harmonic motion with a period of 1.8×10-5 s and a maximum speed of 1.70×103 m/s. Find the maximum displacement of the particle
Because of the cramped space under the hood, you'll need to pull at an angle of 105 with respect to the wrench shaft. Illustrate with what force must you pull?
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