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A trumpet player standing at rest plays a note of frequency 1200 hertz. An observer in a automobile driving nearby hears a Frequency of 1100 hertz. Determine the speed of the automobile and weather it is driving toward or away from the trumpeter.
What tension in Newtons should a 50cm length of string support in order to whirl an attached 2000g stone in a circular path at 5 m/s.
A rifle is aimed horizontally at a target 50.0 m away, What was the bullet's flight time and What was the bullet's speed as it left the barrel
A loudspeaker of mass 22 {rm kg} is suspended a distance of h = 2 {rm m} below the ceiling by two cables that make equal angles with the ceiling. Each cable has the length of l = 3.90 {rm m}.
How high is the sun above the horizon to a fisherman. What is the coefficient of kinetic friction between tires and pavement.
A 1.6kg , 20-cm-diameter turntable rotates at 50rpm on frictionless bearings. What is the turntable's angular velocity, in rpm, just after this event
A sinusoidal voltage ?v = (75 V) sin (140t) is applied to a series RLC circuit with L = 20 mH, C = 100 ?F, and R = 46 ?. What is the impedance of the circuit
At rest, the car's horn sounds at a frequency of 455 Hz. The horn is sounded while the car is moving down the street. A bicyclist moving in the same direction with one-third the car's speed hears a frequency of 427 Hz. What is speed of the car.
A hammer is hanging by a light rope from the ceiling of a bus. The ceiling of the bus is parallel to the roadway, What is the acceleration of the bus
Two point charges Q1, and Q2 are place exactly on the x axis at -x1. A second particle Q2 is placed at +x2 on the positive x axis. What is the total E field at the origin
A metallic sphere has a charge of +4.2 nC. A negatively charged rod has a charge of -6.0 nC. When the rod touches the sphere, 9.8 109 electrons are transferred. What are the charges of the sphere and the rod now?
A point mass of m1 = 2.3 kg is placed at the origin. Masses m2 = 5.4 kg and m3 = 7.6 kg are placed at 3.5 m and -5.8 m on the x-axis, respectively. Find out the location on the x-axis of the center of mass.
When placed 1.2 m apart, the force each exerts on the other is 12 N and is repulsive. What is the charge on each? What if the force were attractive.
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