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Two waves A and B, both of wavelength λ = 30.8-cm, are initially out of phase by π. I want to bring them back in phase by placing some mirrors along the path of wave B as shown in the figure. What is the minimum spacing L required to achieve this?
A 1.2 kg particle moves from an initial position r1 = 4i - 2j + 3k m to a final position r2 = 7i - 3j -4k m while a force F = 6i - 4j + 2k N acts on it. What is the work done by the force on the particle
A train moves due north at a rate of 9.6933 m/s relative to the ground. what is the magnitude of the ball's speed as measured by an observer on the ground
The roller coaster in the figure below starts with a velocity of16m/s.One of the riders is a small girl of mass 27kg.Find her apparent weight when the roller coaster is at locationsBandC. At these two locations, the track is circular, with the radi..
What is the magnitude of buoyancy force ?
A 17 cm radius air duct is used to replenish the air of a room9.2 m x 5.0 m x 4.5 m every ten minutes. How fast does the air flowing the duct
A car starting from rest acquired a velocity of 30 m/s during a time period of 5 seconds. Determine the magnitude of acceleration of car
a detector of a fixed size measures the intensity of light emitted from two different sources. one emits spherical
A 121-kg horizontal platform is a uniform disk of radius 1.63 m and can rotate about the vertical axis through its center. Find the moment of inertia of this system
A car travels at a constant speed around a circular track whoseradius is 3.26 km. The car goes once around the track in 253 s.What is the magnitude of the centripetal acceleration of the car?
A 2.00 kg sphere is rotating about an axis through its center at 40.0 rev/s with the angular velocity in the +z direction. find the rate of change of the angular momentum of the sphere
Two identical objects each hold a net charge of q = 2e. If the gravitational force among the two objects exactly cancels the electrostatic force among the objects, what is the mass of each object?
Two identical iron balls are 1 meter apart from each other. The volume of the balls is 1 cm3. What is the magnitude of the gravitional force
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