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A child is sitting on the outer edge of a merry-go-round that is 18m in diameter. if the merry-go-round makes 5 rev/min, what is the velocity of the child in m/s?
A slide projector needs to create a 98.0cm -high image of a 2.20cm cm -tall slide. The screen is 304cm cm from the slide. What focal length does the lens need
A blue car of length 4.41 m is moving north on a roadway that intersects another perpendicular roadway (see figure below). The width of the intersection from near edge to far edge is 30.0 m.
A 55.5-kg ice skater is moving at 4.08 m/s when she grabs the loose end of a rope, Determine the force exerted by the horizontal rope on her arms
The engineer takes 0.400 seconds to react, and then applies the brakes. At what rate must the passenger train then decelerate in order to avoid a collision?
A destroyer sends a sonar pulse out to detect a submarine directly below the ship in the ocean. If the speed of sound in what is 1517 m/s and it takes 64.13 s for the return pulse to hit the hydrophone on the bottom of the ship, how deep is the su..
An iron disk has a radius of 0.445 m and a mass of 367 kg. The disk is mounted on its axis so that it is free to spin. If the torque is applied at the edge of the disk, how much force is required
What lengths of ship three sides according to the observer
Helium-Neon laser: "Lambda"= 632.8nm. We can observe the first order maximum at "theta"= 25 degrees. What is the second order maximum angle
A small block with mass 0.0450kg slides in a vertical circle of radius 0.600m on the inside of a circular track. How much work was done on the block by friction during the motion of the block from point A to point B
An elevator cable can withstand a maximum tension of 19,500N before breaking. The elevator has a mass of 480 kg and a maximum acceleration of 2.24 m/s2. Engineering safety standards require that the cable tension never exceed two-thirds of the breaki..
250 kg ball is dropped to the floor from a height of 1.0 m and upon rebounding, reaches a height of .60 m. What is the impulse delivered to the ball by the floor?
A 2100 kg truck traveling north at 41 km/h turns east and accelerates to 54 km/h, What is the change in the truck's kinetic energy
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