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At a height of fifteen meters above the surface of a freshwater lake, a sound pulse is generated. The echo from the bottom of the lake returns to the point of origin 0.112 s later. The air and water temperature is 20 °C. How deep is the lake?
A model rocket rises with constant acceleration to a height of 3.8 , at which point its speed is 26 m/s How much time does it take for the rocket to reach this height.
A uniform rod of mass 3.35×10?2kg and length 0.430m rotates in a horizontal plane about a fixed axis through its center, What is the angular speed of the rod after the rings leave it
Two rigid rods are oriented parallel to each other and to the ground. The rods carry the same current in the same direction. The length of each rod is 0.80 m, Determine the current in the rods
A building is being knocked down with a wrecking ball, which is a big metal sphere that swings on a 10-m-long cable. How much time do you have to move out of the way
Considering just the Sun and Jupiter, determine the radius of the circular orbit the Sun makes about the Sun-Jupiter center of mass
In a test laboratory, an electric engine is used to accelerate a wheel from rest. what is the average power output of the engine
What is the longest wavelength of light capable of ionizing a hydrogen atom in the n = 2 state
A uniform solid ball that has a mass of 21.8 g and a radius of 5.1 cm rests on a horizontal surface. What is the angular speed of the ball after impact
Will the car hit the barricade
A child on roller skates undergoes an acceleration of 0.8 m/s2 due to a horizontal net force of 20 N. What is the mass of the child
Calculate g for space shuttle territory. A 7.0×10-2-{rm kg} toy airplane is tied to the ceiling with a string. When the airplane's motor is started, it moves with the constant speed of 1.30 m/s in a horizontal circle of radius 0.47 m.
A 0.200H inductor is connected in series with a 85.0? resistor and an ac source. Derive an expression for the voltage vR across the resistor
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