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A building is being knocked down with a wrecking ball, which is a big metal sphere that swings on a 13-m-long cable. You are (unwisely!) standing directly beneath the point from which the wrecking ball is hung when you notice that the ball has just been released and is swinging directly toward you. How much time do you have to move out of the way? answer in seconds.
Water is flowing in a drainage channel of rectangular cross-section. At one point, the width of the channel is 12 m, the depth of water is 6.0 m, What is the speed of the flow at the second point
A platform is rotating at an angular speed of 2.1 rad/s. A block is resting on this platform at a distance of 0.33 m from the axis. determine the smallest distance from the axis
A whistle of frequency 520 Hz moves in a circle of radius 80.0 cm at an angular speed of 12.0 rad/s. What are the lowest and highest frequencies heard by a listener a long distance away from the whistle and at rest with respect to the center of th..
A 0.36-kg object connected to a light spring with a force constant of 24.4 N/m oscillates on a frictionless horizontal surface. Determine the maximum speed of the object
Two identical coils are parallel to each other on the same axis. Find an expression for the magnetic field strength at the mid-point between the loops
q1. the flywheel of an engine has a moment of inertia 2.80 rm kg cdot rm m 2 about its rotation axis. what is its
Demonstrate that gravitational energy is not extensive: show that the gravitational energy of a sphere of radius 'r' and uniform density varies with volume V^n and find the exponent 'n'.
a proton high above the equator moves straight away from the earth with a speed of 395 ms.a find the acceleration of
A resistance R and a 1.5-H inductance are in series across a 60-Hz ac voltage. What is the ac input voltage
During heavy rain, a rectangular section of a mountainside measuring 2.7 km horizontally, 0.85 km up along the slope, What is the mass of the mud sitting above an area of 4.0 m2 in that section
A high-voltage transmission line with a resistance of 0.31 omegacap.gif/km carries a current of 1010 A. What is the power loss due to resistance in the line
Suppose someone is running towards a siren which is at rest. The siren emits a frequency of 400 Hz. What will the person hear
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