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A mass of 50 g rotates on a smooth horizontal plane in a horizontal circle at the end of a string 1 meter long. Calculate the greatest possible speed of the mass given that the maximum tension that the string can withstand is 19.6 N.
A steam catapult launches a jet aircraft from the aircraft carrier John C. Stennis, giving it a speed of 210 mi/h in 3.00 s. Find the average acceleration of the plane
Two particles of masses m and 3m are moving toward each other along the x-axis with the same speed v. Determine the final speed of the heavier object
An object at rest explodes into three pieces of equal masses. One moves east at 23 m/s, while the second piece moves northwest at 14 m/s. Estimate the velocity of the third piece? Suppose each piece has a mass of 2 kg.
A square with sides of length 2m is perpendicular to a magnetic field of strength 10 T, is rotated by 60 degrees in the course of 4s. What is the induced emf in the square
if the potential difference between a cloud and the ground is about 13 mv how much charge is transferred in a lightning
What is the launch speed of a projectile that rises vertically above the Earth to an altitude equal to five before coming to rest momentarily.
q1. a crate of 30.2- tools rests on a horizontal floor. you exert a regularly increasing horizontal push on it and
A 75 g spherical ball rolls without slipping down a ramp that makes an angle of 20 degrees with the horizontal. Find the magnitude and direction of the frictional force on the ball
A semi truck is stopped across a road. As a driver approaches at 20 m/s he sounds the horn of his car (f=350 Hz). find the frequency of the horn heard by the truck driver
A drinking straw 20 cm long and 3 mm in diameter stands vertically in a cup of juice 8.0cm in diameter. A section of straw 6.5cm long extends above the juice. A child sucks on the straw, and the level of juice in the glass begins dropping at 0.23c..
An engine absorbs 1.69 kJ from a hot reservoir at 277°C and expels 1.22 kJ to a cold reservoir at 27°C in each cycle. (a) What is the engine's efficiency? % (b) How much work is done by the engine in each cycle? J (c) What is the power output of the ..
One mole of an ideal gas does 2 600 J of work on its surroundings as it expands isothermally to a final pressure of 1.00 atm, Determine the initial volume of the gas
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