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Three equal point charges (+2.0 nC) are located at the corners of an equilateral triangle with sides of 2 meter length. If the electric potential is taken to be zero at infinity, find the potential at the midpoint of any one of the sides of triangle?
An airplane propeller is 2.38m in length (from tip to tip) and has a mass of 117kg. What is the angular acceleration of the propeller
an apple weighs 1.01n . when you hang it from the end of a long spring of force constant 1.41nm and negligible mass it
A wheel initially has an angular velocity of 18 rad/s. It has a constant angular acceleration of 2.0 rad/s2 and is slowing at first. What time elapses before its angular velocity is18 rad/s in the direction opposite to its initial angular velocity
A compound lens system consists of two converging lenses, one at x = -20.0 cm with focal length f_1= 10.0 cm, and the other at x= 20.0cm with focal length f_2 = 8.0 cm. What is the focal length of the new lens at the origin
Copper and aluminum are being considered for a high-voltage transmission line that must carry a current of 54 A. The resistance per unit length is to be 0.140 Ω/km. Compute for each choice of cable material the currentdensity.
A thick walled steel cylinder used for storing compressed air is fitted with a safety valve which lifts at a pressure of 1.0 x 10^6M/m2. At what temp will the valve lift
Blocks A (mass 4.50 ) and B (mass 13.00 ) move on a frictionless, horizontal surface. Initially, block B is at rest and block A is moving toward it at 7.00. Find the velocity of each block after they have moved apart
On a distant planet, golf is just as popular as it is on earth. Agolfer tees off and drives the ball 3.10 times as far as he wouldhave on earth, given the same initial velocities on both planets.The ball is launched at a speed of 41.8 m/s at an an..
A simple pendulum consists of a 4kg mass attached to a 3m long rope. At t=0 it is moving to the right at 0.4m/s. What is the angular frequency of the oscillation
In a photoelectric experiment, light with a wavelength of 250 nm hits a certain material. When a negative potential of 0.48 volt is applied there is no more current while a saturation current Is is recorded at positive voltages.
A dolphin leaps out of the water at an angle of 36.1 ° above the horizontal. Find the magnitude of the vertical component of the velocity
In a pairs figure skating competition, a 65 kg man and his 45 kg female partner stand facing each other on skates on the ice. what is the velocity of her partner
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