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A uniform beam of length L = 7.80 m and weight 3.95 102 N is carried by two workers, Sam and Joe, as shown in the figure below. Determine the force that each person exerts on the beam.
The amplitude of the electric field of an electromagnetic wave is 197 V/m.
A high-voltage transmission line with a resistance of 0.30 /km carries a current of 1050 A, What is the power loss due to resistance in the line
You have a mass of 87 kg and are on a 50-degree slope hanging on to a cord with a breaking strength of 221 newtons. Illustrate what must be the coefficient of static friction to 2 decimal places between you and the surface for you to be saved fro..
A runner of mass m = 39kg and running at 3.1m/s runs as shown and jumps on the rim of a playground merry-go-round which has a moment of inertia of 372 kg•m2 and the radius of 2 meters. Assume the merry-go-round is initially at rest, what is its final..
A rollercoaster car has a mass of 600 kg when fully loaded with passengers. what is the force of the track on the car at the top of the hill
What would be the equilibrium temperature when a 253-g block of copper at 281^circ C is placed in a 137g aluminium calorimeter cup containing 817-g of water at 14.5^circ C.
A ladder 6.10 m long leans against the side of a building. If the ladder is inclined at an angle of 76° to the horizontal, what is the horizontal distance from the bottom of ladder to the building.
Suppose an asteroid is found that appears to be heading directly toward Earth (using Earth's location at the time of discovery). It is 4.2 A.U. away (i.e., 4.2 times the Earth-Sun distance), and travelling through the Solar System with a speed of ..
A flint glass plate (n = 1.66) rests on the bottom of an aquarium tank. Calculate the apparent thickness of the plate as viewed from above the water
In the x-y plane, a charge of -4.6uC is on the x-axis at the point (-30cm,0) and a second charge of +7.2uC, Calculate the magnitude and direction of the Electric Force Fe
The electron gun in a TV picture tube accelerates electrons between two parallel plates 1.5cm apart with a 27 kV potential difference between them.
A wire of length L = 15 is bent into a semi circle . If the total charge on the wire is -45nC, determine the electric field at the center point of the semicirlce.
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