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An 800-N billboard worker stands on a 4.0-mscaffold supported by vertical ropes at each end. If thescaffold weighs 500 N and the worker stands 1.0 m from one end, what is the tension in the rope nearest the worker?
you are on a boat in a fog and know there are cliffs ahead of you somewhere, but you cannot see them. How far away are the cliffs
The temperature of 2.10 kg of water is 34 °C. To cool the water, ice at 0 °C is added to it. The desired final temperature of the water is 11 °C, determine how much mass m of ice should be added.
A ball of mass 0.45 kg is traveling with a velocity of 1.2 m/s north, 2.4 m/s east and 0.6 m/s up. What is the angular momentum of the ball with respect to the point at which the rope is attached to the post
illustrate with a diagram and develop brewsters law from snells law. use air as one medium at what angle of incidence
An alpha particle (q=2e m=4m) exists in a region where the electric field is E=14,000 N/C, find the acceleration of the alpha particle if it is released
A circuit consists of a resistor in series with an inductor and an ac generator that supplies an rms voltage of 115 V. Find the average power dissipated in the circuit
Randomly polarized light of intensity I0 is passed through two polarizers whose transmission axes differ by 45 degrees. What is the intensity of the light
You have a pure (24-karat) gold ring with mass 17.0 g, how many protons are in the ring and what is their total positve charge
A series ac circuit contains a 270-\;{\rm{ }}\Omega resistor, a 10.0-\;{\rm mH} inductor, What is the average power delivered to the resistor, to the capacitor, and to the inductor
if the coefficient of kinetic friction between the 50-kg crate and the ground is .3 determine the distance the crate
A vertical straight wire carrying an upward26-A current exerts an attractive force per unit length of 7.3×10?4N/m, What is the direction of the current in the second wire?
A physics student stands on the edge of a tall building 50.0m high. She throws a ball with a speed of 20.0m/s at an angle of 38.0 degrees above the horizon. how far from the edge of the building (what x) does the ball hit the ground
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