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An instrument that uses 589 nanometers light has an antiglare coating of thickness 357 nm on a lens made of glass of index 1.55. Evaluate what the index of the coating, if it is known to be between 1.4 and 1.8.
A closed, stationary, rigid tank contains Refrigerant 134a, initially at 100oC. The refrigerant is cooled until it becomes saturated vapor at 20oC. Determine the initial and the final pressures of the refrigerant and the heat transfer during the proc..
A block is pushed up an incline. The incline creates an angle of 22.0° with the horizontal. When the block is released, it has an initial velocity of 2.75 m/s. The coefficient of kinetic friction between the block and the inclined plane is 0.450. How..
You are riding in an elevator that is traveling down .It travels at vo=6m/s downward. Then, over two seconds, it slows to a stop. What normal force does the person feel as the elevator decelerates? (Mp=75kg) What is the acceleration of the elevator? ..
A wire of radius 0.5 cm carries a current of 150 A that is uniformly distributed over its cross-sectional area. find the magnetic field at the surface of the wire
The mass of the moon is 7.35 x 10^22kg and it radius is 1.74 x10^6m. With what speed should an object be projected from its surface to reach an altitude equal to its radius?
A horse pulls a cart with a force of 61 lb at an angle of 25° above the horizontal and moves along at a speed of 8.5 mi/h. What is the average power (in horsepower, hp) of the force
A horizontal mass-spring system has low friction, spring stiffness 250 N/m, and mass 0.370 kg. The system is released with an initial compression of the spring of 10.8 cm, What is the maximum speed during the motion
A car plus its driver has a mass of 1400 kg. when the driver takes his foot off the accelerator, the car slows from 30 m s^-1 to 20 m s^-1 in 20 s. how much work was done by dissipative forces
A 78-kg person in a moving car stops during a car collision in a distance of 0.78m, Determine the speed of the person before the air bag opens up
The transformer on a utility pole steps the voltage down from 10000 V to 220 V for use in a college science building. At what rate is heat lost in the nonideal transformer
A 3.0 kg block is initially at rest on a horizontal frictionless surface when a horizontal force in the positive direction of an x axis is applied to the block. What is the kinetic energy of the block as it passes through x = 4.3 m
A positive charge of 4 microcoulombs is located at the center of a spherical shell of inner radius 4cm and outer radius 6cm. What is the total charge on the outer shell
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