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A transparent material X is submerged in water (n = 1.33). It is observed that a light ray travelling in X at angle of 50o to the normal is totally reflected at the X-water interface. What is the minimum index of refraction of X?
An AC voltage source, with a peak output of 120V, results in dissipation of energy in a resistor at rate of 100W. What is the value of the resistance
What is the time constant of a 9.50 thick membrane surrounding a 4.0×10-2 diameter spherical cell? Suppose the resistivity of the cell membrane as and the dielectric constant is approximately 9.00.
Light rays in a material with index of refrection 1.25 can undergo total internal reflection, Find this material's index of refraction when the required critical angle is 67.9°
Two spaceships are launched from the Earth in opposite directions. All moves with the speed of .75c relative to the Earth. As we see it, what is the speed by which the distance among the spaceships increases? Does this contradict the special relativi..
q1. a 2.66 kg block is pushed along a horizontal floor by force p 138n directed at an angle theta24.8 degrees below
A laborer pushes a wheelbarrow weighing 200 N at 25.0° above the horizontal. If he pushes it a distance of 25.0 m, How much work is done
A chipmunk scampers about collecting in its cheeks safflower seeds that the birds dropped from the feeder hanging overhead. Initially the little creature is at position vector r1x = 2.45 m and r1y = -2.13 m. After filling up, it runs to the hole a..
A prospector finds a solid rock composed of granite (? = 2650 kg/m3) and gold. What percentage of the rock is gold by volume
If N is 25mm, the focal length of a certain microscope's eyepiece is 12.5 mm and the magnification of its objective lens is 50, what is the overall magnification of the microscope
a piece of paper is folded into three equal parts.a how many area vectors are needed to describe the surface of the
A pendulum 2 meters long is positioned so that the pendulum bob is at the focus of a concave mirror when the bob is at rest. The bob is then displaced halfway to the mirror and released. When will the pendulum bob produce a real image in the mirror? ..
A 170 object is taken to a height of 360 above the Earth's surface. What is the object's weight at this height
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