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Light is reflected from a glass coffee table. When the angle of incidence is 50.0 °, the reflected light is completely polarized parallel to the surface of the glass. What is the index of refraction of the glass?
Cooling water from a river flows through the condenser (the low-temperature heat exchanger) at the rate of 1.2×108L/h (?30 million gallons per hour). If the river water enters the condenser at 18?C, what is its exit temperature
An astronomical telescope uses an eyepiece of power +80.000 D. what is the magnification of the telescope
A Carnot engine whose high-temperature reservoir is at 680K takes in 570J of heat at this temperature in each cycle and gives up 350J to the low-temperature reservoir. What is the temperature of the low-temperature reservoir
A parallel-plate capacitor is formed of two 10 cm x10 cm plates spaced 1.0 cm apart, What is the slowest speed the electron can have if it is to reach the negative plate
What is a density of the block
A turntable that spins at a constant 80 rpm takes 3.70s to reach this angular speed after it is turned on. Find its angular acceleration (in rad/s^{2}), suppose it to be constant, and the number of degrees it turns through while speeding up.
Explain why heat can only be transferred from a hot object to a cold object and not the other way around.
Ball A is attached to one end of a rigid massless rod, while an identical ball B is attached to the center of the rod, Find the tension in each half of the rod
A lawn mower is pushed at constant speed by a horizontl force of 10.0 lbs. determine the work done by the person
A baseball player hits a ball towards the outfield with an initial velocity of 76.0 m/s at an angle of 45 relative to the ground. The outfield is 118 m away and is 4.0 m tall.
Identical objects are located at the same distance from two spherical mirrors, A and B. Find the ratio fA/fB of the focal lengths of the mirrors
What is the area of contact of each tire. find the coefficient of static friction between the car and track from these data.
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