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You use a sequence of ideal polarizing filters, each with its axis making the same angle with the axis of the previous filter, to rotate the plane of polarization of a polarized light beam by a total of 45.0°. You wish to have an intensity reduction no larger than 14.4%.
(a) How many polarizers do you need to achieve your goal? ........... (b) What is the angle between adjacent polarizers? .......... °
A photographer uses his camera, whose lens has a 70mm focal length, to focus on an object 4.5m away. In which direction must the lens move to focus on this second object
what types of everyday materials have properties of both solids and liquids?what solids may be mistaken for liquids and
A uniform magnetic field is at right angles to the plane of a wire loop. The field decreases by 0.16Tin 3.0×10?3s and the magnitude of the average emf induced in the loop is 82V, What is the area of the loop
A light ray travels inside a large glass block and approached the glass-air interface at some angle relative to the normal (perpendicular to the surface). After entering the air, the light ray's
you take a 100 g uniform meter stick and hang 200 g on the 10 cm mark, where should you clamp the meter stick so that it is in balanace
Peter and Carter are dropping rocks into a stream from a bridge at a height of 28 m above the water below, As Meg emerges from the water below she is struck by both rocks. Calculate the speed of each rock at impact with Meg
Listed below are the forces that were applied to the cart in these three runs. Run Force (N) Run = 1(diamonds), Use Newton's second law to estimate the mass of the cart in kg from this set of data
Two identical speakers are separated by 3.4m and produce sound of different frequencies equally in all direction. Determine the sound level in decibels at the point that is a midway between the speakers
A vessel which contains an ice-water mixture at 0C is in thermal contact with a water-steam mixture at 100 C. What is the change in the entropy of the water-steam mixture at 100C
you ar charged to work on reducing expenditures for a company.you think that the company can save considerable money on fuel costs by lowering the room temperature of the building for daily use, How much heat will be saved each morning
On a cold day, 16000 J of heat leaks out of a house. The inside temperature is 20.0° C, and the outside temperature is -18° C. What is the increase in the entropy of the universe that this heat loss produces?
A playground merry-go-round has a disk-shaped platform that rotates with negligible friction about a vertical axis. how fast will the disk be turning
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