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Question 1- An illuminated test object is placed on an optical bench and a screen is placed 60 cm away. A converging lens is placed between the two, and a sharp image is formed on the screen when the lens is 20 cm away from the object.
Part A- What is the focal length of the lens?
Part B- Calculate the angular size in radians, and in degrees, of a dime at a distance of 5 meters.
You need help to illuminate the answer of the above question.
A baking dish is removed from a hot oven and placed on a cooling rack. As the dish cools down to 30.0°C from 196°C, What was the net radiant power of the baking dish
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a piano string is under a tension of t 778n. when struck the wave has a period of t 0.6ms and a wavelength of
According to the Guinness Book of World Records, the longest home run ever measured was hit by Roy Dizzy Carlyle in a minor league game. what did the initial speed of the ball need to be to produce such a home run
A uniform disk turns at 4.3 around a frictionless spindle. A nonrotating rod, of the same mass as the disk and length equal to the disk's diameter, is dropped onto the freely spinning disk.
A spherical balloon is made from a material whose mass is 3.86 kg. The thickness of the material is negligible compared to the 2.16-m radius of the balloon. Find the absolute pressure of the helium gas
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question1in an xray tube electrons are accelerated in a uniform electric field and then strike a metal target. assume
The magnetic field of an electromagnetic wave in a vacuum is Bz = ( 3.5 muT) sin ( 1.6×10^7 x - 2pi f t) , What is the wave's electric field amplitude
The Syncom communication satellite was placed in its high-altitude geosynchronous orbit of radius 4.23 x 10^7m in two steps. What is the increase of total mechanical energy during this change of orbit
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