Lense of a slide project has a focal length
The lense of a slide project has a focal length of 10 cm. It is used to project the image of a 35 mm slide (24 mm x 36 mm) on a square screen located 6m away. Of the following screen width, what is the smallest that would allow the image to fit?
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Suppose that the number of asbestos particles in a sample of 1 squared centimeter of dust is a Poisson random variable with a mean of 1000. What is the probability that 10 squared centimeters of dust contains more than 10010 particles?
Two converging lensees, the first with focal length 25 cm and second with the focal length 20 cm, are separated by 30 cm. A 4 cm tall object is placed 50 cm infront of the first lens. What is the hight of the first image?
A 0.8870 g sample of a mixture of NaCl and KCl is dissolved inwater and treated with excess AgNO3 to yield 1.822 g ofAgCl. Calculate the percent by mass of each compound in the mixture.
Natural boron has a density of 0.128×1024 at/cm3 and a cross section sigma a = 760 b and sigma s = 4 b at an energy of E = 0.025 eV.
If you drop an object from a height of 1.5 m, it will hit the ground in 0.56 s. If you throw a baseball horizontally with an initial speed of 15 m/s from the same height, how long will it take the ball to hit the ground?
A machine used for producing "quarter inch" rivets is to be checked by taking a random sample of 10 rivets and measuring their diameters. It is feared that the wear-off factor of the machinewill cause it to produce rivets with diameters less than
A reactor that has a thermal efficiency of 32% is rated at 900 MWe. If the reactor operated at 80% full power for 400 days, what is the decay heat (in MW) 120 s after shutdown?
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