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?
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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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