What is the hight of the first image
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?
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The 235U fission cross section is 470 b, and the atomic weight of the uranium fuel is 238 g/mol. What is the number density (atoms/m3) of 235U in the reactor?
Assume 200 MeV is released per fission, the 235U fission cross section is 470 b, and the atomic weight of the uranium fuel is 238 g/mol. What is the core average fission rate of the reactor in fissions/s?
Assume 200 MeV is released per fission, the 235U fission cross section is 470 b, and the atomic weight of the uranium fuel is 238 g/mol. What is the value of the core average neutron flux in n/cm2-s?
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?
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.
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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