Problem on collision between a hammer and a nail
The collision between a hammer and a nail can be considered to be approximately elastic. Estimate the kinetic energy acquired by a 14 g nail when it is struck by a 550 g hammer moving with an initial speed of 5.1 m/s.
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Two nanowires are separated by 1.2 nm as measured by STM. Inside the wires the potential energy is zero, but between the wires the potential energy is greater than the electron's energy by only 1.4 eV. Estimate the probability that the electron pa
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How many wayss are there to select an unordered group of eight numbers between 1 and 25 inclusive with repetition? In what what fraction of these ways is the sum of these numebrs even?
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