Determine an estimate for the wavelength of a fastball thrown by a major league

Question

Determine an estimate for the wavelength of a fastball thrown by a major league baseball pitcher. Estimate the speed of the baseball. (Take the mass of the baseball to be 0.142 kg.) m/s Calculate the the wavelength of a fastball thrown by a major league baseball pitcher. (Use your estimate.) m A stream of neutrons moves with a speed of 1.41 times 10^3 m/s and is incident on two rows of atoms within a diffraction as they pass between the rows of atoms. What is the width of the central bright region on a screen m

Explanation / Answer

7. Average speed of a fast baseball pitcher is about

v = 44 m/s

now, mass of baseball, m = 0.142 kg

so associated de broglie wavelength is lambda = h/mv

h -> planks constnat

lambda = 6.63*10^-34/0.142*44 = 1.06113*10^-34 m

so, asusmed speed of the baseball pitcher, v = 44 m/s

calculated wavelength of the baseball pitcher as per the assumption = lambda = 1.06113*10^-34 m

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