Question

A baseball must weigh between 5.00 and 5.25 ounces (1 ounce= 28.3g). What is the wavelength of a 5.15 ounce baseball at 92mph?

Answer 1

Well, I will do it for a cricket ball...the which has a mass of `160*g`..and the fastest delivery is approx. `160*km*h^-1`

Explanation:

The de Broglie equation holds that `lambda=h/(mv)`...where `h="Planck's constant"` `6.626xx10^-24*J*s^-1`

And so we take the quotient....

`lambda_"cricket ball"=(6.626xx10^-24*J*s^-1)/(0.160*kgxx44.4*m*s^-1)=9.33xx10^-25*m`

And so I would not expect much quantum behaviour on the cricket pitch. Which is a good thing, because I have never been much of a batsman....