Answer:
![4.2\cdot 10^{-32} m](https://tex.z-dn.net/?f=4.2%5Ccdot%2010%5E%7B-32%7D%20m)
Explanation:
The De Broglie's wavelength of an object is given by:
![\lambda=\frac{h}{mv}](https://tex.z-dn.net/?f=%5Clambda%3D%5Cfrac%7Bh%7D%7Bmv%7D)
where
h is the Planck constant
m is the mass of the object
v is the speed of the object
In this problem, we have:
is the mass of the pellet
is the speed of the pellet
Substituting into the equation, we find the wavelength of the pellet:
![\lambda=\frac{6.63\cdot 10^{-34} Js}{(3.5\cdot 10^{-4}kg)(45 m/s)}=4.2\cdot 10^{-32} m](https://tex.z-dn.net/?f=%5Clambda%3D%5Cfrac%7B6.63%5Ccdot%2010%5E%7B-34%7D%20Js%7D%7B%283.5%5Ccdot%2010%5E%7B-4%7Dkg%29%2845%20m%2Fs%29%7D%3D4.2%5Ccdot%2010%5E%7B-32%7D%20m)
Ice, when matter is solid particles are closer together.
1) The minute travels the circumference of a 4 inches circle is 60 minutes:
Circumference = 2πr = 2π(2in) = 4π in
Time = 60 minutes
2) Constant angular velocity => (4π / 60) = (x / 20) => x = 4π / 3 inches
x = 4.19 inches
Answer: 4.19 inches
All of them will have the same density