Answer: When sand is added to water it either hangs in the water or forms a layer at the bottom of the container. Sand therefore does not dissolve in water and is insoluble. It is easy to separate sand and water by filtering the mixture. Salt can be separated from a solution through evaporation.
Explanation:
Answer:
Explanation:
The expression for the deBroglie wavelength is:
Where,
is the deBroglie wavelength
h is Planck's constant having value 
m is the mass of electron having value 
v is the speed of electron.
Given that v = 
Applying in the equation as:
I will try my best to sovle this question...
Im Pretty sure it has to be A. it needs to balance it would not stand in place if not balanced.
