Ok. This is a chance to show how smart you are. Or how much smarter than I am (most of you).
Isn’t it a miracle that glass is “invisible”? Of course it isn’t! There’s a reason for it.
For the past year or so I’ve often asked myself, isn’t glass solid? Isn’t it made of atoms? Aren’t atoms made of electrons and protons and… stuff? And aren’t all other things made of the same stuff but in different combinations? So why is it that we can see through glass and clear plastic and the like, but we can’t see through other things?
I know, or I think I remember reading or hearing something ages ago that the reason is that the atoms that make up glass are arranged in an angle that allow light to go through, sort of like the sun shining through window blinds. But it would be great if someone would explain it in simple scientific terms so that I, who got the lowest grade in chemistry in high school, can understand.
Second question. How good are your math skills? Mine suck. Help me please:
I exercise on the treadmill half an hour in the morning and half an hour at night. In the morning I walk 5 minutes with the speed set at 3.5 miles an hour. Then I run 10 minutes at 5 miles an hour. Then I walk 5 minutes at 3.5 miles an hour and finally run 10 minutes at 5.5 miles an hour. I repeat the same at night.
How many goddamn miles am I walking and running?!
