Answer:
if its a multiple question answer its hydroden and carbon
if not its carbon
1) you want to increase friction when it gets cold. If you're outside and it's really cold, you're going to rub your hands to warm them up, therefore friction is increasing
I'm not do sure about decreasing.
Yes thats true! You always have to think about the question or project before you start a science experiment! :)
Iron and chlorine
For every iron there are 3 chlorine.
