Hon Chemistry 10-31-17 Mass to Moles to Molecules

HON CHEMISTRY: So what do you think is the mass of a mole of skittles? Awesome job today using a chemical formula as a tool!

It turns out there are tons of ways that you can use a chemical formula! Like finding molar mass, moles, and maybe how many skittles are in a mole of skittles? Let’s practice it tomorrow!

P. S. Did you realize how super important it’s going to be for you to be able to correctly write chemical formulas (and memorize all that formula stuff)?!?

flickr photo by A Elizabeth

Physics 10-31-17 Friction & Normal Force

PHYSICS: Why don’t things that are moving just keep moving? Here is our intro on friction from today.

Remember a few key things. One of the most important – net forces produce acceleration.

You can find Ff a couple of different ways – it’ll be part of a net force equation and can be found from the coefficient of friction equation. If and ONLY if your object is moving at a constant velocity, Ff will equal Fa. Fn is only sometimes equal to Fw. If your object is pulled at any angle (or pushed), Fn will be a part of Fnet in the vertical direction.

Whew! ๐Ÿ™‚

flickr photo by kbaird