4-14

Hello physics class. Today, Tuesday April 14th, was the first day of our new unit, Unit 10- Waves. On our way into class we picked up 3 pages.

Mr. Manning then proceeded to remind us that our sketch and description for our roller coasters are due Friday or earlier. If you hand it in early, or if you hand it in on Friday, Mr. Manning will grade it and return it to you in one day. Speedy.

Mr. Manning then commented on one of the papers we picked up, the Unit 10 reading guide. He said that we don’t have to do the entire packet- we only have to do five of the seven sections. You can pick which five you want.

Then we discussed how energy is transferred. We already know about one way energy is transferred, which is “moving mass”. But the way that energy is transferred that we are going to learn about is “waves”.

Then we moved onto the main activity for today using one of the papers we picked up on the way into class and a website. The link for the website can be found on the Physics moodle page- the twelfth box down which says Unit 10- Waves and is titled, “Monterey Institute”. On this website you only need to watch sections 1, 2, and 3.

Before we got the laptops to begin this activity Mr. Manning helped us out with a few of the answers for the worksheet that the Monterey Institute does not provide us with.

Number 3 letter b is multiple pulses.

Monterey Institue only gives us two types of waves, so the 3rd one, (number 4 letter c) is matter. Number 5 letter a is also matter.

Number 6 letter c is surface (it’s a combination of a and b). Number 7 letter c is also surface.

After everyone went through lessons 1, 2, and 3 on the website and completed the worksheet we returned to our seats and focused our attention too the omnipotent smart board, where a diagram was displayed. Pictured below is what the diagram looked like. Then Mr. Manning showed us a demonstration with a long slinky that hung parallel to the ceiling. First he showed a transverse wave by flicking one end of the slinky perpendicularly. This horizontal flick caused the slinky to make vertical waves. The second demonstration was of a longitudinal wave, which he showed by compressing a few of the rings of the slinky at one end of the slinky and then releasing.

Then he told us of how the third type of wave, surface wave, is when something is dropped in a pond, for example, and then circular ripples ripple away from the center. Another example of a surface wave is an earthquake.

On the white board there was a notice that there is a quiz on waves on Thursday. Yayyy.