wave lab question

What happens to a wave as it hits a surface it cannot pass through?


The wave reflects, so some times the speed of the wave can change the angel.


Does energy affect the waves path?

sometimes yes and sometimes not, it actually depends on the weight or the size of the object that is causing the disturbance of the wave.

How is the angle at which the ball hits the wall related to the angle it bounces back?

Its not really related on the angle that it bounces back because the angle is formed by the size and weight of the object, and it depends on the angle, if the angle is straight it will just bounce right back straight.

Wave lab blog post

How do waves interact in a tub of water with: no barriers, one barrier, 2 barriers?

No Barriers


In the tub with no barriers, the first one there are 2 waves. When the 2 waves meat they just go right through each other, but if you are making a wave from one side stronger than the other one, the stronger one would eventually just go right through. In the second one, it's just the same, but the disturbance is being caused in other directions. In the last one, the disturbance is being caused in the middle of the tub. That means that no matter what, the waves will travel in all directions.


1 Barrier


In the first picture with one barrier the tub is being shacked, from one side to the other. The water is bouncing on the barrier from one side to the other. The water that isn't blocked is just going from one side to the other, and then makes a slight bend. In the second one the water just bounces of again, but the water that bounced on the barrier first is ahead of the other part of water. The last one is just the same a the first just in a different position.


2 Barriers


In the first picture there are two barriers. the water in the middle just goes right through, and the water by the barriers just keep's bouncing off. In the second picture the barriers are forming a square. There is no movement  in there because the waves caused by a disturbance can not get in. In the last picture of all, it's mostly just the same like the first one with 2 barriers. 

Relection on unit

What makes plastic green?

Green plastic is usually made from corn, sugar beet, and sugar corn. This is what makes plastic green. The problem with packaging that there are so many things in it witch are not needed. A lot of this is waste. At the same time this is mostly recycled or made out of recycled material witch is good. Paper i thick is the most easy to recycle. Metal is hard but could be recycled. to improve packaging i wouldn't put so many materials in the package, if its really necessary i would make the materials out of recycled material.

Food inc reflection

In the movie it showed a lot of affective pictures. What really affected me is how they where treating the animals. After i watched the movie i thought of never eating meat again but every one needs to eat meat because of the the germs that help us grow and survive also the nutrients that the meat has. I really liked the interview of the lady who lost her 2 year old son. He dyed because the hamburgers that he ate had ecolyve in them and because he was so young he was unable to fight it off.

    

current event #2

STEM CELLS CREATE MIGHty mice 

Stem cell injections boosted the leg muscles of mice and warded off the typical loss of muscle mass that comes with aging. The discovery could be useful in treating humans with degenerative diseases such as muscular dystrophy, as well as help everyday people prevent at least some of the ravages of time, the researchers said. Scientists removed stem cells from the legs of three-month-old healthy mice and injected them into the legs of mice that had temporary leg muscle injuries, induced by barium chloride injections. The technique repaired the injuries within days and made the treated muscle double in size. 

current event #1

Is it possible to travel to another star?


It would take over 70,000 years. The problem comes with how we can shrink those travel times.
One way to travel to another star is to catch a ride on waves from our own sun. As laid out by solar sail pioneer Gregory Matloff, photons from the sun could push against lightweight, reflective sails to propel a spacecraft. Other theoretical models of sail-based interstellar propulsion systems call
for a magnetic bubble instead of a physical sail. By tethering the bubble to a spacecraft and lining it up with a particle beam, scientists could propel a probe up to considerable speeds.