Bill Nye the science guy video notes

Sometimes earth quakes go up and down or back and forth. The earth is flowting on molten liquid rock. Every one feels earthquakes. The earthquake might be small or big but mostly we always feel it. The center of an earthquake it called the Epicenter. 

                                         Science wave lab

Problem: What floating object can move the fastest on a low frequency or on a high frequency?

Materials:

·       Water

·       Ping pong ball

·       Cork

·       Small Styrofoam ball

·       Ruler

·       Small see through aquarium

·       Clay 

PROCEDURE

1. 1.   Fill the aquarium with water 1.5 inches.

2. 2.   Tape a ruler in the front

3. 3.  Get the materials

4. 3.   Have a stop whatch to see how long it takes the material to move 10 cm.

5. 4.   Write down your data 

6. 5.   Use the clay to make a disturbance/waves for the object to move.

7. 6.   Check with the stopwathch how long it takes for the object to move 10 cm

Data

Cork-   Low frequency: 49.6 sec

             High frequency: 11.5 sec

Ping pong ball- Low frequency: 19.2 sec

                            High frequency: 3.4 sec

Small Styrofoam- Low frequency: 31.9 sec

                         High frequency: 2.0 sec

	Cork	Ping Pong Ball	Small Styrofoam Ball
low frequency	49.6	19.2	31.9
High frequency	11.5	3.4	2

Data Analysis:  The cork was the heaviest of all, so it moved the slowest, the ping pong ball was almost the same as the small Styrofoam ball.

Conclusion: I kind of knew that the small Styrofoam ball would have moved the fastest on high frequency, but I didn’t expect the ping pong ball to move the fastest in low frequency. The Styrofoam ball is the lightest of all three objects the second lightest was the ping pong ball, and the cork was the heaviest of all. 

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.