Sound
True or False: Sound is a form of energy.
True
Name two ways that you can store energy in something that we have talked about?
1. Put energy in to wind something up
2. Put something up high to give it height energy
What is a collision?
A moment when two things hit each other and energy gets transferred from one to the other.
Why can you not hear sound in space?
There is no material for the vibrations to travel through in order to reach your ear.
What pattern do you notice about the height of where the black marble is released? (see picture)
a. When the black marble is released from a higher point, it moves faster.
b. When the black marble is released from a lower point, it moves faster.
c. The height of the black marble has no effect on how fast it moves
A. When the black marble is released from a higher point, it moves faster.
Why do we hear a sound at the moment a collision happens?
Some of the energy from the first object gets transferred to the air around it, causing air particles to vibrate. These vibrations reach our ears, and we hear it as a sound.
What is happening at each spot on the paper cup telephone to allow it to work? (see picture)
When you talk into the first cup, your voice produces vibrations that make the cup vibrate. Those vibrations get transferred through the string. This causes the other cup to vibrate, and the person on the other end can hear those vibrations as sound.
If you were to wind up a thin rubber band a different amount of turns and test the speed at which it unwinds, what pattern would you notice in the speed of these three trials? (see picture)
The more times you turn it to wind it up, the more energy you put into it, the more energy it can store, so the faster it will go when you let it go.
What pattern do you notice about the sound the two marbles make? (see picture)
a. The faster the black marble was moving, the quieter the sound it made when it collided.
b. The faster the black marble was moving, the louder the sound it made when it collided.
c. The speed of the black marble has no effect on the sound of the collision.
B. The faster the black marble was moving, the louder the sound it made when it collided.
Which picture is showing what a paper cup telephone string would look like up close when you are screaming, whispering, and not talking? How do you know? (see picture)
1st picture: not talking
2nd picture: whispering
3rd picture: screaming
The louder you talk the bigger vibrations you cause.
If you were to wind up a thin, thick, and very thick rubber band the same number of times, which one would store the most energy? Why? (see picture)
The thick rubber band would store the most energy because it is harder to spin, and you have to put more energy into it to spin it the same number of times as the others.
If Camila gets the 7-ball into the corner pocket (see arrow), then she wins the game! What do you predict will most likely happen if Camila lightly taps the white ball, giving it just a small amount of energy? (see picture)
The white ball will transfer energy to the 5-ball. The 5-ball will move a little and then stop.
How is it possible that a speaker playing music could break a glass windshield? Be as detailed as you can.
The speaker is causing the air particles around it to vibrate. Those vibrations travel through the air making each air particle next to the last vibrate. If the air vibrates enough, the vibrations can be transferred to the windshield and shatter it.
Which race car is using the most energy? How do you know? (see picture)
Race Car C is using the most energy because it is moving the fastest. We know that the faster something is moving, the more stored energy it is releasing at one time.
Look at the data from 3 different trials. What do you predict will happen if Rafael releases the black marble from the top of the ramp, but adds another gray marble so that there are three collisions? (see picture)
All the marbles will be safe because each collision reduces the amount of energy transferred to the next marble, so they don't roll far enough.