What is energy?
What is the base provider of energy for the food chain?
The Sun
T or F: Perpetual Motion Machines currently exist
False
Ocean waves are an example of a:
surface wave
The highest point of a wave is:
crest
A pattern of vibration that simulates a wave standing still is:
Standing Wave
When bonds at the atomic level break or form, what form of energy is being released?
Chemical Energy
What is the Law of Conservation of Energy?
Energy can be neither created nor destroyed
How do your vocal cords produce sound?
Vibrations
The lowest point of a wave is called:
Trough
What happens as the intensity of the sound increases?
The loudness increases
In order to get a proper pump in, you need to move 240kg of weights at a velocity of 10 m/s. What is the kinetic energy expelled?
12,000 J
Output: 750,000J
Input: 1,000,000J
Efficiency: ?
75%
Light waves are an example of a:
Transverse Wave
The distance a particle is displaced from its resting place, otherwise known as how tall the wave is:
Amplitude
The bouncing back of a wave when it meets a surface or boundary is:
Reflection
When a sling is pulled back to maximum capacity and then released, what energy transfer is happening?
The elastic potential energy of the band is transferring to the projectile and is converting to kinetic energy
You get 7,000J of output from 13,000J of input. What is your waste?
6,000 J
What is the difference between a mechanical wave and an electromagnetic wave?
A mechanical wave requires a medium to travel through, while an electromagnetic wave does not
When you hear a car past the sound tends to change, which is an observable change in frequency due to movement of the source. What is this called?
Doppler Effect
What are the relative units we use to measure sound?
Decibels
You are J'Lynn Sarlo. You are relatively short, so Mr. Grim has a hard time seeing you when he is standing up. Therefor you have to jump. At the height of your 0.5 meter vertical jump you have 1000 J of Potential Energy. What is your mass?
204.08 kg
Throw everything you know of efficiency out the window. Suddenly machines can have efficiencies of over 1. You are utilizing this new miracle machine. You put in 1500 joules of effort and it produces an out of 3000 joules. What is the efficiency?
200%
What kind of wave does a microwave put out?
microwaves
A wave has a wavelength of 100 meters and a period of 20 seconds. What is the speed of the wave?
5 m/s
True or False: The only difference between a reflection at a fixed boundary and reflection at a free boundary is that a reflection at a free boundary flips upside down, instead of just opposite.
True