What is Energy?
What are the two main forms of potential energy we talked about in class?
Elastic and Gravitational
Between what points on the roller coaster would the total kinetic energy pass the total potential energy first?
A To B
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
The lowest point of a wave is called:
Trough
A pattern of vibration that simulates a wave standing still is:
Standing wave
What is the base provider of energy for the food chain?
The Sun
Alyssa Davis cant sit in her seat for more than 30 seconds. One time when out of her seat she decided to move a chair out of her way. Her efficiency was 1%, while the work she put in to move the chair was 151 joules. What is the output?
1.51 J
Which is an example of a mechanical wave?
Earthquake
The distance from crest to crest or trough to trough:
wavelength
The bending of waves as they pass an edge (or pass through an opening) is called:
diffraction
When bonds at the atomic level break or form, what form of energy is being released?
Chemical Energy
Output: 750,000 J Input: 1,000,000 J Efficiency: ?
75%
What kind of wave does a microwave put out?
Microwaves
What are the relative units we use to measure sound?
Decibels
The bending of waves as they pass from one medium into another is called:
refraction
You are Trey Marshall. 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
Perpetual Motion Machines currently exist
False
What is an example of an electromagnetic wave?
What causes sound waves?
Vibrations
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
What is energy, as per our slides?
The ability to do work
What is the Law of Conservation of Energy?
Energy can be neither created nor destroyed
Light waves are an example of a:
Transverse wave
What is the point at which two objects naturally vibrate at the same frequency?
Resonance
What is the difference between the nodes and antinodes in a standing wave?
The nodes are points of non-movement, where anti-nodes are points of maximum movement