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More Waves &
Energy
Earth and Tectonics
TotallyRandom
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Stars & The Universe
Waves & Energy
What is the definition of energy
and unit it is measured in?
Energy is the ability to do work,
measured in Joules.
What is constructive and destructive interference in
relationship to waves being in and out of phase.
Constructive- in phase, waves add
Destructive- out of phase and waves cancel
What are the names of 2
different types of Potential Energy
Gravitational Potential energy
And Elastic potential energy
What are the 5 forms energy can
be found in?
1. Chemical
2. Nuclear
3. Mechanical
4. Heat
5. Electromagnetic
What is the Doppler Effect and describe its effect
on light and sound.
Doppler Effect- change in frequency as waves travel towards/away
Light- Blue:towards; Red: away
Sound- High pitch: towards;
Low pitch: away
What is the difference between harmonic and linear motion and give
an example of each.
Harmonic motion is repeating- like a swing going back and forth, or like Dr. B in class saying the
same things over, and over, and over again.
Linear motion does not repeat, like walking home from a concert after the taxi never showed up
Direct or Inverse???
What is the relationship between
-frequency and wavelength-wavelength and period-period and frequency
- frequency and wavelength: inverse- wavelength and period: direct- period and frequency: inverse
Draw a wave and label:
Crest, trough, amplitude, and wavelength
What is the difference between mechanical and electromagnetic
waves and give an example of each.
Mechanical- requires a medium (sound)
Electromagnetic- no medium required (light)
When singing in the shower, Dr. B hit a note that cracked her bathroom mirror. What is the name of this phenomena and
describe in detail how it works.
In your description discuss how sound waves travel (transverse/longitudinal-
compressional/mechanical/electromagnetic/) and how they interact
(constructive/destructive interference).
This phenomena is called resonance.
Sound waves are mechanical (require medium) and longitudinal/compressional (wave travels in the
same direction as motion).
When the frequency of the pitch of Dr. B’s amazing operatics equals the natural frequency of the glass,
constructive interference happens and the amplitudes increases so much that the mirror
breaks.
What is the difference between
a star and a planet?
Stars undergo nuclear fusion and
planets do not.
Direct or Inverse??
What is the relationship between
-Gravity and mass
-Mass and Lifespan
Gravity and mass- direct
Mass and lifespan- inverse
If a white dwarf and a neutron star got into a confrontation, who have more pull on the
other? Describe why.
Neutron star because it is more dense and more
mass, more gravitational pull.
What is more luminous, a Blue supergiant or a
Red giant? Explain.
Blue supergiant. Luminosity is brightness. Blue light is a higher
frequency (more energy) and brighter than red light.
When black holes engulf objects, X-rays get emitted.
Explain why this would make sense using E=mc2 and
the law of conservation of mass/energy.
The law of conservation of … states that energy/mass cannot be created nor destroyed but can only change forms.
Einstein’s equation E=mc2 states that energy and matter can be converted into each other as well.
So when matter gets sucked into a black hole, the intensity of the pressure can change mass into energy, which is being
emitted.
What is the name of the crust and
outer mantle combined?
lithosphere
What is the name of the circular motion of the fluid that moves the
plates and where is it located in the Earth’s structure (one word)?
Convection currents in the
Asthenosphere
What are the layers of the Earth
and their respective states of
matter?
Inner core- solid
Outer core- liquid
Inner mantle- liquid
Outer mantle- solid
Crust- solid
What kind of boundary causes mountains, trenches, and volcanos and specify the
nature of each.
Convergent boundaries of:
Continent- continent- mountains
Continent- ocean- volcano
Ocean- ocean- trench
What are the 3 types of boundaries and what tectonic
feature/movement does it produce?
Transform- earthquake
Divergent- valley
Convergent- mountains/volcano/trench
What word does Dr. B use (repeated harmonicly) to indicate that you should
kindly put away your computers?
Rid, rid, rid….
Fill in the blank:Despite it all, to me she was beautiful still, but that beauty
had faded, glowing like a _______ _________who had reached almost the end of her life, like a dying white rose
past its prime.”
White dwarf
What uses more gass, a honda civic or a hummer and what does this have to do with the universe?
A hummer. Because bigger
stars use a lot more fuel (and therefore have shorter lives).
Why are some of you like a black
hole?
Because the information goes in but never comes out. Where it goes is a mystery.
What is not matter, but does matter?
Energy
Make your wager
What is the strongest force in
the universe?
Love.
