3. It is amazing how different creatures vary in sound; some
we can imitate while some we cannot
Loud sounds can cause vibrations, which is a wonder
because its waves are invisible to the naked eye. We don’t
even see it touching anything yet it can make an object
move.
The longer the tuning fork, the shorter the frequency.
5. How come salt particles were able to form symmetrical
shapes with just mere help of a speaker’s vibrations?
Do birds have frequencies higher than humans can hear?
Aside from salt, what other particles can produce sound
vibrations that will form different patterns?
What are the factors affecting frequency?
7. As the object vibrates, it pushes the air molecules next to it closer together,
in patterns corresponding to the movements of the object. These patterns
of compressed air molecules bump into the ones next to them, passing on
the pattern.
The frequency range of human hearing is often reported to be between 20
and 20,000 Hz.
Aside from salt, there are other particles that can produce sound vibration
just like in the salt experiment, which is the cornstarch with water.
There are a lot of factors affecting frequency, sometimes depending on the
object you’re using.
8. •Frequency dispersion, which means that waves of
different wavelengthstravel at different phase speeds.
•Free surface is generally considered to be a dispersive medium.
•Surface gravity waves, moving under the forcing by gravity,
propagate faster for increasing wavelength.
•Capillary waves only forced by surface tension, propagate faster
for shorter wavelengths.
•Nonlinear effect, by which waves of larger amplitudehave a
different phase speed from small-amplitude waves.
12. You are a chord. Matter is vibrating energy, which means that
you're a collection of vibrations, also known as a chord.
You are healthy when that chord is in complete
harmony. Socrates said that: "Rhythm and harmony find their way
into the inward places of the soul, on which they mightily fasten,
imparting grace, and making the soul of him who is rightly educated
graceful, or of him who is ill-educated ungraceful.“
High Frequency Sound
1. Is greatly reduced by passing through air
2. More disturbing to the human ear than low frequencies
3. Strongly directional and more easily reflected
Sounds….
13. Researchers have discovered that a frog that lives near noisy
springs in central China can tune its ears to different sound
frequencies, much like the tuner on a radio can shift from one
frequency to another.
The reason our voices change when we inhale helium is not
because the frequency of the sound changes, but because the
timbre changes. Helium is significantly less dense than air.
Sounds….
14. Stars with really strong gravity cause themselves to become smaller
and smaller and eventually turn into black holes.
Stars come in different colors; hot stars give off blue light, and the
cooler stars give off red light.
A Pulsar is a small star made up of neutrons so densely packed
together that if one the size of a silver dollar landed on earth, it would
weigh approximately 100 million tons.
A Comet's tail always points away from the sun.
You can see stars from the bottom of a well even in day light.
Stars….
15. Other animals can see parts of the spectrum that humans can’t. For
example, a large number of insects can see ultraviolet (UV) light.
The speed of light in a vacuum (an area empty of matter) is around
186,000 miles per second (300,000 kilometers per second).
The visible spectrum is the portion of the electromagnetic
spectrum that is visible to (can be detected by) the human
eye.Electromagnetic radiation in this range of wavelengths is
called visible light or simply light. A typical human eye will respond
to wavelengths from about 390 to 750 nm. In terms of frequency,
this corresponds to a band in the vicinity of 400–790 THz. The
spectrum does not, however, contain all the colors that the human
eyes and brain can distinguish. Unsaturated colors such as pink,
or purple variations such as magenta, are absent because they can
only be made by a mix of multiple wavelengths.
Color/Light….
16. References:
Skytopia. (n.d.). Light and color trivia. Retrieved February 5, 2012 from
http://www.skytopia.com/project/light/light.html.
Absoulte Astronomy. (n.d.). Visible light. Retrieved February 5, 2012 from
http://www.absoluteastronomy.com/topics/Visible_spectrum.
Science Kids (n.d.). Science facts. Retrieved February 5, 2012 from
http://www.sciencekids.co.nz/sciencefacts/light.html.
Wikipedia. (n.d.). Dispersion (water waves). Retrieved February 5, 2012
from http://en.wikipedia.org/wiki/Dispersion_(water_waves).
17. Members:
Cuisia, Marie Camille
Agbunag, Nikka Julienne
Aguirre, Patricia
Chua, Selena Kyle
Cordero, Cristina Marie
Gambalan, Wendy
Joaquin, Mary Joy
Oliquino, Samantha
102A-Ms. Rhoda Tayag
