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Sep 27, 2011

Blog Post 3: Waves

http://phet.colorado.edu/

Simulations

Questions:

1. which takes more energy, slow up and down, or fast up and down?
Moving fast takes more energy.

2. fast frequency corresponds to low energy or high energy?
Higher frequency corresponds to high energy.


3. Determine the frequency of the provided wave(frequency 27, amplitude 50)in Hz?
.98hz



4. Determine the frequency of the provided wave(frequency 100, amplitude 50) in Hz?
3.7hz

5. Determine the frequency of the provided wave(frequency 27and amplitude 100) in Hz.
.95hz


6. What is the wavelength of the provided wave(frequency 27, amplitude 50)in cm?
60cm

7. What is the wavelength of the provided wave(frequency 100, amplitude 50)in cm?
18cm

8. Describe the relationships between energy, frequency and wavelength. Include descriptions for relationships of all three.


The frequency and wavelength are all co dependent upon the amount of energy put out, if energy is put out at a faster, and more powerful rate the frequency will increase, decreasing the wavelength. If energy is less and at a slower rate the frequency decreases and the wavelength increases.

Sep 20, 2011

Blog Post 2: Unit Cell of NaCl


Blue balls: Na
Clear balls: Cl
Na+ atoms have a width of .095 nm.
Blue balls are Na+ atoms thus equal to .095nm. in the model we have they are 1cm. With this model 1cm = .095nm.

Height, width, and length is .06m
In Angstroms: 6,000,000A
In nm: .4275 nm

.31mg is mass of  one cube NaCl
5.3E-6 moles per cube
Number of NaCl molecules per cube is 3.19E18
One side of the cube has 1472756 NaCl molecules
Meaning the dimensions of a cube of salt are 629603nm x 629603nm x 629603nm

Volume of a unit cell of NaCl is .055 nm^3
number of unit cells in a cube is 4.53E18

Blog Post 1: Description of 10 nm and a mole of atoms

The speed of light is the quickest form of speed known to man. It takes light 1.3 seconds, roughly, to go from the earth to the moon which is 238857 miles. Light travels at a speed of 186,282.397 miles in a second. Light appears to be instantaneous, when you turn on a flash light and point it at an object it seemingly is illuminated right away. But there is, however, a moment in time when the beam of light is traveling from the source to the object. How short is this time? Well it depends on the distance. In one one billionth of a second, one nano second. Light travels a foot. As you can see the term nano, in mainstream terms, is almost incomprehensibly small.

A mole is specific number of a group of atoms, that number precisely is 602,300,000,000,000,000,000,000 when most look at that they just see 602 and a whole bunch of 0s. But how big is that? The planet earth contains 6,900,000,000 people, a small number in comparison. But such a large number that if we met a new person every single second we would take approximately 3 lives (219 years). Now the amount in a mole is equivalent to 8.7*10^13 planet earth's worth of people (87,000,000,000,000). The insane part is, you can hold a mole of atoms in the palm of your hand (depending on the element.)