Blog 6

Develop a list of at least 10 good Nano websites. Get two types, one of a general nature, and one that is focused on your interests.


General nature:
http://www.nano.gov/
http://nanolab.me.cmu.edu/projects/
http://www.nanotech-now.com/
http://www.nbtc.cornell.edu/
http://www.techconnectworld.com/Nanotech2012/
http://www.nanomanipulation.org/
http://www.bionanotechnology.ox.ac.uk/

My interests:
understandingnano.com/medicine.html
http://www.cbsnews.com/stories/2011/09/07/scitech/main20102526.shtml
http://humanityplus.org/

Blog Post 5: Wave Interference Simulation Activities

1. Measure the wavelength of two drops of different amplitude.

High amplitude-1.70cm

Low amplitude-1.73cm

2. Measure the wavelength of two drops with different frequency.

Low frequency-3.66cm

High frequency-1.06cm

3. Explian your results.

It seems that the amplitude has very little to do with the wavelength. The frequency is directly proportional to the size of the wavelength though. Low frequency resulted in a very large wavelength while high frequency has a very small wavelength.

The amplitude, by definition has nothing to do with wavelength.

4 Introduce a second faucet for the next set of questions.

-measure the wavelength of the drips

The wavelength of the drips was 2cm

-measure distances from each drip to the 6 constructive interference points and report those values in cm

I gave my points letters based on no reason.

The graph made looks like:

1

                    P

      B

             E           A

      C

                    F

2

(Distances in cm)       B       C       E       P        F       A

Distance from 1       2.00    3.77     3.75   5.89     5.30    5.36 

Distance from 2       3.85    2.08     3.73   5.73     3.74    5.40

We see points of constructive interference at roughly multiples of the wavelength. At B the wave from one only has to travel one wavelength before it meets the trough from the wave from faucet 2 that traveled 2 wavelengths.

The points of destructive interference occur at points where a wave that travelled 1+x wavelength passes a wave that has travelled 1/2+x wavelenth. This means that a trough of one passes across a crest of another.

Blog Post 3: Wave Simulation

1. Which takes more energy, slow up and down, or fast up and down?
 Fast up and down takes more energy.
2. Fast frequency corresponds to low energy or high energy?
 Fast frequency corresponds to high energy waves.
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?
3.7037hz
5. Determine the frequency of the provided wave(frequency 27and amplitude 100) in Hz.
.98hz
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?
16.5cm
8. Describe the relationships between energy, frequency and wavelength. Include descriptions for relationships of all three.
Energy- the ability to do work
Frequency- The rate at which a wave oscillates inside of a medium
wavelength- the distance between the crest of one wave to the crest of the nex.
Energy is proportional to frequency.
Wavelength was inversely proportional to the amount of energy light has.

Blog Post 2: Unit Cell of NaCl

Post the height, width and length of the unit cell in nm, angstroms, and meters. (I'm assuming by "unit cell" you mean one molecule of NaCl)

Using a scale of reference we can determine that the actual length, height and width of an NaCl atom. (Withholding the errors in the scale model of course)

The radius of the Na atom is .095nm which is equivalent to 1cm in our model. Using this correlation we can compute the length of one side of the molecule using dimensional analysis. 

(1cm/.095nm)=(3.5cm/xnm)

x=.3325nm

In other units:

x=.332500nm = 3.32500 angstroms = 3.32500*10^10 meters

Since the figure we are trying to compute is relatively square the length used for one side is also equal to the height, width and length

 

Determine and post the mass of one cube of NaCl. Calculate and post the number of moles of NaCl in one cube. Calculate and post the number of NaCl molecules in one cube of salt.

The mass of our cube of NaCl was 4.65e-5 grams. Since the formula for sodium chloride is NaCl we can just add together both AMUs to find the atomic mass

22.98amu + 34.45amu = 57.43amu

Using simple dimensional analysis the number of moles in the sample is: 8.09e-7 mol

Further dimensional analysis of 8.09e-7 mols can reveal how many molecules are in this edible rock.

8.09e-7 mol*(6.022e molecules/ 1mol)=3.667398e17 molecules

Determine the dimension of one cube of salt. Based on the dimensions determined by the unit cell model, determine and post the number of NaCl in one cube of salt.

By our estimations one cube of salt had a side length of .0611mm 61,100 nanometers. Using the fact that one side of a NaCl molecule is .332500nm we can find out how many molecules are in the cube

by using the sublime calculations of dimensional analysis.

(611,000nm)*(1molecule/.3325nm)=1830000 molecules in that length. Of course that is one side but since it's a cube the volume shouldn't be hard to find

V = L*W*H = (1830000molecules)^3

V=6.20^18 molecules in that particular cube of salt.

The answers for two and three aren't consistent. Perhaps the salt molecules aren't as packed edge to edge so when we determine the volume it seems like there are more molecules.