Waves

Based on the Wave on a String simulator on PhET.

1. which takes more energy, slow up and down, or fast up and down?
 Fast up and down uses more energy than slow up and down.

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

 Fast frequency corresponds to high energy.

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

 .98 Hz

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

 3.7 Hz

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

 .98 Hz

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

~61.5cm

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 and frequency are directly related, meaning, as frequency increases so does the energy required to achieve that frequency. Frequency and wavelength have an inverse relation, as your frequency increases the distance between waves decreases (this also implies an inverse relationship between energy and wavelength).

Unit Cell of NaCl

Unit cell of NaCl model created in lab

A unit cell of NaCl is .78nm in length or 7.8 angstroms or 7.8e-10m

The mass of one cube of NaCl is 5.85e-5 grams. From that you can calculate that there are 1.001e-6 moles of NaCl in one cube. And from that number you can calculate that there are 6.028e17 molecules of NaCl in one cube.

The demension of one cube of salt is .5mm in LxWxH. From the previous dimensions of the unit cell of salt we can calculate that we have 3.69e6 molecules of NaCl in one cube of salt.

The size of 10nm and a mole of atoms

A nanometer is decidedly a very, very small unit of measurement. To help visualize just how small that is 10nm is roughly equivalent to the size of a cell wall.

Contrasting to the very small some units of measurement are quite vast and are also difficult to visualize, for example, one mole of atoms. A mole is corresponds to a value of 6.022*10^23 of something. To help put that in perspective if you took all of the water on the planet (in gallons) and multiplied it by 100 you would have roughly 1 mole of water (in gallons).