Recent content by cheechnchong

Homework Statement How Does Fermentation Rates Change With Different Types of Yeasts? The Attempt at a Solution I have a procedure written up, which I'm confident about. However, I need 2 academic experiments from websites to confirm my procedure. I literally searched every database...

[SOLVED] Lewis Reaction Questions (Organic Chemistry) Homework Statement 1) H2C=O + CH3NH2 <-----> ? 2) CH3(C=O)-CH2(C=O)-OCH3 + CH3O(-) <-------> ? 3) CH3CH2CH2-COOH + Na2CO3 <------> ?The Attempt at a Solution 1) My Answer: CH3NH2 is the lewis base and H2C=O is the lewis acid. Nitrogen...

Homework Statement Indentify the interparticle force between the solvent and solute. If you feel that one force holds more solute to solvent, then list them in order of strongest to weakest. (a) CF3CH2OH in H2O (b) NH4+ in H20(l) (c) C5H12 in C9H20 (d) NO3- (nitrate ion) in CH3OH (e)...

ummm i don't know. the book I am using is very brief about this section. it basically derives the equations for you and tells you this is the only way to solve a problem...obviously, that's not the case with this problem.

nevermind. i have no idea what I am talking about...btw, you asked why on the first qustion. it's because the incident hits the surface at almost a perpendicular distance (im assuming), which is 180 degrees (or straight down) so the phase change is 2 due to 2 of the wavelengths?

ah that's a clearer picture to me. 1st question: 1/2 phase shift 2nd question: nothing - dark fringe? phase change depends on the amount of light? true?

is it 0 in this case? b/c that sort of sounds like something in destructive interference. otherwise it would be 1/2*wavelength(film) since half of the wavelength is shifted?? but for each? hmmm

Ok so...what about the phase change? do you avoid that?

ok so should the equation look like this: t = 1/2*wavelength(film) since the extra path traveled is just t? t = 414 nm/2 = 207 nm

ok...does this look correct?? 2t + 1/2*wavelength(film) = wavelength(film) t = 1/4*wavelength(film) t is for thickness I get the wavelength(film) by dividing 580 nm by 1.40 (refractive index of gasoline). THIS IS WHERE MY QUESTION LIES...which n-value should I use? 1.40 or 1.52 or...

Diffraction Question: Calculating m... Homework Statement There are 5620 lines per centimeter in a grating that is used with light whose wavelength is 471 nm. A flat observation screen is located at a distance of 0.750 m from the grating. What is the minimum width that the screen must have so...

Homework Statement A film of gasoline (n= 1.40) floats on glass (n = 1.52). Yellow light (wavelength = 580 nm in vacuum) shines perpendicularly on the film. Determine the minimum nonzero thickness of the film, such that the film appears bright yellow due to constructive inteference...

^^^^?

any help here?

Homework Statement Light that has a wavelength of 668 nm passes through a slit 6.73 x 10^-6 m wide and falls on a screen that is 1.85 m away. What is the distance on the screen from the center of the central bright fringe in the third dark fringe on either side? Homework Equations I will...