maple ta quiz 24.1
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maple ta quiz 24.1
1. mass = density * volume (cm^3)
mass/55.8u = # of moles
N (iron atoms) = 6.02E23 * #of moles
answer is negative.
2. theta = (arc sin (wavelength/(2* distance)))*2
answer is positive.
3. magnetic field = (electric field/velocity)
answer is negative.
4. radius= ((velocity * mass)/(1.6E19 * magnetic field))
answer is negative.
Enjoy ya spring break!!
mass/55.8u = # of moles
N (iron atoms) = 6.02E23 * #of moles
answer is negative.
2. theta = (arc sin (wavelength/(2* distance)))*2
answer is positive.
3. magnetic field = (electric field/velocity)
answer is negative.
4. radius= ((velocity * mass)/(1.6E19 * magnetic field))
answer is negative.
Enjoy ya spring break!!
hmmmm.. Guest
Q#2
i am having problems with question #2 the answer keeps coming up incorrect. Are you sure that is how you slove it?
phy122 Guest
Question #1
for number one, the density is given and i dont know which one is the volume cuz its not given??? i dont quite understand the fourmula for number one and my atom is uranium???
guest 00 Guest
Re: maple ta quiz 24.1
phy122 wrote:i am having problems with question #2 the answer keeps coming up incorrect. Are you sure that is how you slove it?
The solution is correct.
angle = (arc sin (wavelength/(2* distance)))*2
Remember, arc sin means sin^1.
Also, the entire right side of the equation is multiplied by 2 (i.e. after you get the arc sin of (lambda/2*d)).
DJ Posts : 28
Join date : 20090317
Re: maple ta quiz 24.1
guest 00 wrote:for number one, the density is given and i dont know which one is the volume cuz its not given??? i dont quite understand the fourmula for number one and my atom is uranium???
Everyone has Uranium.
Remember  volume is height * length * width for a cube. Thus, the volume is simply the number in cm to the third power.
The formulas:
First, find mass using this equation: mass = density * volume
Then, divide the mass by 55.8 molar mass to find the number of moles in the cube: mass/55.8u = # of moles
Finally, find the number of atoms by multiplying by Avogadro's number: # atoms= 6.02E23 * #of moles.
Very simple.
DJ Posts : 28
Join date : 20090317
Question 2
Hey guys i Keep getting this wrong. My question is
"2) XRays with a wavelength of 0.1654 nm are scattered from a crystal with a distance of 0.2443 nm between the crystal planes. At which scattering angle does the first order diffraction maximum occur ? (sheet 9,11, the scattering angle is not the same angle which occurs in the maxumum condition!)"
Ok well I did eevrything that was shown and I get a value of 0.69068
MapleTA says Im wrong... Anyone have a clue what im doing wrong? Help would be much appreciated
"2) XRays with a wavelength of 0.1654 nm are scattered from a crystal with a distance of 0.2443 nm between the crystal planes. At which scattering angle does the first order diffraction maximum occur ? (sheet 9,11, the scattering angle is not the same angle which occurs in the maxumum condition!)"
Ok well I did eevrything that was shown and I get a value of 0.69068
MapleTA says Im wrong... Anyone have a clue what im doing wrong? Help would be much appreciated
Money23 Guest
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