Homework Statement
A proton in a tin nucleus is known to lie within a sphere whose diameter is about 2.2 multiplied by 10E-14 m. What are the uncertainties in the momentum and kinetic energy of the proton?
Homework Equations
delta(x)*delta(p) >= hbar
delta(E)*delta(t) >= hbar
The...
Homework Statement
What is the de Broglie wavelength of a neutron whose kinetic energy is equal to the average kinetic energy of a gas of neutrons at temperature T = 17 K?
Homework Equations
lambda = h/p = h/mv.
The Attempt at a Solution
Well first I tried taking the h =...
In a neutron two-slit diffraction experiment, the slits are 100 µm apart. If the third diffraction maximum is located at an angle of 2.0x〖10〗^(-7) rad, what is the kinetic energy of the neutrons?
Relevant equations:
nλ=Dsinθ
K=p^2/2m=h^2/(2mλ^2 )
Thus we have then
λ=((100x〖10〗^(-6) m)...
Yes, I would really like some additional input on this problem as well, if anyone has anything to offer.
I have tried all of the steps Yroyathon has done and still have not arrived at the correct answer.
Except what I did was do (6.5E-5sin(2^-7))/(3)=lambda.
From this I used K=...
Sure, that makes sense as well.
Thus:
[2(4.02E7 m-6.36E6 m)]/(3E8 m/s) = 0.2256 seconds
which makes the comparison as follows:
0.2256 seconds/0.02666 = 8.4621
which simply means,
It would take 8.4621 times longer to reach North America from Europe using the satellite method...
Oh that makes sense.
So in turn I understand that
2x(4.02E7 m) {for there and back} - (6.37E6 m) {for the radius of the earth} divided by the speed of light.
Hence [(2x(4.02E7 m))-(6.37E6 m)]/(3E8 m/s) = 0.2467 seconds.
Thus, I am still stuck on how to compare these two times
If I...
Homework Statement
Telephone connection between Europe and North America can be carried by cable or by the use of a geosynchronous communication satellite. Estimate the time it takes for a signal to travel 8000 km via cable, assuming the speed is close to the speed of light. How does this...
A diatomic ideal gas such as air, for which γ = 1.4, expands adiabatically to 40 times its original volume.
(a) By what factor does the temperature change?
(b) By what factor does the pressure change?
I'm not sure how to attempt/approach this one. If anyone has any suggestions, it would be...
Grains of sand of mass 3.0x10^-3 g each, fall from a height of 0.8 m on a sticky surface at a rate of 50 grains per second per cm^2. What pressure does this shower of sand exert on the surface, assuming that air resistance can be neglected?
I'm really not sure what angle to take here. I...
I am having trouble with this question:
The temperature of the espresso coffee (mostly water) can be increased by blowing 100 C steam into it. How much steam (in grams) is needed to heat up a 20 cm^3 cup of espresso from 50 C to 80 C? What is the volume of this quantity of steam assuming that...