Recent content by EgpYo

Can you outline the procedure? I really don't understand this last unit of quantum mechanics. Like what is the full equation? I would be solving for v

Its 0.293% of the speed of light. But I'm mainly concerned about how to do the question without Ek=1/2mv^2. What if it WAS close to the speed of light? Is there a different procedure I can use?

8.79x10^5 m/s

Homework Statement I need to figure out the energy, rest mass, speed, wavelength and momentum of a 2.2 eV electron. Thats all it says. Homework Equations Ek = 1/2mv^2The Attempt at a Solution I don't understand what 2.2 eV is. The kinetic energy? This converts to 3.52x10^-19 J Rest mass...

Homework Statement A plane is moving at a constant speed of 300m/s. If you are inside and you shine a light towards the back of the plane, how will light appear to move from the Earth's frame of reference? Homework Equations None The Attempt at a Solution Light always moves at 3x10^8 m/s so...

And going back to my original question, wouldn't that mean that 450 has 3 significant figures? Because using that same logic, ideally it should be written as 45x10^1

Im going to ask you about another question, just to make sure I got the hang of this. The question gives me 20m and 10m and my final answer was 22m. So this should stay as 22m? Because the only other way you could write 10m is 2x10^1. The fact that it is not written this way means the 0 should...

Homework Statement To simulate gravity a circular space station with a radius of 150m is rotated so that astronauts on the inner surface move at 30m/s. If a 75kg astronaut stands in a bathroom scale, what reading will it give? In Newtons. Homework Equations Fc = mv2/r The Attempt at a...

Homework Statement A muon has a lifetime of 2.0x10^-6 seconds when at rest, after which time it decays into other particles a) Ignore any effects of relativity discussed in this section. If the muon was moving at 0.99c, how far would it travel before decaying into other particles, according to...

That isn't the interference pattern. I just found one similar on the internet to show what it looks like. Its black and white instead of actually showing the waves like the picture gneill posted. But I need to know: Is the calculated wavelength for part a) supposed to be the same as part b)...

I understand the first picture you posted (with the different colors representing peaks and troughs). And whenever I put the ruler to the screen, I can always calculate the wavelength to be the same along antinodal or nodal lines, wherever I measure. This is not the case with the black and white...

L increases so the force should increase but it is also not perpendicular to the magnetic field so I don't get it.

yes to both

Thats all it says. I actually wrote the question wrong, it says: What will happen to the force on the wire if the wire is rotated slightly in the horizontal plane?

Homework Statement A magnetic field of 1.4 T [N] is 4.0m wide. A very long wire crosses the field. The current in the wire is 2.0 A [W]. What would happen if the wire is rotated slightly in the horizontal plane? Homework Equations F = ILBSinx The Attempt at a Solution I don't understand...