# Search results

1. ### Thin Film interference: air wedge

Actually, the equation for the constructive interference is 2t=(m+1/2)*wavelength, not really m-1/2. But I guess it could be right. OK, I will try.
2. ### Thin Film interference: air wedge

So I assume n=1.00029 roughly equal to 1. so the equation simplifies to 2t= m*wavelength. There will be a constructive interference as the ray is reflected off of the glass into the air since air acts as a sliding ring.
3. ### Thin Film interference: air wedge

1. Homework Statement A pair of very flat glass plates, 7.41 cm long, touch at one end and are separated at the other end by a small piece of 44 gauge copper wire, 5.08×10−5 m in diameter. An air wedge is formed between the glass plates by this supporting wire. Light of wavelength 631 nm...
4. ### Amplitude of an electron

I apologize for what I said since I finally got the answer.
5. ### Amplitude of an electron

OK I got it. The amplitude must be 3.448e-7m. Vmax=-A*2pi*f
6. ### Electron orbital frequency of hydrogen atom if given orbit radius

Bohr radius is 5.29e-11m by the way.
7. ### Amplitude of an electron

Fortunately it does help me.
8. ### Amplitude of an electron

Electrons have dual nature of wave and also of particle. Did you study anything about electrons and current and the fact that it moves in a zigzagging path? It's a wave as well. But if you say so, which equation are you talking about and if you know it why not put it on your pose unless you're...
9. ### Amplitude of an electron

I supposed I did but you didn't explain why there's no distance dependence.
10. ### Amplitude of an electron

Asin(2pi*x/lambda-2pi*f*t)=y as a function of x and t. and you're not helping me yet.
11. ### Amplitude of an electron

1. Homework Statement In a typical household current, the electrons in the wire may have a drift speed of 1.3×10−4 m/s. Actual household current is not a direct current, but instead is an alternating (oscillating) current. (If you have ever received an electric shock from an outlet, you have...
12. ### Higher order Calc project

http://www.icp.uni-stuttgart.de/Jahresberichte/01/node2.html [Broken] provides a good detailed explanation of the applications. It doesn't really look too hard though.
13. ### Higher order Calc project

Is it possible to interpret fractional calculus in a physical sense like the first derivative is the rate of change, but if it's fractional, what does that represent?
14. ### Higher order Calc project

Hmm. Fractional calculus sounds pretty cool. But any cool applications associated with that?
15. ### Higher order Calc project

I was wondering if there are any topics for calculus based or advanced high school math project that I can devote my whole semester to at school.
16. ### Find the appropriate distance

OK, so kq1/x^2 = kq2/(100e-6-x)^2 would be a right equation. Now I got it. x=4.14e-5m. Thanks a lot.
17. ### Find the appropriate distance

It will be between the charges. kq1/x^2 = -kq2/(x-100e-6)^2; where this holds true would be the x. But the calculator can't find the intersection.
18. ### Find the appropriate distance

Or I should've added x+100e-6 rather than subtracting it.
19. ### Find the appropriate distance

1. Homework Statement Two particles are situated on the x axis. The particle q1, with 34 excess electrons, is situated at the point x = 100 μm. The other particle q2, with 17 excess electrons, is located at the origin. Give the x value of a point between the particles where the strength of the...
20. ### Doorframe problem

I really don't have an intuitive sense as to where the resultant electrostatic force will point to. So all I can rely on is calculation. So the right angle is 320.3868? The angle is actually atan(1/sqrt(5)). So using the angle, 24.095degrees, the ordered set of x and y component of electrostatic...
21. ### Doorframe problem

So I assumed that the positive charge at the top left corner is 1.602e-19C, an elementary charge. Likewise, the negative charge at the top right corner is assumed to be -1.602e-19C. The dust mite, although unspecified of its value, is negatively charged, so I assumed its charge to be...
22. ### Doorframe problem

Any brave souls?
23. ### Electrostatic force

So, the cat is not at the centroid? Now the picture becomes very blurred.
24. ### Doorframe problem

A doorframe is twice as tall as it is wide. There is a positive charge on the top left corner and an equal but negative charge in the top right corner. What is the direction of the electric force due to these charges on a negatively charged dust mite in the bottom left corner of the doorframe...
25. ### Electrostatic Force HELP

So can you give concrete equations to equate with?
26. ### Electrostatic force

OK, so the centroid divides each median length. But do these medians be cut in half length? So in this case, the centroid is located 5sqrt(3) from the base? and the same distance from each side? Then to find the charges, do I need to divide into x and y components by using cosine and sine. Then...
27. ### Electrostatic force

1. Homework Statement A mad scientist is designing a trap for intruders that will lift them up into the air and hold them helpless. The device consists of an equilateral triangle, 10.0 meters to a side, embedded in his floor. When he flips a switch, the corners of the triangle will be...
28. ### Regarding the definition of Work

Thanks a lot though. So the work done by the gas is positive when it expands.
29. ### Regarding the definition of Work

I was worried about the sign when the gas expands. Why do AP and textbooks differ in signs?
30. ### Regarding the definition of Work

Confuses me very much. AP Physics specifies that when gas expands, negative work has been done. But most textbooks say that it's positive work. Could anyone explain the discrepancy here?