A thin film of oil (n = 1.46 is spread over a puddle of water (n = 1.33). In a region where the film looks red from directly above ( = 626 nm), what is the minimum possible thickness of the film?
I thought this was simple but it says my answer is wrong. Ok the light goes from a smaller to...
off by a trillion? it was the right answer- it just wanted magnitude which means the absolute value.- i realized this then it said it was correct
perpendicular- i got this at first because i was thinking about a point in space- if the current in the rod was coming out of the page towards you...
yeah i tried that- here's what i have done:
i got the value of B to be 1.33X10^-4 I then used F=qvBsin(90) and got the force to be -4.272X10^-16 which it says is wrong
I also put in that the force was going to be perpendicular to the current but apparently that was wrong because I missed...
Grr I've been trying to figure this out and I'm just getting frustrated because I can't find any help in my book...
A long straight wire carries a current of 20 A. An electron, traveling at 2X10^7 m/s, is 3 cm from the wire. What force (magnitude and direction) acts on the electron if the...
A silver wire of diameter 1 mm carries a current of 130 mA. The density of conduction electrons in silver is 5.8X10^28 m-3. How long (on average) does it take for a conduction electron to move 1.0 cm along the wire?
ok, so first I calculated drift speed using the equation Vd = I/ Ne * A...
Q20-9. The power rating of a 570 W heater specifies the power consumed when the heater is connected to an ac voltage of 120V. What is the power consumed by two of these heaters connected in series, connected to the same voltage?
570 W
285 W
1140 W
2280 W
142.5 W
ok, my original...
The potential is constant throughout a given region of space. Which of the following statements is true? Be sure you can justify your answer.
The electric field may have places where it is zero, and places where it is nonzero in this region.
The electric field is nonzero in this region...
Ah ha! that's a big help- that's basically what i was thinking but i couldn't find anything in my book that said it clearly. Thanks so much for your help!
A conducting sphere that carries a total charge of 6 micro C is placed at the center of a conducting spherical shell that also carries a total charge of 6 micro C .
(a) Determine the charge on the inner surface of the shell.
(b) Determine the total charge on the outer surface of the shell...