Recent content by r_swayze

Homework Statement White light illuminates an oil film on water. Viewing it directly from above, it looks red. Assume that the reflected red light has a wavelength of 615 nm in air, and that the oil has a thickness of 2.640e-7 m. What is the refractive index of the oil? Assume that the...

Homework Statement The current in a 4.70 mH inductor decays over time according to the following function, where t is in seconds. I(t) = (.943A) e-(396 s-1) t) (a) What is the induced emf across the inductor at t= 5.00 ms? (b) How long does it take the emf to drop below 1.25 mV?The Attempt...

Four identical 5.00 Ω resistors are joined and form the four sides of a square. (a) What is the resistance between points A and B? (b) What is the resistance between A and C? The answer to (a) is 3.75 and (b) is 5, but I have no idea how to get those answers. Can somebody help?

(a) What is the magnitude of the current that flows through branch AB? (b) In what direction does the conventional current flow in branch AB? (c) What is the magnitude of the current that flows through branch CD? (d) In what direction does the conventional current flow in branch CD? I don't...

but if the 20 resistor were to go out, then wouldn't there still be a path for the 6 resistor to reach the battery? I thought the definition of parallel was a junction between resistors.

(a) What will the ammeter read? Report this as a positive number. (b) How much power is dissipated by one of the 10.0 Ω resistors? I am confused about which circuits are in series or parallel wiring. I know the small 10 ohm and 10 ohm loop is parallel, and the 20 ohm to 6 ohm are parallel...

Four charges are arranged at the corners of a rectangle as shown in the diagram. How much work needs to be done to move the charge q2 to infinity? Since change in PEe = W, am I suppose to find total potential electric energy of the four charges and then subtract the total potential electric...

A particle with charge +7.88 μC is placed at the fixed position x = 3.00 m in an electric field of uniform strength 300 N/C, directed in the positive x direction. Find the position on the x-axis where the electric field strength of the resulting configuration is zero. I don't understand...

Two identical strings are sounding the same fundamental tone of frequency 156 Hz. Each string is under 228 N of tension. The peg holding one string suddenly slips, reducing its tension slightly, and the two tones now create a beat frequency of three beats per second. What is the new tension in...

The problem states: "Balance the following redox reaction: In basic solution, oxygen difluoride reacts to produce fluoride ion, oxygen, and water." I figured out one way of doing it by just adding H2O, H^+ ions, and OH^- ions to either side and balancing it, but I want to know how to do it...

OF2 --> F- + O2 + H2O OF2 --> F- 2H+ +OF2 --> 2F- + H2O 2H+ +OF2 + 4e- --> 2F- + H2O This is as far as I can get. I don't know how to do the other half of the redox since the equation would be: OF2 --> O2 + H2O What do I do here? Maybe I am not setting this up correctly?

"If your calculator has overflow issues with this problem, you can use this identity to solve for K: if log(K) = x + y then K = 10x * 10y Problem: log(K) = 127.702 K = 5.04316 * 10127 " Doesn't K = 10127 ? Where are they getting the 5.04316 from? How are they using that specified...

The pulley shown in the illustration has a radius of 2.70 m and a moment of inertia of 39.0 kg∙m2. The hanging mass is 4.20 kg and it exerts a force tangent to the edge of the pulley. What is the angular acceleration of the pulley? All I have so far is the force exerted on the pulley by the...

ok, but then how would I find the radius needed for that orbit? I can't just plug in 0 for F = GMm / r^2, right?

the textbook says it does: "The total energy of a satellite increases with the radius (in the case of circular orbits) or the semimajor axis (in the case of elliptical orbits). Moving a satellite into a larger orbit requires energy; the source of that energy for a satellite might be the...