Recent content by tzonehunter

Quick question, when discussing induce emf, would you state: "An emf is induced in the coil..." or "An emf is induced across the coil..." The reason I ask is that grammatically, it sounds proper to state "An electromotive force is induced in..." (something). However, an emf is a potential...

I scanned through a compendium of old AP Physics B free response problems that addressed Work and Energy. About 50% of those included a portion that required students to calculate or account for energy changes due to sliding friction. Whether or not it is appropriate to model kinetic friction...

I teach a first year Physics course. The incoming students (grades 10-12) have little to no Physics background. We are making some modifications to our work and energy unit. One modification that has been discussed is what to do about kinetic friction. At present, we account for friction as a...

Some ask how it is that high school students hook up multimeters incorrectly and have even overtly stated that "I'm doing something wrong." The latter comment is odd and comes across as arrogant. In regards to the former, we explicitly teach, through a variety of techniques, how to hook up and...

I teach high school physics and electronics. My experience is that no amount of instruction prevents students from accidentally blowing fuses when they're first learning how to measure voltage and current in a circuit. I would love to buy a classroom set of these...

Where are you located? I agree with others that the public community college / tech school route is a great place to start. The prep courses offered there are often of very high quality. I am close with two different individuals that started out working towards an associates degree at a local...

I think most of the programs on this list would be acceptable. http://ope.ed.gov/accreditation/

This is true. My district actually offers an interest free loan to complete an accredited Master's program. The loan is paid back through paycheck deductions after the program is completed.

Hi Al, I think your post gets to the core of the reason of why I asked for a master's program recommendation. I am looking for something more than amusement, a pay increase, and seniority. I was hoping someone could share a positive experience they had with a Master's Program. In theory, an...

Thank you very much for the suggestion. I did complete MIT's Mechanics Review through edX, and I found it to be excellent. I am seeking an accredited, quality Master's program. As I said, the Physics education focus options are limited in my geographic area (Wisconsin / Chicago).

Hi Everyone, I am a high school Physics Teacher. I have a B.S. in Chemistry and a B. ChemE from a Big 10 University. I did a Post-Bacc. certification program to get my teaching certification in Wisconsin. I live and teach in southeastern Wisconsin. I have small children. I'm looking for a grad...

So, as noted, I found the mistake I made and did get the correct answer. This was an arduous problem.

Step 3: Apply conservation of energy to the swinging 2 bar system to determine h_2. This picture shows the change in position of the center of mass of each bar from the collision to the top of the swing. I truncated the 2nd half of each bar to try to simplify the picture. I have drawn both bars...

Step 2: Apply conservation of angular momentum to determine the angular velocity of both bars immediately after collision. L_{before} = L_{after} I_1ω_1 - I_2ω_2 = -(I_1 + I_2)ω_{both} \frac {ml^2}{3}\sqrt{\frac{3g}{l}} - \frac {8ml^2}{3}(\frac{1}{2}\sqrt{\frac{6g}{l}}) = -(\frac {ml^2}{3} +...

Homework Statement Two uniform bars have masses and lengths of m, l and 2m, 2l, respectively. The bars are pivoted at the common frictionless hinge as shown. The bars are released from the horizontal position in such a way that they collide and stick together at the bottom position. After...