Recent content by squib

A circular loop of wire can be used as a radio antenna. If an antenna with a diameter of .215 m is located a distance of 2.50 km away from a from a source with a total power of 57.0 kW at a frequency of 102 MHZ, what is the maximum emf induced in the loop? (Assume that the plane of the antenna...

nm was stupid and messed up my vectors

A point charge q =-4.00 nC is at the point x = 0.600 m, y = 0.800 m, and a second point charge q=6nC is at the point x = 0.600 m, y = 0. A)Calculate the magnitude of the net electric field at the origin due to these two point charges. I assume i can just treat the electric field charge...

Went back and tried these again, still no luck. A sound wave travels at a frequency 2.25 MHZ(10^6) through a pregnant woman's abdomen and is reflected from the fetal heart wall of her unborn baby. The heart wall is moving toward the sound receiver as the heart beats. The reflected sound is...

or.. f is also the fundamental frequency of the pipe, so you are using f = nv/2pi (or 4pi) i can't remember which, but that factor of the equation should be inconsequential.

anyone else have any ideas?

so then 2,250,087 = 2,250,000 (1510 + V_heart)/1510 which came to .0584 m/s My answer wasn't right =/

so then 2,250,087 = 2,250,000 (1510 + V_heart)/1510 which came to .0584 m/s My answer wasn't right =/

i think this may be assuming that air/he is the medium which the wave is traveling in, not the pipe itself

A sound wave travels at a frequency 2.25 MHz through a pregnant woman's abdomen and is reflected from the fetal heart wall of her unborn baby. The heart wall is moving toward the sound receiver as the heart beats. The reflected sound is then mixed with the transmitted sound, and 87.0 beats per...

A certain pipe produces a fundamental frequency of f in air. If the pipe is filled with helium at the same temperature, what fundamental frequency does it produce? I assume that I just take (f/v1)(v2), with v1 being speed in air and v2 being speed in helium this lead me to the equation...

Thanks so much, I've been very frustrated with how to do those and couldn't find the answer ANYWHERE. Big thanks!

An aluminum can, with negligible heat capacity, is filled with 485 g of water at 0°C and then is brought into thermal contact with a similar can filled with 517 g of water at 48.5°C. Calculate the change in entropy of the system if no heat is exchanged with the surroundings. 1) I find avg...

Same problem for me. I've tried getting Q by computing specific heat * g * delta T, but no luck with that.

I assume I could graph P vs V and find work, but that seems like more work then should be neccesary. I can find the change in U, or overall energy of the system, the only problem I'm having is with work, which should give me heat since I know U.