Recent content by AlaskanPow

Homework Statement Im having trouble understanding parts about the z-axis for my statics class. You know how Fx=FcosΘ and Fy=FsinΘ. How do you express force in the z direction? And also if I have a right triangle with a leg of 24 units and a leg of 7 units and a hypotenuse of 25. I see they...

Homework Statement Hi guys, I'm working on my water rocket this weekend, and have done most of everything except the parachute deployment. I'm trying to come up with some ideas on how to deploy my parachute. I don't have access to any sort of timer or computer device to deploy it, so am...

Homework Statement An engineer is designing a system that requires transporting .01 m^3/s of helium at 15°C and 120 kPa. The velocity of the pipe is limited to 40 m/s. What size (diameter) of pipe is needed? My question is what equation do i need to solve this problem? Homework...

Homework Statement A rectangular metal plate measures 0.20 m long and 0.3 m wide. The plate is heated to a temperature of 1,433 K by passing a current through it. Assuming that it behaves like a blackbody, how much power does the plate radiate under these conditions? Homework Equations...

Hmmm interesting. My book does not go into depth very much, because I am in a survey class, so I don't understand how you could calculate it without having your temperatrure. The only equation I got in my book for carnot efficiency is carnot efficiency=(Thot-Tcold)/ Thot

My book says (efficiency=energy output/energy input) Which would give me 75% I believe. So there is no way to get the carnot efficiency?

An engine transfers 2.00x10^3 Joules of energy from a hot reservoir during a cycle and transfers 1.50x10^3 Joules as exhaust to a cold reservoir. Find the actual efficiency of the engine and then compare it to the carnot efficiency. The actual efficiency is 75% I calculated. For carnot...

Hey, thanks for the replys I ended up figuring it out. 20000Hz/1568Hz and it gave me the right answer of 12 harmonics.

My problem only gives me joules to work with. Is it possible to convert from joules of energy to temperature (Kelvin)?? If so how?

Well i did the 20000Hz/1568Hz and it gave me the right answer of 12 harmonics. I am not sure why it rounded down like that though.

20,000 Hz according to my book. Do we do this then ----> 20000Hz/1568Hz?

The frequency of the highest note on the saxophone is 1,568 Hz. 1.How many harmonics of that note can we hear? 2.How many harmonics of the note one octave below it can we hear? I didn't put the title in correctly on my first thread, so calm down everyone. But my book aint helping me much...

The frequency of the highest note on the saxophone is 1,568 Hz. 1. How many harmonics of that note can we hear? 2. How many harmonics of the note one octave below it can we hear? The book really gives no examples or information on determining number of harmonics, so an explanation of the...