Recent content by stinsonbr

This is exactly what I was trying to fish out. Can you give an "explain like I'm five" explanation on how this happens?

Everything that has been said so far I understand already. So there's no secret here? It's simply that the ice has to be cold enough to cool the drink below 0°C before reaching the equilibrium temperature? I had read that it had something to do with the process of ice melting making the ice...

I am not sure, if that would be a part of the answer then please explain it. Let me word it this way: if I were making an alcoholic drink and took ice out of my freezer, put a few cubes in the drink and stirred, what factors could cool the drink to below zero? Second question (if the first...

Can someone explain how this happens?

I've taken one course, but we never went over a moving flame front, just general transient heat transfer problems. Does this not add more complexity to the problem?

I am not familiar with non steady-state heat transfer problems, any resources on where I could get started would be a huge help: There is a pipe filled with a fuel/air mixture. This mixture is ignited at one end of the pipe, so that the flame front propagates through the pipe. How can we...

Good thing I didn't post my original calculations. I went over it again, and using 3.86x10^26 W from the core, and assuming 25% solar radius is where almost all power is made (.25*695,800,000m = 173,950,000m) I get about 17.5 W/m^3. This value just seems very low, though I do understand the size...

I'm curious about something I read comparing the power released in the core of the Sun being comparable to a compost pile (~276 W/m^3). This seems very low (Wikipedia confirms this value). The value I find for power in the core is on the order of 10^26 W, and using the volume of the core of...

Interesting experiments... grappling hooks and weird flying things that you can't talk about. Are you the beginnings of a new Bruce Wayne?

Perhaps we need some more clarification, do you intend to use the thrust to lift the object vertically to your specified height? This makes it sound like you will use it for horizontal thrust. As for the H2O2 jetpack, I stand corrected. I even wrote a little paper on those back in college...

It's going to be tough to accomplish this using compressed air. Are you able to change your fuel? (I don't think we can technically call it "fuel"...owell). If so then it might be worth looking into other ideas currently in use. Compressed Hydrogen Peroxide is being used in current jetpack...

The pitch varies along the length of the blade, being greatest at the hub and at a smaller pitch at the tip, due to the blade tip speed being much higher than the speed at the hub. I don't have specific or referenced angles, however you are definitely close with your range.

The square root function is discontinuous in nature in the complex plane, so sqrt(x)*sqrt(y) = sqrt(x*y) only applies if x and y are both non-negative and real. Otherwise you could do this: -1 = i*i = sqrt(-1)*sqrt(-1) = sqrt(-1*-1) = sqrt(1) = 1 And now every math guru is feeling a...

2000m is not considered high altitude. The U2 could fly above 21,000m, which then brings concerns over such low density air, but affected engine performance and control more than the type of airfoil (debatably). I'm not familiar with the program you mention. Can you give more specifics into...

Rule of thumb: If they will only accept the higher score (most do it like this), then ALWAYS retake the test. It can only help!