Recent content by bpears

Ok, so for number 2, density=mass/volume. I found the volume of a Liter of water is 1m^3. So, then I get 6kg/m^3. How does the book get 6000kg/m^3? And for 3, I got the 1st part but I don't know how to get total pressure?

Bruce, you are spot on. My instructor tells us to just use 10m/s^2 for gravity. Which I now see was a bad idea for our book. So, I get the 1st one. But the other two, I don't know how to do. For number 2, I see that if it displaces 1L, then it must have the volume of 1L? And its safe to...

Yeah, well I don't even know where to begin. I can tell it is simple but I don't know what I need to do. If you honestly believe I'm just trying to have u do my home work, then use different numbers. I just want to know HOW to do these. Thanks.

I have a few physics problems I need help with. Please show work or I won't know how to do it. My book has no example problems. 1. Suppose you balance a 5kg ball on the tip of your finger, which has an area of 1 cm^2. Show that the pressure on your finger is 49N/cm^2, which is 490kPa...

How could I have a higher output speed?

Ok, so I see what you're saying kind of now. I found the equation of continuity. But are you supposed to square the ratio before multiplying to the input speed? Here's the equation I have: V1A1=V2A2. But I think that is for no change in density? Is change in density meaning compression? For...

Well, I actually want compression if it will increase the wind speed out the other end. So would that change the equation with compression? And did I give a correct example of the ratio you describe? Thanks for your help, I've been looking all over online for something about this, but...

So if it were 30mph in, and the ratio was 1:10, then it would be 300mph out? What speed into tube, would cause compression, and then would the compression make the output speed more than the size in/out ratio?

Or would that not make compression?

1.If you have a wind tunnel, a tubing that goes from a large opening, to a smaller opening, with the larger opening facing the wind, will the wind speed be more out the smaller end since its being compressed? 2.Is there a way to calculate/guesstimate the difference in wind speed by the...