Homework Statement
A source and an observer are each traveling at 0.52 times the speed of sound. The source emits sound waves at 1.2 kHz.
(a) Find the observed frequency (in kHz) if the source and observer are moving toward each other.
(b) Find the observed frequency (in Hz) if the...
Ok, I figured out my issue.
For part (a), I took my number, subtracted 1 from it, and then multiplied by 100 to get the %.
Similarly, for part (b), I subtracted my number from 1. Makes sense now.
chaoseverlasting, thank you for the response. However, to be honest, I don't really have any idea what those equations mean.
For part (a), I am able to get the equation down to deltaP of B / deltaP of A = (r of A / r of B)^4. That comes out to (1/.78)^4 = 2.7%. I believe my calculations...
Homework Statement
The diameter of a certain artery has decreased by 22% due to arteriosclerosis.
(a) If the same amount of blood flows through it per unit time as when it was unobstructed, by what percentage has the blood pressure difference between its ends increased?
(b) If...
Ah HAH! The perpendicular distance is simply L (I had circular motion in mind, I suppose). Set them equal, L drops out, get 9.618 m/s! Your help has been much appreciated. Hopefully I'll be able to help out someone here with a similar problem sometime. Thank you.
Unless I'm missing something, I'm pretty sure I included the cross-sectional area. .1 square centimeter is equal to .00001 square meters. Multiply that times the constant 1.3. Multiply that by v^2 and get .000013v^2. Are you saying that I have to multiply the whole thing again by the...
Ok, TorqueWind should be equal to (.000013)(v^2) * (.5867*L).
Since we aren't using rFsin(theta) for this one, I'm presuming TorqueWeight should be equal to (.0007056N) * (.5867*L). Since I'm dealing with two variables, I don't really think I can add them and set them to zero.
Thanks for the guidance, Jay.
Ok, so following your first set of instructions (using Ltan(theta)), I come up with the following diagram. Please let me know if this is incorrect:
http://img148.imageshack.us/img148/8464/physicsbugck1.jpg
I realize I could get a value for the hypotenuse...
Homework Statement
The posture of small animals may prevent them from being blown over by the wind. For example, with wind blowing from the side, a small insect stands with bent legs; the more bent the legs, the lower the body, and the smaller the angle . The wind exerts a force on the insect...