# Search results

1. ### Graphing Wavelength vs Inverse freq. or Period

According to our lab manual, the graph of Wavelength vs Period : the slope should be the speed of sound. Well, I have a negative slope of -32.2 which is ridiculous, but I can't find out what I'm doing wrong. We had 5 tuning forks , say for instance, 512Hz...the inverse 1/f = 1/512= 0.00195 ...
2. ### Binary Stars mass calculation

Homework Statement Centauri A and Centauri B are binary stars with a separation of 3.45x10^12m and a period of 2.52x10^9s Assuming the two stars are equally massive (which is approximately the case), determine their mass. Homework Equations ( m1 + m2 ) P^2 = ( d1 + d2 )^3 = R^3...
3. ### Kepler's Laws homework

What worked? I've been trying to figure out how you went wrong for an hour...what did you change?

got it
5. ### Gravitational Force of Three Identical Masses

Homework Statement Three identical masses of 550 each are placed on the x axis. One mass is at X1= -10.0 , one is at the origin, and one is at X2= 43.0 . What is the magnitude of the net gravitational force on the mass at the origin due to the other two masses? G = 6.673 x 10-11...
6. ### A Bar Suspended by Two Wires

Homework Statement A nonuniform horizontal bar of mass m is supported by two massless wires against gravity. The left wire makes an angle (phi) with the horizontal, and the right wire makes an angle . The bar has length L. What is the position of the center of mass of the bar, measured as...
7. ### Point particles

Thanks Doc Al!
8. ### Point particles

nvm, I just used what they were asking me to use, I just assumed the program knew that m_1 was lighter than m_2 and I was assuming correctly.
9. ### Point particles

I have a homework question that is referring to a pivot rod with unequal masses. The spheres are small enough that they can be considered point particles. what exactly does this mean? I know how to solve the equation, but I'm assuming I can't use the I=2/5mr^2 to solve it. If the...
10. ### Problem 8.77 A Flea's Jump

ahh... 1/2kx^2 = 1/2mv^2 then plug into 1/2mv^2=mgh h= v^2/2g
11. ### Problem 8.77 A Flea's Jump

I'm trying to use hooke's law for the spring in the flea's legs. which would be F=kx F=(26N/m)(2x(for each leg)(0.0001m) I got a force of 0.0052 I thought of using PE=mgh, the only equation I know of that would give me the height. I'm sure it's...
12. ### Problem 8.77 A Flea's Jump

So you don't know the answer? I have plenty of work on my paper, but it's all chicken scratch.
13. ### Problem 8.77 A Flea's Jump

The resilin in the upper leg (coxa) of a flea has a force constant of about 26 N/m, and when the flea cocks its jumping legs, the resilin in each leg is stretched by approximately 0.10mm . Given that the flea has a mass of 0.55mg , and that two legs are used in a jump, estimate the maximum...