Recent content by jrrodri7

Homework Statement Two Loud speakers are placed on a wall 3.79 meters apart. A listener stands directly in front of one of the speakers, 65.6 meters from the wall. The speakers are being driven by the same electric signal generated by a harmonic oscillator of frequency 4010 Hz The speed of...

Homework Statement Assuming the speed of sound is 338 m/s: A bat moving at 6.2 m/s is chasing a flying insect. The bat emits a 53 KHz chirp and receives an echo at 53.6 KHz. At what speed is the bat catching up on its prey? Homework Equations f^{'}=[ (V_{Air} + V_{observer}) /...

crane static problem... Homework Statement A 25-ft. crane supported at its lower end by a pin is elevated by a horizontal cable. A 250 lb. load is suspended from the outer end of the crane. The center of gravity of the crane is 10 ft. from the pin, and the crane weighs 200 lbs. What is the...

conservation of rotating object energy?hmmmm okay.

the derivative is 12t - 3t^(2). That is velocity, now to maximize the equation take the derivative of it? and use that to plug into the other one?

Homework Statement Identical particles are placed at the 50-cm and 80-cm marks on a meter stick of negligible mass. This rigid body is then mounted so as to rotate about a pivot at the 0-cm mark on the meter stick. If this body is released from rest in a horizontal position, what is the...

ya i figured the derivative of position is velocity right, but I tried doing that and then using that as galileo's equation of motion, substituting the 12 and 3 for velocity and acceleration...but i kept getting numbers that didn't make sense.

Homework Statement The position of a particle moving along the x-axis is given by x = 6.0t^{2} - 1.0t^{3} , where x is in meters and t in seconds. What is the position of the particle when it achieves its maximum speed in the positive x direction? Homework Equations motion...

OH it'd be F1/A1 = F2/A2, and you I would have to convert to m^2, by X100 but squaring them? you mean make it into flat out (m)?

Oh, so it's similar to the case of the fully sugmerged object, only with different densities given and g is negligible.

Homework Statement The small piston of a hydraulic lift has a cross sectional area of (2.8 cm^2), and the large piston connected to it has an area of (17 cm^2). What force of F must be applied to the smaller piston to maintain a load of (28000 N)? Homework Equations A_1 * V_1 = A_2...

I'm arriving at something along the lines of p_1*g*h_1 = p_2*g*h_2 because of the differences in density and solved for h_1. Making sure it's all consistent obviously.

oh nevermind, the density's are different.

Oh, make it static, maybe...A1v1 - a2v2 for continuity as well?

Homework Statement A simple U-tube that is open on both ends is partially filled with a liquid of density (491 kg/m^3). Water is then poured into one arm of the tube, forming a column height of (8.2 cm). The density of the heavy liquid is (1000 kg/m^3). What's the difference , h, in the...