Recent content by blazin247nc

OK, I see what I was doing wrong now. I got 600 kg/m^3 as the density of the mystery fluid. Seems like a more reasonable answer than -200 :P

Fluid Mechanics -- Floating Bodies Homework Statement A solid block with specific gravity 0.9 floats so that 75% of the body is submerged in water and the other 25% sits in an unknown fluid layered above the water. Find the specific gravity of the unknown fluid. density of water = 1000...

[MATLAB] -- Getting Error Code: % Define variables for wn and z wn = 5; z1 = 0; z2 = 0.2; z3 = 0.9; z4 = 1; z5 = 2; z6 = 30; % Define transfer functions num = [wn^2]; den1 = [1, 2*z1*wn, wn^2]; den2 = [1, 2*z2*wn, wn^2]; den3 = [1, 2*z3*wn, wn^2]; den4 = [1, 2*z4*wn, wn^2]; den5 =...

doc al...your a genius thank you for your help

since the time is 2.86s then the time of the sound is .14s 343 * .14 = 48.02 48^2 - 40^2 = 704 ... 704^1/2 = 26.5 <---pythagorean theorem x(final)=26.5 x(final)=Vx(initial)*t Vx(initial)=26.5/2.86 = 9.3 The answer in the back of the book is 9.91 so maybe roundoff error?

nm i figured it out ill post my solution in a second

Since it is projected horizontally the angle would be 0 so the initial velocity would be equal to the intial velocity in the x direction. So from here, without the final x position I don't see how I can find the intial velocity.

y(final)=y(initial)+Vy(initial)*t - 1/2(9.8)(t^2) -40= 0 + 0 -4.9t^2 8.16 = t^2 t = 2.86 Since it is projected horizontally the initial velocity in the y direction should be 0 as well as the initial y position, correct?

my original work is as follows: 40/t = 343m/s t=0.117s <--- time the sound takes to relay 3-0.117= 2.88 <---- time for the rock to hit the water. HOWEVER, that is only based on the distance of the y direction and doesn't incorporate how far the rock traveled in the x direction.

Here's a tricky one! Homework Statement A soccer player kicks a rock horizontally off a 40.0m high cliff into a pool of water. If the player hears the sound of the splash 3.00s later, what was the initial speed given to the rock? Assume the speed of sound in air to be 343 m/s. I am...