Recent content by vivekfan

Well, could you help me work through this problem... A speaker is producing a total of 5 W of sound, and you hear 10 dB. Someone turns up the power to 50 W. What level of sound do you hear? (a) 10 dB, (b) 15 dB, (c) 100 dB, (d) 40 dB, (e) 20 dB I don't know why I plugged in 50/5 for I...

Does that mean that the standing wave has the same wavelength as the original?

Homework Statement In the equation Beta=10log (I/I (initial) is the I inital always the incident intensity 10^-12? Or if you are moving from one intensity to another, then can the initial intensity be the one you were initially at? For example, if you were moving from an intensity of 5 to...

Homework Statement If a standing wave is produced by two identical waves traveling in opposite directions, is the wavelength of the resultant wave simply the wavelength of the original wave? Homework Equations ysin(kx)cos (wt) The Attempt at a Solution I'm pretty sure it...

Could you explain Pascal's principle? What is an incompressible fluid and how is a change in pressure applied to an incompressible fluid independent of height?

Homework Statement 1. Is pressure always force/area? or is it only for static fluids? 2. I read that the equation for hydrostatic pressure is (initial pressure) + density x gravity x height, but How would I know to use that instead of Force/Area? Also is the initial pressure always atmospheric...

How do you know what the wavelength of the resulting wave is?

Homework Statement 1)Two Traveling Waves y1=Asin[k(x-ct)] and y2=Asin[k(x-ct)] are superimposed on the same string. What is the distance between adjacent nodes? 2) Standing Waves are produced by the interference of two traveling sinusoidal waves, each of frequency 100 Hz. The distance...

Homework Statement Please explain the difference and try to give examples. I know that the displacement of the medium in a transverse wave is perpendicular to the direction of wave travel and in longitudinal is parallel to the direction of wave travel, but does this mean that transverse waves...

Homework Statement 1. Do you use the equation of continuity and Bernoulli's equation simultaneously in a question? When do you use them? 2. In simple harmonic motion, why is the velocity shifted to left of the displacement by pi/4? Homework Equations pressure + .5density x velocity...

So, you always look at the perpendicular distance from the axis of rotation? Thank you so much for all of your help! I really appreciate it.

Oh, I am pretty sure I understand now. Because torque can only act perpendicular by the definition of the cross product, right? Would you mind working the problem out, so that I can make sure my work is consistant? Thanks! I just want to make sure everything is correct, so that when I review...

Why isn't the vertical force of B acting at point B...how is it acting at Point A?

So does this mean that in the x-direction, there is the normal force from the wall on A and a normal force on the wall on B, and in the y-direction, there is the rope tension and the vertical forces from rod A and B? So then if you consider A the axis of rotation, then there would be no need to...

Why would I make the axis of rotation B, if I'm trying to solve for the normal force exerted on B? And which forces would I use in each direction in writing the sum of forces. I don't think I'm really understanding...are you considering the whole system or just rod B?