Recent content by mcnealymt

Does anyone know what the speed of sound in aluminum rod is??!

Homework Statement The figure is a snapshot graph at t = 0s of two waves approaching each other at 1.0 m/s. Draw six snapshot graphs, stacked vertically, showing the string at 1s intervals from t = 1s to t = 6s. Homework Equations...

The length was given. It is 2m. My question is how do I find the speed of sound in an aluminum rod.

This information I found on yahoo answers: So we need to find the speed of sound in aluminum. See second web site. f = (4877 m/s) / (2∙1.90m) f = 128.2 s^-1 = 128.2 Hz

Homework Statement A longitudinal standing wave can be created in a long, thin aluminum rod by stroking the rod with very dry fingers. This is often done as a physics demonstration, creating a high-pitched, very annoying whine. From a wave perspective, the standing wave is equivalent to a...

Homework Statement I'm very confused as to when your supposed to add up or down when a number follows a five. Homework Equations The Attempt at a Solution For instance, round 5.65 to 1 decimal. THe answer is 5.6, isn't this because when an even number is followed by a five...

Homework Statement A rocket is launched straight up from the Earth's surface at a speed of 1.80×104m/s . What is its speed when it is very far away from the earth? Answer in m/s Homework Equations K1+U1=K2+U2 The Attempt at a Solution .5mV1^2-(G*m*Me)/r= .5mV2^2-(G*m*Me)/r *** THe mass of...

Okay for part A) I found the radius and can use the equation T= (2pi*r)/v . B) How does the age of the solar system help me? It just states an age and nothing else. C) & D) The equation is g= (G*m1*m2)/r^2 However, what would be the mass of the galactic center in this equation?

Homework Statement The solar system is 25,000 light years from the center of our Milky Way galaxy. One light year is the distance light travels in one year at a speed of 3.0*10^8 m/s. Astronomers have determined that the solar system is orbiting the center of the galaxy at a speed of 230...

After I take the cross product what do I do? I know that the equation L= *m*v*r*p and there's another one ABsin(beta)K-hat.

Homework Statement http://session.masteringphysics.com/problemAsset/1070538/5/12.EX46.jpg a)What is the magnitude of he angular momentum of the 200g particle relative to the origin. b) What is the direction of the angular momentum relative to the origin of the 200g particle? Into the page or...

Thank you Doc Al, I appreciate it. Have a nice day.

That makes sense, for some reason I was trying to find the center of mass which is completely irrelevant. The distances I used were for a were: (.1kg)(.1m)^2+ (.1kg)(.1m)^2 The distance used for b was .08m (found using Pythagorean) (.08m)^2(.2kg)

Homework Statement a)Find the moment of inertia about an axis that passes through mass A and is perpendicular to the page. In kg m^2 b)Find the moment of inertia about an axis that passes through masses B and C.In kg m^2 http://session.masteringphysics.com/problemAsset/1070524/4/12.EX16.jpg...

Thank you, I highly appreciate it.