Recent content by Eternalmetal

Bump. I still need help with this, I put in a bunch of time and I am still lost. I would really appreciate a formula or concept explanation or anything, I have the answer but I just want to know how to do it.

I am not exactly sure, but you might be able to use the equation v = sqrt(Forcetension/(m/L)). I don't know how you derive this formula, but this is one of the formulas they give in my physics book (im actually doing the same thing right now in my class), so this should be what your looking...

Homework Statement The intensity at a distance of 6.0m from a source that is radiating equally in all directions is 6.0x10^-10 W/m^2. What is the power emitted by the source? They give you multiple choice answers, and the answer is 2.7x10-7 W. Homework Equations I is...

Considering my teacher made up the question, I don't see the irony :lol:

Kind of, although I am also unsure of exactly what she is asking. My teacher is vague like that.

1. How do various distances influence the angular velocity of earth? Tangential velocity? explain Homework Equations 3. For some reason, I tend to think that distance doesn't relate, but I do not know where to begin to explain. I also could not find the answer in my physics book.

Interesting, I rechecked my work plugging in 311040 for T, 4.9E22 for one of the masses, and 6.7E8 m for the radius, and did indeed get it wrong, again. I tried this time, following your formula and got it right. Sorry for my stupidity, I've just been extremely stressed out lately. I hope I...

What did you use/how did you calculate the "a" value? (I am assuming you mean radius, at least that's how we learned it).

1. Europa was one of the moons discovered by Galileo. It has a mass of 4.9E22 kg and a period of 3.6 days and distance of 6.7E8 m. What is the mass of Jupiter? 2. 3.6 days = 311040 sec F = G m m / r^2 F = Mv^2 / r T^2 = (4pi^2/Gm) R^3 3. I threw the numbers into Kepler's formula and get a...

I have to use hookes law and kinetic/potential energy and such. As you can see, I am ****ing lost. I would really appreciate any help that involves using hookes constant. I have found 2 formulas, but i don't know if I could equate them in this specific case elastic PE = 1/2 kd^2 KE = 1/2...

I don't ever recall seeing that equation before. I am sure this is not a difficult problem, but I can't get it for the life of me.

1. A guy us riding a tricycle at 33kg at 12m/s when it strikes a spring and is brought to rest in 1.6m. Compute the proportionality constant and explain the type of energy, types of forces, and Hookes law applied 2. F = k(elongation) I am sure there are others. 3. my problem...

If I were determining the mass of a black hole, would I do it the same way as if it were a planet?

My mistake, I guess I was being a little careless. Thanks again for your help, we definitely did not go over this in lecture. Now that I realize what this is, it is a chapter that we did not cover yet, we were actually going over circular motion instead.

Ah, if I am not mistaken, would it be 2Pi radians in one revolution? So I would multiply 3.3 revolutions/sec by 2Pi to get about 20.73 radians/sec, and then divide by .23 like I did previously and get a final value of 90.15 radians/sec² ? Thanks for your help Doc Al.