Recent content by curiousgeorge99

Error bars and slope error ?? Homework Statement I have to construct a graph with three lines. The middle line is 'best fit', one line is 'max slope' the other 'min slope', and error bars need to be drawn. The error for the Y axis is too small to draw so there is only an error bar for X...

My 'g' is calculated to be about 7.1 m/s^2, so its good to know it should be less than 9.8.

Homework Statement Simple question I'm sure, but I want clarification if possible. If you do an experiment with the Atwood machine and you need to calculate 'g', should it be close to 9.8 m/s^2 ? Homework Equations No equations necessary, theoretical question. I would think the Atwood...

Homework Statement What is the minimum work needed to push a 1200Kg car, 118m up 18 degree incline with no friction? Homework Equations I used mgsin18 - mgcos18 (don't think this is right) I know with friction, you do mgsin18 - (coef. friction)(mg)(cos18), and then to get work you...

Homework Statement A molecule has mass 5.3 x 10^-26 Kg and KE 6.24 x10^-21. What is the velocity in m/s? Homework Equations KE = mv^2 / 2 The Attempt at a Solution I plug the numbers into the equation and get an answer of 15.34, but the correct answer is 48.6 m/s. Is this the wrong...

Thank you so much! I see my mistake.

nope, still lost! I think I'm stuck on where to start. I keep trying to figure out the velocity in m/s then convert to rev/min. Is there a better way to do it?

I just copied the question from the book. Didn't see anything about the moon. Do I need to consider that for this question?

That's true, it doesn't sound right does it? However, if the answer is supposed to be m/s2 in the end, wouldn't my calculation for V still be correct? Taking 148022 KM and converting to meters becomes 148022000 M. When multiplied by 6.28, I then get 9.3 X10^8. The number of seconds in a...

Homework Statement Calculate the centripetal acceleration, in units of m/s2, of the Earth in its orbit around the Sun. Assume that the Earth's orbit is a circle of radius 148,022 thousand km. Homework Equations v= 2 pi r/ T Ac = V^2/ r The Attempt at a Solution I solve for V and...

ok, that makes sense! thanks I'm going to see if I can solve this problem now.

No, no idea why. I just have that at the front of my textbook.

Is the relationship between W and rev/min: 0.1047 rad/s = 1 rev/min.

V = displacement / time elapsed, W = number of radians / second Is that right? Acceleration is A = change in velocity / change in time Angular accel. A = change in # of radians / change in time. This is about all I know. I'm not sure how they are related or how you get rev/min from here...

Homework Statement How many revolutions per minute would a 15m diameter Ferris wheel need to make for a person to feel 'weightless' at the topmost point? Homework Equations F= mv~2/r - mg v = 2pi r/ T The Attempt at a Solution I get 8.57 m/s using the equation F= mv~2/r - mg I...