Science & Mathematics - 14 November 2006

A yo-yo has a rotational inertia of 950 g cm^2 and a mass of 120 g. Its axle radius is 3.2 mm, and its string is 120 cm long. The yo-yo rolls from rest down to the end of the sting.

(a) What is the magnitude of its translational acceleration?

(b) How long does it take to reach the end of the string?

As it reaches the end of the string, what are its (c) translational speed, (d) translational kinetic energy, (e) rotational kinetic energy, and (f) rotational speed?

What equations did you use to solve this, and can you explain your answers?

2006-11-14 04:39:41 · 1 answers · asked by Anonymous in Physics

Is the day the longest or the shortest on 22 June on the North Tropic?

2006-11-14 04:39:37 · 2 answers · asked by Kateline F 1 in Geography

Three numbers added together total 68. The second number is four more than the first, and the third number is twice the first. Find the numbers?

2006-11-14 04:39:11 · 7 answers · asked by wanda_brown62 1 in Mathematics

2006-11-14 04:34:35 · 9 answers · asked by samanthavanheerden 1 in Physics

2006-11-14 04:32:51 · 1 answers · asked by goring 6 in Engineering

4x+3y=19
2x-5y=3

Show working. NOT homework!!!

2006-11-14 04:29:33 · 8 answers · asked by Miss LaStrange 5 in Mathematics

2006-11-14 04:29:11 · 1 answers · asked by Gunslinger 2 in Engineering

2006-11-14 04:28:30 · 4 answers · asked by sam w 1 in Chemistry

JAGSHEMASH!

2006-11-14 04:27:31 · 4 answers · asked by kalbabina 1 in Geography

please let me know how to avoid lizards in our houses. they are really troubling my children and doenot look nice to see in house. please tell me a feasible and practically possible solution.

2006-11-14 04:27:13 · 7 answers · asked by satyagandhit 1 in Zoology

2006-11-14 04:25:48 · 3 answers · asked by Dog Person 1 in Geography

this is regarding complex numbers
(\|-1)^2=(\|-1)*(\|-1)
-1=(\|-1*-1)
-1=\|1
-1=+or-1

2006-11-14 04:25:34 · 7 answers · asked by kapai 1 in Mathematics

If the vapor's volume is assumed to be 125 mL instead of the measured volume, what is the percent error of the unknown's calculated molecular weight?

2006-11-14 04:20:42 · 1 answers · asked by HeTrP 1 in Chemistry

All living things die. They have a limit. So, shouldn't Space be limited as well?

2006-11-14 04:18:46 · 7 answers · asked by Raymond 6 in Astronomy & Space

age aprox. 50

2006-11-14 04:17:57 · 5 answers · asked by cowgirlrust 2 in Geography

2006-11-14 04:16:52 · 2 answers · asked by Anonymous in Engineering

I just can't seem to make sense of it.
A trapezoid is inscribed in the upper half of a unit circle.
a)write the area of the trapezoid as a function of the angle theta.
b)Find the value of the angle theta that maximizes the area of the trapezoid and the maximum area.

If somebody could just help explain how to get the first part (a) I would appreciate it.

2006-11-14 04:16:16 · 3 answers · asked by jonesin_am 1 in Mathematics

If the outside of the flask is not dried after vaporizing the liquid, will the unknown's calculated molecular weight is too high ot too low? and explain why ?

2006-11-14 04:16:08 · 2 answers · asked by HeTrP 1 in Chemistry

Hey. Thanks. I'd appriciate it. And try doing that with 1800.

2006-11-14 04:14:07 · 3 answers · asked by Anonymous in Mathematics

2006-11-14 04:12:59 · 4 answers · asked by Lindsay A 1 in Chemistry

Wheat is cultivated in abundena and it is been exported to different places.

2006-11-14 04:09:52 · 3 answers · asked by manoj n 1 in Botany

2006-11-14 04:09:46 · 2 answers · asked by Lindsay A 1 in Chemistry

4x+3y= 19
2x+5y=3
Show your working

This is NOT homework!!!

2006-11-14 04:09:18 · 12 answers · asked by Miss LaStrange 5 in Mathematics

2006-11-14 04:08:03 · 11 answers · asked by redhollywooddogs 1 in Mathematics

2006-11-14 04:07:33 · 2 answers · asked by Lindsay A 1 in Chemistry

Consider a 66-cm-diameter tire on a car traveling at 80 km/h on a level road in the positive direction of an x-axis.

Relative to a woman in the car, what are (a) the translational velocity v and (b) the magnitude a of the translational acceleration of the center of the wheel?

What are (c) v and (d) a for a point at the top of the tire?

What are (e) v and (f) a for a point at the bottom of the tire?

Now repeat the questions relative to a hitchhiker sitting near the road: What are (g) v at the wheel’s center, (h) a at the wheel’s center, (i) v at the tire top, (j) a at the tire top, (k) v at the tire bottom, and (l) a at the tire bottom?

What equations would you use to solve this, and can you show your work?

2006-11-14 04:06:09 · 5 answers · asked by Anonymous in Physics

MY QUESTION IS WITH RESPECT TO IMAGINARY NUMBERS OR COMPLEX NUMBERS IN MATHEMATICS

2006-11-14 04:05:24 · 5 answers · asked by kapai 1 in Mathematics

how do you determine the acceleration of a block that weighs 20kg down a ramp at a 15 degree angle. I need to know the equation to use for this. thanks!

2006-11-14 04:03:38 · 4 answers · asked by Anonymous in Mathematics

Please describe them for me. Best answer gets 10 points. Thanks!

2006-11-14 04:03:20 · 6 answers · asked by Anonymous in Geography

2006-11-14 04:00:50 · 15 answers · asked by jazzNB 1 in Geography