Science & Mathematics - 7 December 2006

The motion of an object is described by the equation:
x=(0.7m) cos(pi*t / 4)
At .07 sec, x = .5968115 m
1. What is the frequency of the motion? (answer in units of Hz)
2. What is the period of the motion? (answer in units of s)

2006-12-07 11:07:01 · 1 answers · asked by smb473 1 in Physics

what was da vinci's principle of flight/ aviation?
thank you!

2006-12-07 11:06:50 · 1 answers · asked by gabb 2 in Engineering

2006-12-07 11:06:06 · 9 answers · asked by SkAnDaL 1 in Chemistry

2006-12-07 11:05:49 · 3 answers · asked by Schnickyyy 1 in Mathematics

and in the other, if one goes out the rest are still on? which is which?
series circuit? parallel circuit?

2006-12-07 11:04:21 · 3 answers · asked by Anonymous in Engineering

NEED HELP FAST

2006-12-07 11:03:15 · 3 answers · asked by LaTisha K 1 in Chemistry

2006-12-07 11:02:36 · 25 answers · asked by Jennifer 1 in Chemistry

What two simple machines make a scissors a compound machine?

2006-12-07 11:02:20 · 2 answers · asked by typicalbutiluvyou 2 in Physics

The formula P=14.7e^(-0.21x) gives the average atmospheric pressure P in pounds per square inch , at an altitude x in miles above sea level. Find the elevation at which the average atmospheric pressure is 2 lb/in^2

"^" signifies an exponent

2006-12-07 11:00:51 · 4 answers · asked by Anonymous in Mathematics

C60H60 + O2 = CO2 + H2O

2006-12-07 11:00:13 · 7 answers · asked by Hiawatha 2 in Chemistry

You know, you gave a DNA Swab, next thing you discover that you have clone walking around, looks exactly like you, talks like you, walks like you, what would you do about it ?

2006-12-07 10:58:34 · 9 answers · asked by Latin Techie 7 in Biology

Please explain.

2006-12-07 10:57:19 · 2 answers · asked by Anonymous in Mathematics

If 5 ounces is equal to 140 grams, then 2 pounds of ground meat is equal to how many grams

2006-12-07 10:55:27 · 5 answers · asked by jenny 1 in Mathematics

A 50 KG Pole Vaulter running at 10 m/s vaults over the bar. Her speed when she is over the bar is 1.0 m/s. Neglect air resistance, as well as any energy absorbed by the pole, and determine her altitude as she crosses the bar...


?


I thought I got this question when I was reading it but then it said to find altitude and I was just like ooo kkkkk..... kkkkkk

2006-12-07 10:55:15 · 3 answers · asked by Twilight Is Love 1 in Physics

i really need to know for my powerpoint for chemistry

2006-12-07 10:51:23 · 2 answers · asked by Anonymous in Chemistry

Here is the problem with the possible answers:

Calculate the approxiamte volume of a 0.600 mol sample of a gas at 15.0° C and a pressure of 1.10 atm.

a. 12.9 L
b. 22.4 L
c. 24.6 L
d. 139 L

2006-12-07 10:50:01 · 3 answers · asked by Anonymous in Chemistry

2006-12-07 10:49:04 · 22 answers · asked by Anonymous in Astronomy & Space

2006-12-07 10:47:21 · 4 answers · asked by no toosure24 2 in Medicine

A simple pendulum, 2 m in length, is released by a push when the support string is at an angle of 25 deg. from the vertical. If the initial speed of the suspended mass is 1.2 m/s when at the release point, to what maximum angle will it move in the second half of its swing?

The answer is 30 deg., I just need to figure out how to get it.

2006-12-07 10:47:20 · 5 answers · asked by this Mike guy 5 in Physics

-3x + 4y = -4
7x - 3y = 22

2006-12-07 10:46:25 · 6 answers · asked by elizabeth 1 in Mathematics

2006-12-07 10:46:21 · 1 answers · asked by Dani Z 2 in Chemistry

2006-12-07 10:45:53 · 4 answers · asked by T T 2 in Zoology

do this word problem a detailed step by step answer gets 10 points:

3x-2=5x+12

2006-12-07 10:45:00 · 5 answers · asked by Michael G 2 in Mathematics

I'm doing a presentation on the history of genetics, and I can't find anything. It may sound like a dumb question to ask but if you can answer ASAP!!!

2006-12-07 10:43:38 · 7 answers · asked by Anonymous in Biology

2006-12-07 10:42:46 · 2 answers · asked by firedupdawg 4 in Biology

2006-12-07 10:42:27 · 3 answers · asked by ghettochic:x 1 in Mathematics

2006-12-07 10:42:10 · 6 answers · asked by lets_go_surfing_baby49 1 in Mathematics

havin a hard time with this one

2006-12-07 10:41:53 · 4 answers · asked by wheniawoke 3 in Mathematics

what is the rate of change of the distance between the ships at 1 pm?

2006-12-07 10:39:56 · 1 answers · asked by calc 101 2 in Physics

OK so lets say the universe is expanding forever. It reaches a point where everything that exists is really really small particals of mater that no longer come into contact with each other physicaly. Would these objects keep on spreading farther apart or would for some reason unknown to me start to come back together? If they keep expanding away from each other is it possible that they would reach a point where they would become unstable and break apart/explode like the big bang only smaller then the one before it?

2006-12-07 10:39:11 · 7 answers · asked by magpiesmn 6 in Astronomy & Space