Science & Mathematics - 30 October 2006

2006-10-30 10:09:10 · 5 answers · asked by shawn 2 in Biology

I'm doing a report for my earth science class and I need to know who found it and when. If anyone knows, it'd help a lot. Thanks.

2006-10-30 10:08:09 · 5 answers · asked by Anonymous in Earth Sciences & Geology

Two snowy peaks are h = 850 m and 750 m above the valley below. A ski run extends down from the top of
the higher peak and then back up to the top of the lower one, with a total length of 3 km and an average slope
of 30°. A skier starts from rest on the higher peak. If the snow is slick so that friction may be neglected, at
what speed will he arrive at the top of the lower peak if he just coasts without using his poles?

2006-10-30 10:07:22 · 2 answers · asked by Shane H 2 in Physics

what is the answer tooo........
1. Find the 90% of 110
2.Find the 152.09-61.87.
3.Find 1/8 +1/6.
4. find 400 to the power of 3.

2006-10-30 10:07:18 · 5 answers · asked by Connie 1 in Mathematics

We just did a lab in biology on chromatography. We used a collard green plant.

The band of colors I got were

1. Dark Green
2. Yellow Green
3. Bright Greem
4. Faint Yellow
5. Bright Yellow

I'm pretty sure bands 1 and 2 are chlorophyll a and chlorphyll b respectively, but I'm not sure what bands 3-5 are. They are supposed to be xanthrophyll and carotenoids, but there is no orange to be found. I thought that was the color these bands were supposed to be... So what are bands 3-5?

And from least to greatest which bands would be the longest? I found a chromatography picture on the internet http://regentsprep.org/Regents/biology/units/homeostasis/chromatography.jpg, and it has chlorophyll a longer than b, but my results were vice versa. Thanks in advance for your help.

oh, and do you think the reason I didn't have orange band colors is because I used collard greens and for some reason they may have less carotenoids then other plants?

2006-10-30 10:07:06 · 2 answers · asked by gravytrain036 5 in Biology

will oxidation of lead change it's mass, increase or decrease?

2006-10-30 10:05:04 · 3 answers · asked by yeye 1 in Chemistry

Ineedto now ifanimals that get clone....Do they have the same thought?

2006-10-30 10:03:59 · 6 answers · asked by luz r 1 in Zoology

I was assigned this question for homework and got it wrong. How do I answer it?

A projectile is fired with initial velocity of v(subscript 0) feet per second. The projectile can be pictures as being fired from the origin into the first quadrant, making an angle theta with the positive x-axis. If there is no air resistance, then at t seconds the coordinates of the projectile (in feet) are x=v(subscript 0)tcos(theta) and y= -16t(squared)+v(subscript 0)tsin(theta). Suppose a projective leaves the gun at 100 ft/sec and theta=60 degrees.
A. What are the coordinates of the projectile at time t=4 seconds?
B. For how many seconds is the projectile in the air?
C. How far from the gun does the projectile land?
d. What is the maximu height attained by the projectile:
e. Find an expression in terms of v(subscript 0) and theta for the time in the air.
f. Find an expression in terms of v (subscript 0) and theta for the distance from the gun.

2006-10-30 10:03:58 · 3 answers · asked by Anonymous in Mathematics

2006-10-30 10:03:35 · 5 answers · asked by Anonymous in Physics

2006-10-30 09:59:41 · 4 answers · asked by christiangirl_63 1 in Mathematics

2006-10-30 09:57:49 · 9 answers · asked by Anonymous in Zoology

Stuck on a chem question... any input would be greatly appreciated. Working on the separation of components of a mixture... Thanks!

2006-10-30 09:57:40 · 2 answers · asked by Erin B 1 in Chemistry

It borders Pennsylvania, for Christ's sake. It's nowhere CLOSE.

2006-10-30 09:56:55 · 11 answers · asked by Anonymous in Geography

I mean cheap. Cheap and easy. I am not as conscerned about quantity, just quality, and nothing like a car radiator that will poison me. I know of the dangers of this but i would like to try this out as an expiriment without spending much money or time in the process of creating a still. Thanks for any help!

2006-10-30 09:55:17 · 3 answers · asked by Anonymous in Chemistry

I can't seem to find the chemical composition/formula, it's streak, shape, specific gravity/density, or how it's mined. Could you please help me?

2006-10-30 09:53:25 · 5 answers · asked by frojanketh 2 in Earth Sciences & Geology

2006-10-30 09:51:35 · 4 answers · asked by equestrian423 1 in Other - Science

About Me
Member since: October 30, 2006
Total points: 96 (Level 1)
Points earned this week:

Total answers:
Best answers: Determining a Spring force?
A massless spring is between a 1-kg mass and a 3-kg ,mass, but is not attached to either mass. Both masses are on a horizontal frictionless table. In an experiment, the 1kg mass is held in place and the spring is compressed by pushing on the 3-kg mass. The 3kg mass is released and moves off with a speeed of 10 meters per second.

How do I determine teh final velocity of each mass relative to the table after the masses are released?

2006-10-30 09:51:27 · 2 answers · asked by Alex S 2 in Physics

What do the different streaks of color represent in the night sky???

2006-10-30 09:50:06 · 3 answers · asked by Thomas M 2 in Astronomy & Space

I need to find the integral from x=0 to x=pi/8 of sin(4x)

2006-10-30 09:49:03 · 5 answers · asked by Anonymous in Mathematics

2006-10-30 09:48:06 · 5 answers · asked by kate b 1 in Biology

I feel watched by those sorry m*ther f*ckers. i didnt even do anything wrong today yet and i live in LA so i know there are no stars in the sky
What are they thinking making me so nervous. My cousin Nick told me it is a planet called mars but i think he is a liar too

2006-10-30 09:48:06 · 8 answers · asked by Anonymous in Astronomy & Space

The outside frame (body)

2006-10-30 09:45:49 · 4 answers · asked by AGUILAR A 1 in Astronomy & Space

Using the letters A, B, and C, how many differnent three letter codes can u find?

please help
<333
xPPPPPPPPPPPPPPP

2006-10-30 09:45:30 · 4 answers · asked by (: 2 in Mathematics

2006-10-30 09:45:09 · 11 answers · asked by EyasOo 2 in Zoology

The other three forces seem to hold together mass with utmost strength,while gravity pulls it all together???......Tom Science 3

2006-10-30 09:43:50 · 3 answers · asked by Thomas M 2 in Physics

With the end of daylight saving time in the United States (and elsewhere), my atomic clocks reset themselves back to standard time. My question is does the clock do this because of some programming in the clock itself, or is it because of the signal broadcast by NIST? The reason that I'm wondering is because the start and end dates for daylight saving time will change beginning next year, and I'm wondering if the atomic clocks will give the right time unadjusted.

Thanks in advance for your answers.

2006-10-30 09:42:17 · 6 answers · asked by Ѕємι~Мαđ ŠçїєŋŧιѕТ 6 in Other - Science

Is it plastic or organic? If so, what specifically?

2006-10-30 09:38:31 · 3 answers · asked by kumo 1 in Chemistry

the pressure of atmosphere is 1 atm while there is not any air pressure in the space and then molecules of air gases tend to escape from the earth to the space(gradually though).but why after millions and millions of years, we have still air on the planet.
And will be one day when there is not any air left on the planet earth?

2006-10-30 09:35:58 · 7 answers · asked by Ormoz 3 in Physics

2006-10-30 09:35:27 · 1 answers · asked by hannahsworld3 1 in Weather

2006-10-30 09:35:22 · 4 answers · asked by pabadewa 1 in Zoology