Science & Mathematics - 23 September 2007

why does their activity decrease when the temp gets too high?!?!

2007-09-23 15:33:59 · 3 answers · asked by THE ICE AGE 2 in Biology

I need the name of an enzyme that has helped society (or just people in general) Im trying to research some but no luck!

2007-09-23 15:28:52 · 2 answers · asked by Alloy 2 in Biology

^ yup thats the question...

i need a small, simple, and accurate answer...

Do reply fast please!! Thanks in advance!!!!

2007-09-23 15:27:55 · 3 answers · asked by abbi 3 in Weather

The term _______ refers to the entire set of genes derived from one parent.
a) dominant genes
b) gamete
c) genome
d) deoxyriboneucleic acid

I think is B- gamete. Anybody?

2007-09-23 15:21:14 · 6 answers · asked by Alan l 1 in Biology

A particles position is given by the following expression:

r(t) = Rcos(wt)i + Rsin(wt)j

The magnitude of the velocity, |v(t)| (speed) is given by the expression:

sqrt((-Rwsin(t))^2 + (Rwcos(t))^2)

?Express the magnitude of the particle's acceleration in terms of R and v using the expression obtained for the speed of a particle?

____________________________

Please try to be concise and neat. Explain your steps if you can. Thanks in advance.

2007-09-23 15:13:46 · 1 answers · asked by Gills 1 in Physics

These problems have been driving me crazy for a while and I am still clueless of how to work them out.

Here are the problems:
http://img477.imageshack.us/img477/4169/help1dw1.png

There are only 3.

I'm not expecting nor asking you to directly give me the answer, (I hope you won't!)
I just want to know what steps I would need to make in order to get the answer. Like how exactly do I solve the problem?

2007-09-23 15:10:06 · 6 answers · asked by Anonymous in Mathematics

2007-09-23 15:06:58 · 9 answers · asked by Anonymous in Biology

Can someone validate this problem for me:

1. Write the product in standard form: (5x-9y) (5x+9y)

---Well, i know that you have to square both the first and last terms seperately, so: First term = 5x, Last term = 9y.

(5x-9y) (5x+9y) = (first term)^2 and (last term) ^2.
= (5x)^2 and (-9y)^2
= 25x^2 + 81y^2

......Is my answer correct, if not please tell me where my mistake was. I would really appreciate it.

2007-09-23 15:06:43 · 5 answers · asked by dana c 1 in Mathematics

haahaa im sooo stupid! lol i cant find it in the textbook...its so confusingly written...anyone have a very simple, short answer?? PLEASE reply!! Thanks in advance...

2007-09-23 15:06:25 · 2 answers · asked by abbi 3 in Geography

line 1 passes through (1,1,0) and parallel to the vector v=<1,-1,2> and line 2 passes through (2,0,2) and parallel to w=<-1,1,0>.

2007-09-23 15:05:10 · 3 answers · asked by Delores S 1 in Mathematics

i am thinking it has something to do with plate tectonics but i cant seem to find the answer.......please help me......thank you......

2007-09-23 15:03:44 · 5 answers · asked by ¸.•*´`*♥ღAღ♥*´`*•.¸ 3 in Earth Sciences & Geology

If plant cell has lower water potential than its surrounding environment and if pressure equals zero,
-is the cell hypertonic ( in terms of solute concentration) or hypotonic to its environment?
- Will cell gain or lose water?
-Explain
---------------------------------------------------
A beaker contains a dialysis bag containing 0.1% sucrose solution submerged in a 0.4% sucrose solution.
- Is the greatest water potential inside the beaker or bag?
- Will water move into or out of the bag?

2007-09-23 15:03:33 · 4 answers · asked by Anonymous in Biology

It's for Biology and we're building this cell city. I'm pretty much done with it but I need something that is supposed to represent an endoplasmic reticulum (ER), any suggestions?

P.S. It's like I have a cell wall as a fence in my city, that sort of thing. Again, thank you!!, lol. l:D.

2007-09-23 15:02:42 · 3 answers · asked by Addie M. 1 in Biology

2007-09-23 15:01:26 · 1 answers · asked by Moony 2 in Botany

Acceleration is generally defined as the time rate of change of velocity. When can it be defined as the time rate of change of speed?

2007-09-23 15:01:20 · 1 answers · asked by Anonymous in Physics

i need this by 10:30 tonight

2007-09-23 14:59:38 · 4 answers · asked by Joshua M 1 in Biology

2007-09-23 14:57:11 · 6 answers · asked by Anonymous in Biology

My science teacher asked me to find out for extra credit.

2007-09-23 14:56:33 · 11 answers · asked by <3 1 in Astronomy & Space

I read an article that Armstrong saw life on the moon.Professor:What really happened out there with Apollo 2?Armstrong:It was incredible.Ofcourse we had always known there was a possibility,the fact is we were warned off by the aliens.There was never any question then of a space station or a moon city. Also,that ufos were seen and they were big!That the moon landings shots are all fakes.Could that be true?

2007-09-23 14:55:05 · 12 answers · asked by Life goes on... 6 in Paranormal Phenomena

A common flea is recorded to have jumped as high as 21 cm. Assuming that the jump is entirely in the vertical direction and that air resistance is insignificant, calculate the time it takes the flea to reach a height of 7.0 cm. if this is the maximum height of the jump. Please show how you got the answer. I really need this tonight. Thanks!!!

2007-09-23 14:53:36 · 1 answers · asked by ☺♠JonasJay♫♦ 5 in Physics

was the grand canyon caused by weathering? For a project I need a picture of weathering and was wondering if the grand canyon would work?

2007-09-23 14:52:50 · 4 answers · asked by Surfing_is_life 2 in Earth Sciences & Geology

I've followed the answers of similar questions, but still seem to come up w/ the wrong answer, please help! :(

A basketball player 1.99m tall wants to make a basket from a distance 12.7m. The hoop is at a height of 3.05m.

If he shoots the ball (from a height of 1.99m) at a 61.7deg angle, at what inital speed must he throw the basketball so that it goes through the hoop w/o striking the backboard? .. answer in units m/s

2007-09-23 14:50:35 · 1 answers · asked by Anonymous in Physics

I cannot find this answer. I have been searching and searching. if you know it please tell me. your answer will be greatly appreciated......thank you..........

2007-09-23 14:50:35 · 12 answers · asked by ¸.•*´`*♥ღAღ♥*´`*•.¸ 3 in Astronomy & Space

2007-09-23 14:45:22 · 2 answers · asked by samira k 1 in Zoology

if you like, poked holes for head,feet and arms in a weather balloon, and get in, do you think i'll inflate?

2007-09-23 14:45:03 · 3 answers · asked by lucariojr 1 in Physics

by using gear reduction, could a generator recharge electric car batteries?

2007-09-23 14:44:58 · 2 answers · asked by sparkelcrete 1 in Engineering

id appreciate it

2007-09-23 14:40:50 · 2 answers · asked by Robert 1 in Mathematics

if it depends on rate, how so? if the temperature drops in the empty one, by how much?

2007-09-23 14:40:17 · 5 answers · asked by Anonymous in Engineering

I was thinking, since you're further away from the Earth, is gravity less (even by a fraction of a percentage) in an aiplane?

2007-09-23 14:39:57 · 5 answers · asked by Jeff W 1 in Physics

2007-09-23 14:37:58 · 13 answers · asked by H.A.L 3 in Biology