Science & Mathematics - 14 October 2007

s=4t^3 where t is measured in seconds. Find the average velocity of the particle over the time interval [6,8].
Find the (instantaneous) velocity of the particle when t = 6.

2007-10-14 07:55:31 · 2 answers · asked by simonkf2002 1 in Mathematics

This problem is giving me, well...problems:

f(x) = 3x csc(8 x)

How exactly would one derive this?

2007-10-14 07:55:16 · 3 answers · asked by AppleCard! 2 in Mathematics

2007-10-14 07:54:17 · 3 answers · asked by Squirrley Temple 7 in Geography

Can someone explain to me how to do this problem?

Using the Power Rule, show that the slope of the graph y = x2 at any point x is exactly halfway between the slope of the forward secant on [x, x + h] and the slope of the backward secant on [x−h, x].

Why is this never the case for y = x^3 and y = sqrt(x)

2007-10-14 07:51:14 · 2 answers · asked by Avi J 1 in Mathematics

need help!'
transversal cuts two parallel lines.
given:
m m WHAT IS THE VALUE OF X?

THANKS.

2007-10-14 07:51:06 · 3 answers · asked by Anonymous in Mathematics

2007-10-14 07:49:51 · 1 answers · asked by tommyjoebob 1 in Astronomy & Space

I'm an aspiring writer creating a story in the vein of Ghostbusters, Ghost Hunters, and Buffy the Vampire Slayer. I know that paranormal investigation teams use experts from different fields such as demonology, mediumship, and parapsychology. But what abilities can a Wiccan use to aid in investigations? I REALLY NEED SOME GOOD ANSWERS!!!!!

2007-10-14 07:48:24 · 14 answers · asked by dyoung852003 1 in Parapsychology

When you heat up water on the stove you can see tiny bubbles of oxygen form. THey rise to the surface long before the water begins to boil. Explain what causes these bubbles to form please

2007-10-14 07:43:36 · 4 answers · asked by Cheburashka3 1 in Other - Science

2007-10-14 07:43:00 · 5 answers · asked by bearbear 1 in Mathematics

I've been to wikipedia, but it doesn't say anything about the manufactoring of it. I've googled it, typing in every way I can think of to get it answered, but I can't find anything except it being found naturally in some edible fruits and green and black tea. If you know where it is found in nature besides those, that would be awesome too....

2007-10-14 07:41:26 · 4 answers · asked by Desi 1 in Chemistry

I'm very confused about math...Algebra actually...
Lets say you have 3 consecutive numbers, and the sum of them is 21...
You would do...
x + x + 1 + x + 2 = 21
3x +3 = 21
3x = 18
x = 6
But if you have 3 consecutive odd numbers, you would do x + x + 2 + x + 4...
WHY?!?! If you have 1 as x, then you'll get 1, 3, 5 for the numbers, and it would make sense... But if you have 2, 4, 6, it wouldn't make sense!!!
So basically... I want to know...
1) What's the reasoning behind the 3 consecutive odd numbers thing... Can someone explain how you make the equation?
2) Did I even get the odd numbers equation right?
3) What's the equation for 3 consecutive even numbers?
4) What's the reasoning behind the 3 consecutive even numbers thing? EXPLAIN!!!

THANK YOU!!!
And please don't just repeat what I said... I'm looking for explanations!

2007-10-14 07:40:15 · 6 answers · asked by Dramaqueen8283 1 in Mathematics

this is an algebra question. 8 +sqrt of -20 divided by -4.

2007-10-14 07:38:49 · 2 answers · asked by deb 1 in Mathematics

2007-10-14 07:28:56 · 6 answers · asked by Rafael G 2 in Physics

This is the function: x^3 - x^2 - x - 2

how many complex zeros does this function have?

classify each zero as real, rational, irrational, or imaginary

2007-10-14 07:22:55 · 3 answers · asked by Anonymous in Mathematics

Is there an equation that shows this?

2007-10-14 07:21:25 · 2 answers · asked by de4th 4 in Chemistry

I pull into the driveway between a fence and my house, with not much room to spare. Then the driveway fans out into three spaces: One straight a head, another to the right , and another to the right again. On the far right is a row of hedges where I park. I have no trouble pulling in without hitting the hedges. However when I pull out, I can barely get the back end of the car between the fence and the house without scratching the right front fender on the hedges. Related to this is the question: Is backing up a reciprocal function to going forward? In other words, if I could replicate my steering when backing up (in relation to distance traveled), would the car go over the same path? If the answer is yes, then I just need to improve my driving skills. But I suspect that since the car is wide in relation to the spaces involved, it may not be reciprocal.

2007-10-14 07:19:20 · 2 answers · asked by Anonymous in Mathematics

If everything is either a solid, liquid or gas. What would electricty be? I hope my question is clear enough.

2007-10-14 07:14:08 · 6 answers · asked by Anonymous in Engineering

2007-10-14 07:13:34 · 2 answers · asked by amityville3132002 1 in Chemistry

What volume of HCN(g) can be obtained from 70.0 L CH4(g), 70.0 L NH3(g), and 70.0 L O2(g)? The volumes of all gases are measured at the same temperature and pressure.

The Chemical Formula is
2CH4(g) +2NH3(g) + 3O2---->2HCN+ 6H2O

2007-10-14 07:13:01 · 1 answers · asked by s.weiss 1 in Chemistry

2007-10-14 07:12:30 · 14 answers · asked by Anonymous in Engineering

If the midpoints of the sides of a triangle are connected, the area of the triangle formed is what part of the area of the original triangle?

2007-10-14 07:10:20 · 9 answers · asked by Andreas 1 in Mathematics

radius of the curve is 20m

2007-10-14 07:03:29 · 1 answers · asked by Anonymous in Physics

function: f(x) = x^3 - x^2 - x - 2

1. list all possible rational roots

2. find all real rational roots

3. find any irrational roots (exact values where possible)

4. find imaginary roots of function (exact values where possible)

5. How many complex zeros does your function have? classify each zero as real, rational, irrational, or imaginary.

6. write your function as a linear factorization

7. describe the intervals of increase and decrease

8. find local max and min

9. find where f(x) < 0, f(x) > 0, and f(x) = 0

2007-10-14 06:50:19 · 2 answers · asked by Anonymous in Mathematics

2007-10-14 06:48:41 · 4 answers · asked by Tiko 3 in Botany

I don't understand how an object can move if the object is pushing me back with equal force when I push it. Please explain.

2007-10-14 06:47:50 · 5 answers · asked by dawance88 2 in Physics

1, 2, 3, 4, ,5 ,6 ,9 , 10 , 18, 20, 30 , 36 , 45 , 60 , 90

2007-10-14 06:46:18 · 0 answers · asked by Erin<3 1 in Mathematics

2007-10-14 06:43:27 · 3 answers · asked by crystal_clear_girl238 1 in Mathematics

the legths of 2 sides of a triangle are 12 and 2 , respectivly, what is one posible legth of the 3rd side??

2007-10-14 06:43:15 · 9 answers · asked by Anonymous in Mathematics

A ball would go straight through, but a wave will come out circular (depends on how wide the opening is). Why does this happen?

2007-10-14 06:40:30 · 2 answers · asked by Just Me 2 in Physics

This is just a puzzle, I know the answer but just for general amusement or annoyance.

When you take any three digit number, not a reverse of itself (e.g 787).
Reverse it and subtract the smaller of the two from the larger.
(if left with a two digit number a zero must be placed in front of it, e.g 098)
Take the answer to this and its reverse and add them together.

Show why, in anyway you choose, why the answer will always be 1089.

E.G
765
-567
- - -
198
+891
- - -
1089

(A university lecturer did this trick on me and I was annoyed for the next few days trying to work out why.)

2007-10-14 06:37:41 · 1 answers · asked by Enericoy 1 in Mathematics