Science & Mathematics - 2 December 2007

2007-12-02 05:08:13 · 18 answers · asked by mo 1 in Mathematics

i got 3/2 as answer but apparently its not correct. Thanks!

2007-12-02 05:03:34 · 3 answers · asked by Jackie S 1 in Mathematics

Why cant i see anything throught it? And also are you able to see things close up or only far away?

2007-12-02 05:03:21 · 2 answers · asked by Anonymous in Astronomy & Space

Determine if each equation given is a function. If it is or is not a function, explain the reason why. How do I know if an equation is a function or not?

(1) y = + or - sqrt{1 - 2x}

(2) y = (3x - 1)/(x + 2)

2007-12-02 05:03:00 · 3 answers · asked by journey 1 in Mathematics

This is for a college class assignment that is due on Tuesday (12/4). What I have worked out so far is this:
Volume = 4/3 pi r^3; If the moon's diameter is n, then it's r = 1/2 n. Since the earth is 4 x this, then the earth's r = 2n.......right?

I'm getting for the moon: V= 4/3 pi (1/2n)^3
For the earth: V= 4/3 pi (2n)^3

How do you figure ratio.....if I've even done this much right?

2007-12-02 05:02:23 · 6 answers · asked by atalco3 2 in Mathematics

how do i find the equation of
a) a line
b)a prabola
c) a circle
from a graph
answer in standard form!
(no specific question just how to ...i kinda forgot...with examples if posible THANK YOU)

2007-12-02 05:01:56 · 1 answers · asked by ? 3 in Mathematics

On some ocasions i have looked at the moon and have been convinced it looks larger and i can see more detail. Is this a consequence of the lensing effect of ou atmosphere, or sometimes is it flying closer to make it appear so?

2007-12-02 05:01:43 · 14 answers · asked by Anonymous in Astronomy & Space

A person 6 feet tall walks away form a streetlight at the rate of 5ft/s. If the light is 18 feet above ground level, how fast is the person's shadow lengthening?

2007-12-02 05:00:43 · 1 answers · asked by MaKeShIfT 2 in Mathematics

Determine if each equation given is a function. If it is or is not a function, explain the reason why. How do I know if an equation is a function or not?

(1) y = |x| + 4

(2) y = (1/x)

2007-12-02 05:00:42 · 1 answers · asked by journey 1 in Mathematics

Can You Help Me With My Maths Homework Please

1) An Antique Clock Cost £540. Its Increased By 18% What Is The Total Now ?


2)£600 is put in the bank. after a year the money has increased by 8%. How Much is in the bank?

3) second hand car cost £2400. The price falls by 45% when it is sold again. how much is it sold for now ?


I Hope You can help me thanks

2007-12-02 04:59:51 · 3 answers · asked by twocoats 1 in Mathematics

A uniform, solid disk with mass m and radius R is pivoted about a horizontal axis through its center. A small object of the same mass is glued to the rim of the disk.

If the disk is released from rest with the small object at the end of a horizontal radius, find the angular speed when the small object is directly below the axis.

Express your answer in terms of the variables m, R and appropriate constants.

2007-12-02 04:59:19 · 3 answers · asked by Anonymous in Physics

A friend told me that... Is it true?

2007-12-02 04:58:52 · 7 answers · asked by Lyla 3 in Astronomy & Space

A ferris wheel with a radius of 20 m rotates once every 120s. At time t = 0 passengers get on at the lowest point of its rotation which is 2m above the ground. Determine a sine or cosine function that gives the passenger's height (h) meters, above the ground as a function of time (t) in seconds

2007-12-02 04:58:45 · 1 answers · asked by Anonymous in Mathematics

i should know this, but i forgot what it is:

what is the antiderivative of e^-x dx?

2007-12-02 04:55:21 · 6 answers · asked by cornz000 1 in Mathematics

A rocket ship is initially in a circular orbit close to earth. It is desired to place the rocket ship in an orbit where the apogee distance is 60x that of the original. A single rocket ship burst is used to accomplish this, only in the tangential direction. What is the final to initial speed ratio. Also, if the speed thrust was 1% too great, what is the new apogee distance?

2007-12-02 04:55:19 · 1 answers · asked by Bommer 2 in Astronomy & Space

a. clear and rainy days
b. deserts near 30 degrees N and 30 degrees S
c. rain shadows
d. the monsoon of southern Asian and the southwestern United States

2007-12-02 04:54:34 · 1 answers · asked by T 1 in Weather

a stone is dropped from rest into a well. the sound of the splash is heard exactly 2.00 s later. Find the depth of the well if the air temperature is 10.0 degrees Celsius.

2007-12-02 04:53:38 · 3 answers · asked by Mika 2 in Physics

2007-12-02 04:52:25 · 7 answers · asked by Asker 6 in Zoology

2007-12-02 04:47:43 · 3 answers · asked by wag1 2 in Geography

what is the fewest number of coins you would need to pay a charge of any amount less than 26 cents with exact change?

List the coins.. {such as nickels, dimes, pennies, etc...}

2007-12-02 04:44:30 · 5 answers · asked by Manoura 2 in Mathematics

2007-12-02 04:43:03 · 2 answers · asked by Moe_932 2 in Earth Sciences & Geology

Use either the comparison test or ratio test to determine which of the following series converge or diverge

k=1∑∞ (3k^2)-3 / (k^5)+1

k=1∑∞ (k^3/4^k)

k=1∑∞ (1/log(k+1))

k=1∑∞ (1/k + log(k))

2007-12-02 04:40:47 · 3 answers · asked by Anonymous in Mathematics

i want to know , while calculating problems , i get into equations like when x=2, x=3 ....i got to solve cos(x) or sin(x).
so how do i solve that ?

2007-12-02 04:40:36 · 6 answers · asked by sri_july27 2 in Mathematics

if y = 24x + 3x^2 - x^3, what is the relative maximum value of y?

so far I've got:
1) derivative
2) derivative = 0, solve
3) quadratic formula
4) bang head on desk because it still didn't work.

please help =.O

2007-12-02 04:38:16 · 4 answers · asked by Fundamenta- list Militant Atheist 5 in Mathematics

2007-12-02 04:36:57 · 5 answers · asked by Anonymous in Mathematics

A. The forces on it are balanced
B. There is a constant resultant force acting
C. The resultant force acting on it decrease with time
D. The resultant on it increase with time

Explanation please...

2007-12-02 04:34:19 · 3 answers · asked by Flamezz 5 in Physics

Im talking about a cell

2007-12-02 04:32:16 · 4 answers · asked by cutiepie03121994 2 in Biology

2007-12-02 04:32:15 · 2 answers · asked by davidtn_108 1 in Astronomy & Space

please tell me how u did this

2007-12-02 04:29:03 · 5 answers · asked by Anonymous in Mathematics

1) Are they all bad or like other spirits can they go either way? 2) Were/Are they human?
3) I run local paper routes and on my third route there is a spirit that not only I have seen, but also my husband & daughter. The spirit seems to enjoy running thru the backyards of one side of the street, which I know it has to be a spirit, because no human can run thru solid wood fences, nor jump them as fast as this guy(it has a male shape) can. Than yesterday, I saw him jogging in the main road as I walked along the side as if he was keeping up with me. It's head was shaped in such a way that I know it was watching me, but it was somewhat transparent so I know it wasn't an actual person. I have seen it in the shadows though watching and waiting for me to get to a certain point as if it's timing me. Do I try to communicate with it, or is it trying to let me know something? Its always watching me, but now it gets closer and is that a good thing or bad? I don't get any bad vibes.

2007-12-02 04:26:55 · 10 answers · asked by Anonymous in Paranormal Phenomena