Science & Mathematics - 10 September 2007

thanks

2007-09-10 17:12:09 · 2 answers · asked by Anonymous in Chemistry

I remeber playing this game and it worked. We lifted a girl over our heads with our finger tips. Anyone know how this is possiable?

2007-09-10 17:11:44 · 15 answers · asked by GabbyGal 4 in Paranormal Phenomena

David Murray sells cars. He makes a base salary of $1000 per month plus a commission of 1% of the selling price of each car. For six months Mr. Murray has tabulated the number of cars he has sold for each month and the amount of money he made. If Mr. Murray sells only five cars in month seven how much money will he make?

Number of Cars Sold /// Money Made
18 ///3544
22 ///4108
10 ///2413
11 ///2554
14 ///2978
17 ///3401

2007-09-10 17:09:38 · 8 answers · asked by Anonymous in Mathematics

surds..

and what does it mean when there is 2√3

(wen there is a 2 square root 3?)

how do you get that? (above)

pls do you know any basics and tips about surds?

thank you

best answer for answer which helps in most detail

thanks

2007-09-10 17:09:34 · 8 answers · asked by Anonymous in Mathematics

2007-09-10 17:08:11 · 4 answers · asked by jewel7962002 1 in Mathematics

In a rectangular piece of cardboard with perimeter 20 ft. Three parallel and equally spaced creases are made. The cardboard is then folded to make a rectangular box with open-square ends.
a. Show that the volume of the box is V(x) = x^2(10-4x)
b. What is the domain of V?
c. Find the approximate value of x that maximizes the volume. Then give the approximate maximum volume.

2007-09-10 17:06:16 · 3 answers · asked by Anonymous in Mathematics

in a reaction between magnesium and oxygen, the only product is 80.0 grams of magnesium oxide. how many grams of magnesium were burned?

2007-09-10 17:06:04 · 5 answers · asked by hii 1 in Chemistry

ethane gas (C2H6) burns in air to form carbon dioxide and water. how many grams of carbon dioxide are produced for each 8.00 grams of water produced?

2007-09-10 17:04:27 · 1 answers · asked by hii 1 in Chemistry

i know that its impossible for us to see black holes right now because light, at its high speed, cant escape them.

but! if you do some research you can see that scientists have been able to speed up a beam of light several times faster than 186,000 miles a second. couldnt we use this to view a black hole? shine a beam of accelerated light towards a black hole and hope its strong enough to escape its gravity and give us a clear view of the black hole.

2007-09-10 17:03:06 · 8 answers · asked by Anonymous in Astronomy & Space

How do you find volume of water? i mean what is the formula for finding volumes of liquids?

2007-09-10 17:01:54 · 6 answers · asked by James 2 in Mathematics

2007-09-10 17:01:13 · 4 answers · asked by JAMES 4 in Engineering

self explainitory

2007-09-10 16:58:39 · 17 answers · asked by Anonymous in Geography

one of the way that biologists estimate the number of individuals of a species in an area is as follows. first, 100 animals of the species are caught and marked. a period of time is permitted to elapse, and then b animals are caught. if c of these(c is less than or equal to b) are marked, find the number of individuals in the area.

2007-09-10 16:58:18 · 1 answers · asked by cherry_bananas_cookies 4 in Mathematics

solve for the letter
2by-2a=ay-4b :y
2x-a/b= 2x-b/a :x
x-a/ x-b= x-c/x-d : x
1/ay+1/by = 1/c :y

2007-09-10 16:53:13 · 1 answers · asked by MARIA C 1 in Mathematics

plz i know this is easy , i just cant get it!

2007-09-10 16:53:09 · 1 answers · asked by Anonymous in Mathematics

2007-09-10 16:52:33 · 5 answers · asked by Katie 4 in Mathematics

a teacher of mine asked this question and cannot find the answer anywhere library internet etc... from hints i know it is 10 letters long and starts with an "A" Please help me!!!

2007-09-10 16:51:52 · 3 answers · asked by Anonymous in Geography

Simplify:

2z^3 + 6z^2 + 18z (divided by) z^3 - 27

Will give best answer!!

2007-09-10 16:50:21 · 3 answers · asked by charmedrules10 2 in Mathematics

Don is camping out by a clear mountain stream and decides to make some rice. The cooking directions asks for 1 quart of water, but Don had only a 7 quart jug and a 11 quart jug. Don hates dry rice and he hates sticky rice how can he measure to exactly 1 quart? By the way he can get as much water as he like and waste it

2007-09-10 16:50:17 · 5 answers · asked by Anonymous in Mathematics

Velocity is speed and direction.
Speed is just... speed.

My dilemma is this: If you drop two objects and there is no air resistance, they WILL fall at the same speed. However, is it or is it not relevant that they will also fall in the same direction (i.e. velocity)?

Any help with this Physics questions is greatly appreciated. Thanks in advance!

2007-09-10 16:50:03 · 10 answers · asked by Anonymous in Physics

2007-09-10 16:48:10 · 8 answers · asked by chester 2 in Mathematics

2007-09-10 16:43:48 · 9 answers · asked by texan3715 1 in Mathematics

2x+3y=1
4x-y=29

2007-09-10 16:42:55 · 2 answers · asked by Anonymous in Mathematics

it says to find all 6 trigonometric functions for this...

pheta= tan^-1(-5/12)


please help!! thank you

2007-09-10 16:41:52 · 3 answers · asked by Katie 4 in Mathematics

Find the magnitude and direction(s) of the following vector.

C=-2i -3j +4k (2 angles are needed)

Details Please

2007-09-10 16:40:40 · 2 answers · asked by Anonymous in Mathematics

solve by using elimination plzz

2007-09-10 16:38:29 · 5 answers · asked by lover 1 in Mathematics

2007-09-10 16:37:46 · 2 answers · asked by Jen 4 in Mathematics

A cone is inscribed in a sphere of radius 6.
a. Express the function of x. ( Hint V = 1/3 pi times r^2 times h)
Then give the domain of this function.
b. Find the approximate value of x that maximizes the volume. Then give the approximate maximum volume.

2007-09-10 16:37:36 · 3 answers · asked by Anonymous in Mathematics

...deg. above the horizontal. the building is 13.9m in height. accelertation of gravity 9.8m/s2. at what horizontal distance, from the base of the building will the rock strike the ground in meters?

2007-09-10 16:34:49 · 2 answers · asked by ? 1 in Physics

2007-09-10 16:34:33 · 1 answers · asked by deepu 1 in Mathematics