Science & Mathematics - 27 September 2007

For our algebra unit in math, our teacher wants us to do the following....
Create a math equation based on REAL LIFE. it cant be made up, even if what you make up is something that can be real. you must go online or wherever and find it and turn it into an equation...it has to be real...my teachers examples are all mostly about sports, and for example, batting averages. i get how she gets the batting averages or average scores or whatever, but how do u turn it into an equation.....know what i mean? its kinda hard to explain but i rly hope sumone can help.

2007-09-27 12:50:22 · 5 answers · asked by Anonymous in Mathematics

2007-09-27 12:47:10 · 1 answers · asked by deannahndrsn 2 in Mathematics

ok so i kno that standard form is ax + by = c

how woul di find the standard form of the equation of the line that passes through the oints (-5, 4) and (-8, -6)

2007-09-27 12:43:18 · 1 answers · asked by toriw94 1 in Mathematics

2007-09-27 12:39:05 · 13 answers · asked by Anonymous in Astronomy & Space

If you are in a car that is struck from behind, you can receive a serious neck injury called whiplash.

Using Newton's laws of motion, explain what happens.
How does a headrest reduce whiplash?

2007-09-27 12:37:29 · 3 answers · asked by Anonymous in Physics

A cannon, located 60.0 m from the base of a vertical 25.0 m tal cliff, shoots a 15 kg shell at 43.0 degrees above the horizontal toward the cliff.

a) What must the minimum muzzle velocity be for the shell to clear the top of the cliff?

b) The ground at the top of the cliff is level, with a constant elevation of 25.0 m above the cannon. Under the conditions of part (a), how far does the shell land past the edge of the cliff?

2007-09-27 12:36:55 · 1 answers · asked by Anonymous in Physics

a hockey player hits a puck with his stick giving the puck an initial speed of 5 m/s. if the puck slows uninformly and comes to rest in a distance of 20 m what is the coefficient of kinetic friction between ice and the puck??????

2007-09-27 12:35:41 · 1 answers · asked by hahahaha 2 in Physics

A two-digit number is 7 times the sum of its digits. If the digits are reversed, then the new two-digit number is n times the sum of its digits, Find n.

Most thorough explanation gets the 10 =)

2007-09-27 12:33:49 · 3 answers · asked by Sunrayye 5 in Mathematics

Famer attaches 25kg bale of hay to one end of rope passing over a frictionless pulley connected to beam in hay barn. Another farmer pulls down on opposite end of rope with force of 277 N. Ignoring mass of rope, what will be the magnitude and direction of the bale's acceleration if the gravatational force acting on it is 245 N?

2007-09-27 12:31:07 · 4 answers · asked by Phil 2 in Physics

2007-09-27 12:30:17 · 29 answers · asked by El Diablo King Of Kings 3 in Parapsychology

2007-09-27 12:29:55 · 2 answers · asked by Anonymous in Earth Sciences & Geology

i just got 68/70 on a test and I have been tryin to figure out what percentage that is!

2007-09-27 12:23:56 · 7 answers · asked by gyρsyvαnner 3 in Mathematics

Dan invests $3000 more in an account that pays 4% simple interest than he invests in an account that pays 3% simple interest. If the total interest earned for the first year is $610, how much did Dan invest in each account?

a. Let x represent the principal invested in the account paying 3% interest.
Let y represent what?
b. Write the two equations in terms of x and y.
c. Solve the system of equations and state the amount invested at 3% and at 4%.

2007-09-27 12:22:56 · 2 answers · asked by DoWHATiDO 3 in Mathematics

1. 16x^2 -y^2+96x+8y+112=0
2. y^2-4x^2-2y-16x+1=0

2007-09-27 12:21:28 · 1 answers · asked by Zoology 1 in Mathematics

2/3x + 3/4y = 9
y=??????

2007-09-27 12:21:18 · 1 answers · asked by Anonymous in Mathematics

the coins represent a quarter, a dime, and a nickel. A quarter weighs 6 grams, a dime weighs 2 grams, and a nickel weighs 5 grams.What combination of coins would weigh 30 grams and have a combined value of 1 dollar? the answer: 2 nickels, 2 quarters and 4 dimes now here's the question if a penny weighs 1/5 of a gram, which coin could be replaced with the penny? explain work.

2007-09-27 12:19:52 · 7 answers · asked by Anonymous in Mathematics

2007-09-27 12:19:48 · 2 answers · asked by King _Kong 1 in Mathematics

by frost I mean crystalization on the outside.

2007-09-27 12:19:04 · 2 answers · asked by Anonymous in Earth Sciences & Geology

I have a row of plastic pinwheels in my garden, six are 6 to 8 inches big and three are 10 to 12 inches big. When the wind blows and all the pinwheels are spinning, why do the small pinwheels spin counterclockwise and the big pinwheels spin clockwise? Does it have anything to do with the size of the pinwheels?

2007-09-27 12:19:01 · 2 answers · asked by smibgal 1 in Physics

I am very interested in trying to build my own small wind generator, I seen that you basically need a alternator, blades to build the fan, cabling and a battery. So could you use a car alternator and also how many 12V batterys would you need?

2007-09-27 12:18:56 · 6 answers · asked by lindasuegray 1 in Engineering

ok so you get 22 chromosones from your dad and 22 chromosones from your mom
and your xxy chromosne

now you have your OWN DNA.

ok i get this but if you have 50% from your mom and 50% from your dad how can you look more like your dad then your mom?


Also i look chineese and have chinese type hair and a chineese nose[wide] my chineese ancestor was my great great grandpa, but if you get so little from your grandparents alone then how come i got so much genes from my great great grandparent.

my dad looks nothing chineese and my his mom looks a little chineese.

Im 3rd generation german, 3rd generation chineese, 3rd generation french and 2nd spain.

i have brown/black hair im 4ft 11 and im 13
im light brown{was pale white when i was born}

i just want to know why i got so much genes from my dad side?? enough that people actually think im somewere from asia its either they think im white, asian or spanish is the first things they ask me and its annoying.

2007-09-27 12:18:49 · 4 answers · asked by Anonymous in Biology

I have to make a project and my teacher ask us for h.w to find the size of model meaning model=planet. I searched on google and it only keep telling me the mass. Is the mass and the size the same?
Mars — Mass: 6.4185×1023 KG (0.107 Earths)
^^ is what they gave me. according to wikipedia. Please HELP!

2007-09-27 12:18:33 · 5 answers · asked by Ingrid P 1 in Astronomy & Space

how do i solve this please give step by step directions:

2(6-4d)=25-9d

2007-09-27 12:17:40 · 6 answers · asked by Anonymous in Mathematics

2007-09-27 12:16:14 · 4 answers · asked by la$t drinx$ 3 in Physics

The other day I saw pictures of mars with holes in the surface, and yesterdi saw Rise of the silver surfer and he makes holes in the earth just like in the mars pictures and then he destroys the earth allthough et the lasts moment decides not to but televiosion is not like real life really, is it???ö:..

2007-09-27 12:12:42 · 8 answers · asked by Anonymous in Astronomy & Space

2007-09-27 12:10:18 · 10 answers · asked by thngshvchngedforme 2 in Astronomy & Space

2007-09-27 12:09:22 · 2 answers · asked by missy 1 in Mathematics

2007-09-27 12:04:04 · 8 answers · asked by lee e 1 in Weather

can you make a chrat or something for the metric system please o r anything that relates to the metric system please help

P.S thanks for all who hleped me :)

2007-09-27 12:03:50 · 4 answers · asked by vicky 2 in Mathematics

airplane flies parallel to the ground, undergoes 2 consecutive displacements.
the first is 39 km at 34.9 degrees west of north
the 2nd is 128 km at 61.1 degrees east of north

at what angle east of north is the plane's total displacement? answer in units of degrees

2007-09-27 12:03:04 · 2 answers · asked by lalalallalallalalal l 1 in Physics