Science & Mathematics - 15 November 2007

all of the following numerators have the denominator 4,600,000,000:

3,500,000,000

544,000,000

254,000,000

505,000,000

408,000,000

360,000,000

286,000,000

245,000,000

320,000,000

208,000,000

144,000,000

100,000

13



all of the answers need to have the denominator of 100

2007-11-15 12:29:33 · 3 answers · asked by Anonymous in Mathematics

I WILL BE ONE, and you all WILL tell what are,and the requirements. NOW!

2007-11-15 12:28:15 · 2 answers · asked by Izzy 2 in Engineering

2007-11-15 12:26:50 · 3 answers · asked by ? 2 in Biology

I'm stuck on the last 3 questions.... please help me thanks..do any question u know


1. Two 100 kg lead spheres are suspended from 100m long massless cables. The tops of the cables have been carefully anchored exactly 1m apart. What is the distance between the centers of the spheres.

2. A 1.0kg object is released from rest 500km ( approx. 300 miles) above the earth.
a.What is its impact speed as it hits the ground? Ignore air resistance.
b. What would the impact speed be if the earth were flat?
c. By what % is the flat-earth calculation in error.
d. Suppose a space shuttle astronaut, while out for a stroll, "drops" a 1.0kg hammer. Will it fall to earth? Explain why or why not.

3. 2 identical planets of mass M and radius R spaced 6R apart. Ignore the rotation of the planets about each other .What is the escape speed of a rocketlaunched from (a) point A(first planet) and (b) point B(the middle point between first planet and second?

2007-11-15 12:25:27 · 2 answers · asked by tmackun135 1 in Physics

i cant find this information anywhere. i googled it and have been looking for hours. websites will help but no wikipedia please.

2007-11-15 12:21:52 · 1 answers · asked by Billie V 3 in Geography

2007-11-15 12:21:09 · 3 answers · asked by 123456789 1 in Biology

f ''(x) = 8x + 6 sin(x)

f'(0)= 4
f(0)= 3

What is f(5)?

( I am having trouble with the sin5/cos5 part)

2007-11-15 12:20:50 · 2 answers · asked by Rachel 1 in Mathematics

i have no problem to use as an example

2007-11-15 12:16:54 · 4 answers · asked by ALESANA 7 in Mathematics

(eg. nurse, doctor, pharmacist, dentist....)
And how have they earned your trust?

2007-11-15 12:15:58 · 2 answers · asked by Anonymous in Medicine

2007-11-15 12:14:00 · 16 answers · asked by Keegan Yi Hang S 2 in Astronomy & Space

Need a random number please ^.^

2007-11-15 12:13:20 · 3 answers · asked by Anonymous in Mathematics

Sylvia has $11.25 in nickels, dimes, and quarters. She has 3 times as many nickels as dimes and 5 more quarters than dimes. How many of each kind of coin does she have?

The Answers are 20 Dimes, 60 nickels , 25 Quarters

the problem comes with the answers.

But can some1 explain to me very well how to step by step get the answer
i tried for 20 mins on 1 problem still don't get it!
THX

2007-11-15 12:11:30 · 8 answers · asked by KoF 2 in Mathematics

2007-11-15 12:11:11 · 3 answers · asked by b4f2f 2 in Engineering

2007-11-15 12:09:59 · 3 answers · asked by Anonymous in Geography

2007-11-15 12:06:19 · 11 answers · asked by Anonymous in Astronomy & Space

My house is over 100 years old, and we are remodeling. My husband tore up the floor and dug a hole to place a pipe under, and he dug up a hand carved barrel tap. We dont know anything about it, like how old it is or who made it, or if it is worth anything. Does anyone out there know of someone we could contact to find out?

2007-11-15 12:05:50 · 5 answers · asked by kimmcm30 1 in Earth Sciences & Geology

Anyone experience a normal fetus with short femur.

2007-11-15 12:04:06 · 4 answers · asked by nicol r 1 in Medicine

2007-11-15 12:03:28 · 5 answers · asked by ? 2 in Biology

they are equal to eachother i just have no idea how to even start this. i know all the trig identities but im just baffled

2007-11-15 12:03:10 · 2 answers · asked by Alina Z 2 in Mathematics

1. Find the scalar equation of the line that passes through the point P(0) and has a normal vector n.

P(0)(4,-2), n = (2,7)

2. Find the Cartesian equation of:

(x,y) = (4, -6) + t (8,2)

3. Find the scalr equation of the line that passes through (2,-6) and is parallel to 2x - 3y +8 = 0.

4. Find vector and parametric equations of the line:

5x - 3y + 15 = 0

2007-11-15 12:01:38 · 2 answers · asked by Anonymous in Mathematics

A hiker tosses a rock into a canyon. He hears it strike water 4.78 s later. How far down is the surface of the water?

The speed of sound is Vs=343m/s.
I'm not sure how to start it..

2007-11-15 12:01:15 · 7 answers · asked by NEpatriots12 2 in Earth Sciences & Geology

PHYSICS HELPERS I need your help on 3 word problems help?
PHYSICS HELPERS I need your help on 3 word problems help?
QUESTION !
Two towns, A and B, are 200 miles apart. Car 1 starts from town A and at the same time, car 2 starts from town B. They move towaRD each other with constant speeds: Car 1 at 50 mph, car 2 at 40mph.

A. How far apart are the two cars if car 2 has travel a time triangle t (change of t)

B. Where do the cars meet? If you use an equation intrpret the expression on each side and tell why you set them equal.


QUESTION 2

Two objects start at 30km apart at the same time and move toward each other with uniform motion. Object A has a speed of 6.3 km/h and object B has a speed of 4.5 km/h. When will they meet.


QUESTION 3
on a straight inclined track, a ball rolling uphill takes 1.3 seconds to slow down from a velocity of 135cm/s to a velocity of 65 cm/s. On the same track how much time would it take a rolling ball with velocity 85 cm/s to reach a velocity of 0? Explain your reasoning. Do not use algebra

2007-11-15 11:54:56 · 2 answers · asked by ? 1 in Physics

2007-11-15 11:54:29 · 3 answers · asked by Anonymous in Medicine

How many distinct even five digit numbers greater than 60,000 exist if each of the digits 3,4,5,6 and 9 must be used exactly once in each even number?

2007-11-15 11:51:58 · 4 answers · asked by Quagmire77 1 in Mathematics

please show work if possible

1. the numbers, 999, 777, and 111 contain a total of nine digits. cross out one or more of the digits and the sum of the numbers left need to equal eighteen. how would the answer to this puzzle change if the directions change to: cross out one or more of the digits and the sum of the digits left need to equal eighteen?

2. how many three-digit positive integers have three different even digits?

2007-11-15 11:50:57 · 2 answers · asked by Osamu Miyawaki 1 in Mathematics

2007-11-15 11:50:38 · 4 answers · asked by Anonymous in Chemistry

Gould's view is that "it just plain happens." What counter assertions can be made based on his essay Nonmoral Nature?

2007-11-15 11:50:23 · 3 answers · asked by Anonymous in Biology

i need help with this question badly it's for a science question.

2007-11-15 11:49:48 · 3 answers · asked by Anonymous in Biology

This is the problem:

http://img113.imageshack.us/img113/8365/665ae6.png

After doing everything, my result was:

x^2 - x - 6
And factored:
(x - 3)(x + 2)
x = 3, x = - 2

It says my answer is wrong, however. What was my mistake?

2007-11-15 11:46:49 · 1 answers · asked by Sebastian 2 in Mathematics

What does the air temperature tell us when trying to find the relative humidity?

I kwow that the wet bulb temperature gives us the temperature when water condenses, I just don't know what the air temperature tells us.

2007-11-15 11:45:43 · 2 answers · asked by Anonymous in Other - Science