Science & Mathematics - 4 September 2007

The equation h= -t to the second power plus 112t to the second power gives the height of an arrow, shot upward from the ground with an initial velocity of 112ft/s, where t is the time after the arrow leaves the ground. Find the time it takes for the arrow to rach a height of 180ft.

2007-09-04 06:58:05 · 4 answers · asked by Lindsey F 1 in Mathematics

Is red blood called hemoglobin.

It’s purpose is to do what?

2007-09-04 06:57:48 · 7 answers · asked by Anonymous in Medicine

2007-09-04 06:56:26 · 5 answers · asked by andromeda 2 in Earth Sciences & Geology

The length of a rctangle is 1 cm longer than its width. If the diagonal of the rectangle is 4cm, what are the dimensions (the length and the width) of the rectangle

2007-09-04 06:55:12 · 12 answers · asked by Lindsey F 1 in Mathematics

Is there any advantage to using FORTRAN over C++?

I'm asking because I am getting a degree in Applied Mathematics and pretty much all of the computer scientists I know are fans of C++ but I've noticed that a lot of engineers tend to use FORTRAN so I'm wondering which would be the most beneficial for me to invest the time to learn more about.

2007-09-04 06:50:36 · 11 answers · asked by Anonymous in Engineering

An object of mass 0.8kg moves due south on a horizontal frictionless plate plane with a speed of 0.5ms^-1. A horizontal force of magnitude 0.0060N directed due east acts on the object for 10s and is then removed. At the instant the force is removed what are the following?

The Velocity of the object?
The Displacement of the object relative to its position at the instant the force was applied (i.e. a distance and direction relative to where the object was at t = 0s)?
The work done on the object by the force?

2007-09-04 06:49:49 · 5 answers · asked by Alexander M 1 in Physics

2007-09-04 06:48:14 · 4 answers · asked by bealsey1 2 in Mathematics

This math problem says "-18x3."

2007-09-04 06:46:32 · 5 answers · asked by D YellowMadness 1 in Mathematics

2007-09-04 06:46:15 · 3 answers · asked by bealsey1 2 in Mathematics

2007-09-04 06:45:55 · 2 answers · asked by Fred 7 in Mathematics

2007-09-04 06:45:20 · 4 answers · asked by bealsey1 2 in Mathematics

2007-09-04 06:43:37 · 3 answers · asked by bealsey1 2 in Mathematics

solve each equation or formula for the variable specified.

EXAMPLE: 3x - 4y = 7, for y
ANSWER :3x - 7/4


1. 3x - 4y = 7, for x

2. a(y + 1) = b, for y

3. ex - 2y = 3z, for x

4. 3/5y + a = b, for y

5. y = mx + b, for m

2007-09-04 06:38:54 · 8 answers · asked by cali hollister chick 1 in Mathematics

Let a_n be a non identically zero arithmetic progression. Then, is it true that Sum (1/a_n) diverges?

2007-09-04 06:37:58 · 2 answers · asked by Sonia 1 in Mathematics

I already got the first 2 questions:
(a) How much later does it reach the bottom of the cliff?
i got 5.053 s
(b) What is its speed just before hitting?
38.1094

I just don't know how ro find the tital distance. Is it find the dinstance and then add 67.0 m ? I don't understand so plaese help me out i would really appreciate it Thanks :) xoxo

2007-09-04 06:36:00 · 6 answers · asked by Nikita 1 in Physics

If 2H=a^2 x then x = ?
--------
6b

reads: If 2h equals "a" to the second power x over 6b, then x equals

2007-09-04 06:35:42 · 3 answers · asked by rocker chick 2 in Mathematics

PLEASE GIVE THE DETAILS TO CALCULATE LUX AND LMENS. HOW MUCH LIGHT WILL GET IN MY ROOM 2x36W FLUROCENT TUBE LIGHT

2007-09-04 06:34:06 · 2 answers · asked by shijukottayil 1 in Engineering

I have 2 number.

A and B

A ~ B = 38

A ~ C = 59

N.B: ~ means difference.

what is B ~ C ?

How to calculate ?

How do i convince my result is correct ?

2007-09-04 06:32:09 · 4 answers · asked by calculus 1 in Mathematics

Of which there are 10 for every human cell.

2007-09-04 06:31:12 · 10 answers · asked by Anonymous in Biology

Determine the number of square feet in one square yard Then determine the number of cubic feet in a cubic yard.

Can anyone help me. I know that this is easy stuff, but I just can't think straight right now! PLEASE HELP!

2007-09-04 06:19:53 · 7 answers · asked by Anonymous in Mathematics

Obviously there had to be something to explode and create the rock and elements in our universe. I think there was one gian mass that blew up like a nuclear bomb. Where did that mass come from? Was it floating in the nothingness of the universe and where did the energy that caused the explosion come from?

Thinking about such things is a good argument for God. Maybe everything didn't happen on earth the way that it is stated in the bible, but something had to be behind the creation of the universe. And if there is a God then where did he come from?

2007-09-04 06:18:52 · 15 answers · asked by Anonymous in Astronomy & Space

Put in location and Heat Index with Temp if known.........

Mine is Diamondhead, MS. and it got to 100.1F with Heat Index of 137.0..............

..

2007-09-04 06:16:06 · 2 answers · asked by muddypuppyuk 5 in Weather

x^2 + 3x - 5/x^3 + 2x + h

In the problem I'm supposed to divide every term by x^3, but I don't know why. Can anyone help?

2007-09-04 06:15:10 · 5 answers · asked by super_nmaster2000 1 in Mathematics

1/2Y-11=1/6Y

2007-09-04 06:13:29 · 9 answers · asked by Anonymous in Mathematics

2007-09-04 06:05:06 · 7 answers · asked by •Me• 3 in Mathematics

2007-09-04 06:02:24 · 8 answers · asked by ChaliQ 4 in Astronomy & Space

is the answer


8x^3y^9

or


8xy^9

2007-09-04 06:00:54 · 5 answers · asked by rocker chick 2 in Mathematics

If there were ten million barrels in March 1999 and forty million barrels in December 1999, is the increase 40%?
Please help me, I'm really bad with percentages.

2007-09-04 05:59:38 · 3 answers · asked by Madera 2 in Mathematics

express the set of numbers x satisfying the given condition as an interval.

abs.(3x+5)<1

I put (-2,-4/3)

Is it correct? If so, how can I show work for it?

2007-09-04 05:58:45 · 3 answers · asked by Harmlessly Roaming 1 in Mathematics

2007-09-04 05:54:16 · 6 answers · asked by baby166_99 2 in Mathematics