Science & Mathematics - 18 September 2007

2007-09-18 12:25:03 · 8 answers · asked by Anonymous in Other - Science

2007-09-18 12:24:44 · 5 answers · asked by superpoof12002 1 in Zoology

solve the following inequality. write the answer in interval notation.

2007-09-18 12:24:20 · 3 answers · asked by star baller 360 5 in Mathematics

A race car can be slowed with a constant acceleration of -11 m/s

A) If the car is going 55 m/s how many meters will it take to stop?

B) How many meters will it take to stop a car going twice as fast?


I don't understand how you can do this problem when they only give you one piece of information.

I'm not trying to get someone to do my homework for me, I just really don't know where to begin, I've never been good in applying math to science.

2007-09-18 12:24:19 · 1 answers · asked by Katie E 2 in Physics

density=mass/volume

d=612/245=2.497959.....

d=68/6.48=10.493827.......

2007-09-18 12:22:28 · 2 answers · asked by ALESANA 7 in Chemistry

2007-09-18 12:21:05 · 2 answers · asked by Sarah M 1 in Botany

I have a digital thermometer that takes four AAAs or an adaptor that plugs into the wall. The thermometer will run for about 6-8 months on the batteries. Is it costing me more to keep it plugged in or should I unplug it and replace batteries every 6-8 months? Hmmmmm

2007-09-18 12:19:33 · 2 answers · asked by Brian C.K. 5 in Other - Science

2007-09-18 12:19:04 · 20 answers · asked by kikijazz 1 in Astronomy & Space

1.-Water gains and loses energy ________________.
quickly
slowly
violently
instantly
rapidly

2.- Water in its solid state compared to liquid water is:
Denser
Less dense
As dense
Can’t be determined
Warmer

3.-Water cannot be found as a pure substance on earth because:
it is made up of two atoms of hydrogen and one of oxygen.
it can be solid, liquid or gas.
it has salts, gases and other substances dissolved in it.
it is a non-polar molecule.
it is found as saltwater.

4.- Chemical bond responsible for water's high surface tension, low vapor pressure, high specific heat capacity, high heat of vaporization, and high boiling point
Covalent bond
Ionic bond
Hydrogen bond.
Disulfide bond.
None of the above

5.- A water molecule has several important properties due to its:
non-polarity
temperature
pressure
electrons
polarity

2007-09-18 12:18:35 · 4 answers · asked by dasg d 1 in Biology

Why is it that I have never heard this Theory?

The Dominant life form on earth prior to the big astroid taht killed the earth was giant lizards.. ie. Dinosaurs..

Well.. Prior to taht there was no humans on earth riht..

well..


doesnt it go to common sense that the astroid obviously carried something that made way for the beginnings of the human race..
If there was the raw material in place to form monkeys-neandrathalsmodern man ect ect.. then why hadnt it formed before the big crash?

It makes sense that the reason it hadnt happened prior was because something very basic,- possible complex.. but none the less.. very important - was missing from the building blocks..


does this not make sense?

2007-09-18 12:18:07 · 10 answers · asked by Matthew David 4 in Other - Science

can you factor -16t^2 + 80t - 80 = 0

2007-09-18 12:16:06 · 2 answers · asked by halle 2 in Mathematics

1/a +1/q = 1/g

solve for q
thanx all answers

2007-09-18 12:12:58 · 6 answers · asked by dreamz 4 in Mathematics

An apple falls straight down from an apple tree growing on a 20 degree slope. The apple falls a distance of 2.5m before hitting the ground. (A) What is the apples speed as it hits the ground? (B) What are the components parallel and perpendicular to the ground of the velocity?

2007-09-18 12:10:11 · 2 answers · asked by Anonymous in Physics

a. equilibrium
b.sodium pottasium pump
c. facilitated diffusion
d. osmosis.

2007-09-18 12:09:53 · 3 answers · asked by Mr. Arkansas 3 in Biology

precal problem

2007-09-18 12:09:22 · 2 answers · asked by dave h 1 in Mathematics

how do i solve this

2007-09-18 12:09:07 · 11 answers · asked by Lyn'cey 1 in Mathematics

Well, i'm in 7th grade and i'm in k-level math (for smart people). So that means I have to learn both 7th and 8th grade stuff. My teacher is really mean and she works really fast. We're learning intergers, decimals and fractions and i'm just not getting it. Any help please?

Ex:

-2.7 + 0.5 =

-1/2 + (-4/2) =

2007-09-18 12:07:27 · 4 answers · asked by Aimee 1 in Mathematics

2007-09-18 12:07:22 · 3 answers · asked by Nap 1 in Engineering

2007-09-18 12:05:38 · 6 answers · asked by Nap 1 in Engineering

A car moves at 12 m/s and coasts up a hill with uniform acceleration of -1.6 m/s^2. How far has the car traveled after 6.0 s?

Soo I'm trying to decide what equation to use... D=VT?
I'm not sure if the 12 m/s if velocity or speed.
Could someone show me how to do this please?

2007-09-18 12:03:37 · 3 answers · asked by Katie E 2 in Physics

Why does a chemical change occur when piece of zinc is in hydrochloric acid & a piece of burning splint is over it?
We did a lab and we put a piece of zinc in hydrochloric acid, placed our thumb over the test tube for one minute, then put a piece of burning splint is over it. I don't understand WHY the chemical change happened. please help me!

2007-09-18 12:02:52 · 3 answers · asked by Stephanieeexoxo 2 in Chemistry

ask for more details if needed

2007-09-18 12:01:22 · 2 answers · asked by Anonymous in Engineering

i have this biology project and i need two more examples of secondary counswers that we eat.it would help alot you could help thanks

2007-09-18 12:00:08 · 7 answers · asked by Alicia V 1 in Biology

2007-09-18 11:57:54 · 6 answers · asked by evie™ 1 in Earth Sciences & Geology

Please explain how u got the answer I do not understand this part of my Chem of how to tell if something produces Neg ions or Pos ions

2007-09-18 11:57:11 · 2 answers · asked by Anonymous in Chemistry

pleasee

2007-09-18 11:55:41 · 2 answers · asked by halle 2 in Mathematics

2007-09-18 11:55:22 · 2 answers · asked by evie™ 1 in Biology

A child in danger of drowning in a river is being carried downstream by a current that has a speed of 2.70 km/h. The child is 0.600 km from shore and 0.800 km upstream of a boat landing when a rescue boat sets out.
(a) If the boat proceeds at its maximum speed of 20.0 km/h relative to the water, what heading relative to the current should the pilot take?
° relative to the direction of the current
(b) What angle does the boat velocity make with the current?
° relative to the direction of the current
(c) How long does it take the boat to reach the child?
s

2007-09-18 11:54:16 · 1 answers · asked by justin l 1 in Physics

what are the abiotic factors that would help grass be the winner? weeds be the winner?


HELP please.

2007-09-18 11:53:06 · 1 answers · asked by singmeasong24 1 in Botany

help

2007-09-18 11:52:49 · 3 answers · asked by Anonymous in Biology