Science & Mathematics - 26 September 2007

2007-09-26 11:42:55 · 5 answers · asked by ashhleyy6 2 in Biology

A drop of water on a non absorbant surface looks like a perfect circle. Why does it look this way? What would happen if a small amount of detergent was added?
This is a cohesion and adhesion lab, but I just can't see how it's related.
Thanks,

2007-09-26 11:42:20 · 3 answers · asked by Anonymous in Biology

HOME WORK please help im a total science freak but i need help on this one.

2007-09-26 11:41:48 · 2 answers · asked by Mzbettyboop 1 in Engineering

2007-09-26 11:41:01 · 3 answers · asked by jimmic29898 1 in Botany

(3x+x2) (-5x2-x) three x +xsquared negative5xsquared-x
write the expression without parententhes and slove homework help please test tomorrow

2007-09-26 11:40:08 · 1 answers · asked by Anonymous in Mathematics

2007-09-26 11:38:34 · 3 answers · asked by Anonymous in Biology

what is the answer to this question show procces please
2x-7=5x-4

2007-09-26 11:37:04 · 6 answers · asked by T.S 1 in Mathematics

The five most common elements found in living things are ?
Carbohydrates usually end in the letters ?
Glucose +Glucose =
Maltose + + + I don't get it
Enzymes end in the letter ?
What environmental factors influence enzyme activity
Enzymes and their substrates act like a and a ?

This is all i have left out of a 200 question packet I need help please

2007-09-26 11:36:35 · 2 answers · asked by Anonymous in Biology

The cost of a pizza is $12.50 plus $1.50 for each extra topping. If you have $20.00 to spend then the inequality that you could use to determine the number of extra toppings (n) you could buy is represented by the inequality

1) 1.50 + 12.50n < 20
2) 1.50 + 12.50n > 20
3) 12.50 + 1.50n < 20
4) 12.50 + 1.50n < 20

2007-09-26 11:36:24 · 6 answers · asked by Anonymous in Mathematics

Since most substances like a pear for example are not submerged in solution. what would be the solution for pear cells that water would diffuse into. maybe like the air outside of it???????

2007-09-26 11:35:56 · 3 answers · asked by Nicholas 1 in Biology

How many seconds will it take 10.0 hp motor to lift a 2,000 lb elevator a distance of 20 ft? (b) What was the average velocity of the elevator?

2007-09-26 11:35:05 · 3 answers · asked by Anonymous in Physics

(a) How much work is done in raising a 50 kg crate a distance of 1.5 m above a store room floor? (b) What is the change of potential energy as a result of this move? (c) How much kinetic energy will the crate have as it falls and hits the floor?

2007-09-26 11:34:02 · 3 answers · asked by Anonymous in Physics

2007-09-26 11:33:46 · 5 answers · asked by Piper H 1 in Astronomy & Space

i do not get how to do this math problem at all (trig)
From a point 1.5 mi from a launch pad at cape canaveral, an observer sights a space shuttle at an angel of 10 degrees moments after its launched. After 10s the angel of elevation is 50 degrees.
a) How far does the space shuttle travel vertically during the 10s interval?
b) What is the average speed of the space shuttle during that time interval?
thank you so much

2007-09-26 11:33:38 · 3 answers · asked by brownlocadia 2 in Mathematics

Ok i get the fundamental of Newton's laws. But in this problem, i need to use f=ma to explain how the motion of a stalled car changes when 2 people push it.

I'm pretty sure that m would stay constant. But where do i input the 2 people?

2007-09-26 11:32:49 · 4 answers · asked by dbarr96321 2 in Physics

x(x+1)^1/2

I use the substitution du = 1 dx,
but from that point i have no idea how to integrate the function.

Please provide an explanation thanks.

2007-09-26 11:32:42 · 4 answers · asked by joy vision 3 in Mathematics

Anyone know whether the integral x/(x-1) domain: [2, infinity) converges or diverges? Or the antiderivative of the integral?

2007-09-26 11:32:30 · 1 answers · asked by grayskies 2 in Mathematics

2007-09-26 11:30:39 · 3 answers · asked by se 1 in Mathematics

Need help with school project and nothing online helps. The questions is, name some Oregon towns that lie along the 45th Latitude, thanks for any help.

2007-09-26 11:29:55 · 1 answers · asked by Adam101 1 in Geography

Im not a science geek so i dont know this, but i do know that its a chemical reaction between hydrogen atoms. Tell me more plz! I have a science quiz tomorrow!!!

2007-09-26 11:27:58 · 8 answers · asked by robert_pattinson<3 1 in Astronomy & Space

x(t)=(3.0t^2 -2.0t+3.0)m
from this info how do I find the average speed between t=2 and t=3 and the instantaneous time at t=2.
please give me the step by step process.

Thanks in advance.

2007-09-26 11:26:58 · 1 answers · asked by Twenty20 3 in Physics

A particle moves at a varying velocity along a line and s=f(t) represents the particle's distance from a point as a function of time. t. Please describe the graph in detail and why for f if the average velocity is between t=2 and t=6 is the same as the instantaneous velocity at t=5

2007-09-26 11:26:04 · 1 answers · asked by tigersfan48111 2 in Physics

What number is a positive integer less then 100?
With that number, add 7 more, is it a multiple of 3?
The sum of the digit of the # is a multiple of 5?

2007-09-26 11:22:12 · 4 answers · asked by Beatriz B 2 in Mathematics

2007-09-26 11:21:12 · 5 answers · asked by VERONICA L 1 in Earth Sciences & Geology

I am a solidly scientific-minded person, but I have long been uncomfortable with the Pangea theory. Sure, we have continental drift and it gives a good indication of how the continents are spreading, but what would have caused all the land mass to form on one side of the earth and then break up like it never should have been that way in the first place? What caused the bulge? And why would all of this spreading have occurred so recently, geologically. It seems to me that this would be a good creationist objection to evolution: so many species having such recent common ancestors on this big, single continent? Then it broke up and was separated by oceans? I haven't heard fundies use this objection yet, but I'd like to know, myself.

2007-09-26 11:20:56 · 5 answers · asked by Brant 7 in Earth Sciences & Geology

2007-09-26 11:20:24 · 6 answers · asked by theblondebrat31 1 in Mathematics

i need some practice problems on conceptual physics like can an object have velocity at 0 but still be accelerating
if anyone knows any good websites
Thank You

2007-09-26 11:20:01 · 2 answers · asked by Apanotor 2 in Physics

2007-09-26 11:19:11 · 3 answers · asked by watson101303 2 in Mathematics

Here's my question. On a very hot day you go to an ice cream store. You walk down the aisle and lift the lid to a waist high horizontal freezer and pick up an ice cream bar. You notice that the other freezers are upright and have doors. Which freezer design is better for keeping the cold air in and why?

2007-09-26 11:17:16 · 1 answers · asked by Anonymous in Other - Science

2007-09-26 11:16:30 · 3 answers · asked by Anonymous in Mathematics