Science & Mathematics - 11 December 2007

Here's the problem:
There is a kayaker that goes upstream 15 miles and back again in 32 minutes. If the current is 5 m/hr then what is the paddlers speed? Please help!

2007-12-11 12:49:22 · 1 answers · asked by Bran muffin 1 in Mathematics

whats a science definition for Average

2007-12-11 12:48:06 · 17 answers · asked by HEY HEY HEY...... 2 in Earth Sciences & Geology

I am doing a report on Potassium and inorder to get an A i need some really weird and interesting facts on Potassium. I appreciate the help.

2007-12-11 12:45:28 · 15 answers · asked by Anonymous in Chemistry

By Studying genetic traits, do scientists in turn study the inheritance of human traits? Why or Why not? 10 points to right answer. or best. =)

2007-12-11 12:45:03 · 5 answers · asked by ~!Ashley!~ 3 in Biology

2007-12-11 12:44:54 · 8 answers · asked by Anonymous in Astronomy & Space

please help me
thanks:)

2007-12-11 12:44:36 · 1 answers · asked by Anonymous in Earth Sciences & Geology

Each student listed has taken 3 math tests. Find the score each student needs on the next test in order to have an 80 average!!?!?!
(test 1 then 2 then 3 then the line is where the answer goes)
Bill-78,78,78 _____
Jill-68,79,74 _____
Phil-72,82,82 _____
Will-91,64,76______

PLEASE HELP! i don't get it!

2007-12-11 12:44:07 · 10 answers · asked by dancerkinzi 1 in Mathematics

why is it safe from black holes and why the colony is safe

2007-12-11 12:43:41 · 1 answers · asked by Shawn 1 in Astronomy & Space

Write x= -2 in standard form using only integers and a positive coefficient for x?

Ok so I have two points (-2,2) and (-2,0) so the slope is undefined and the only equation I have is X= -2 but i have to make into standard form with a positive coefficient for x. choices for answers are:
a) x+3y= 6
b) x-3y= 2
c) -x+3y= -6
d) x-3y= 6

please help, ive tried solving for x to get -2 and using the coordinates also but nothing works!

Additional Details

technically its a two part question, in the first one it gave me the points (-2,0) and (-2,2) and asked for the slope which came to 2/0 or undefined since you cant divide by 0. the second problem is exactly worded:

Write the equation in standard form using only integers and a postive coefficient for x.

2007-12-11 12:43:31 · 2 answers · asked by Aquamarine 3 in Mathematics

how does acetic acid affect plant growth. if acetic acid can damage plants... what makes acetic acid damage plants and how?

2007-12-11 12:40:26 · 2 answers · asked by Anonymous in Chemistry

I need help getting to the answer of this question.

Mr. R , a college instructor, can grade his class papers in 3 hours while it takes his assistant 4 1/2 hours. If Mr. R graded the papers for 1 hour and then left the job for his assistant to complete, how long will it take his assistant to finish grading papers?
Answer = 1/3 hours

This is what i did and i still can't get the answer
1/3 + (1/4.5)x = 1

2007-12-11 12:40:20 · 4 answers · asked by KoF 2 in Mathematics

science test tmr and i dont get thissss .....help??

2007-12-11 12:38:14 · 2 answers · asked by Anonymous in Physics

I've been seeing ghosts in the traditional sense forever. But there are other things that find me. They don't look human, and would terrify anyone else, but I put aside fear a long time ago to find out what they wanted. They need me to "take" them home, but I can't always figure how. So then they just come with me until I can find the right "thin" spot. I Have been clinically dead 3 times already, and i think I left a signature out there that they can find me with. I think when I die, I will be a much better help to these things, but I'm still alive and my head is starting to get very busy. Can anyone tell me what's going on? Oh, and I'm not psychotic, thank you very much.

2007-12-11 12:35:22 · 14 answers · asked by Phoenix M 4 in Parapsychology

1) Under what conditions does a glacier retreat ?
2) Which one happened first ? Pangaea or Hard Parts ?
3) What does unconformity indicate about the geologic history in an area ?
4) Which organism have the best chance of being preserved as fossils ?

please help me, i am confused about these questions...

2007-12-11 12:34:35 · 3 answers · asked by Anonymous in Earth Sciences & Geology

Has the scientific world ever located the center of the universe?
In the event the center of the Universe has been determined, would that mean the planets/stars closest to the center would be the oldest?
The latter would be a good assumption that any form of life would have originated in this region?

Edge of space?

Let us say we could develop a concept where we could travel to the very edge of space.
1. As space expands our movement through space can exceed the latter, if we push past the edge of space where would we be?
Perhaps, in another dimension?

I am not a science major only a theologian with many degrees.
Furthermore, i use many forms of reasoned discourse to analyze life.
However, i respect science since it is also a mystery that is before our eyes each day.
Please, no jokes only answeres with some substance.

2007-12-11 12:34:01 · 8 answers · asked by Kazoo M 7 in Astronomy & Space

How would it affect our weather? Our natural resources? The mantle of the earth? Earths orbit and rotation? What if lightning hit it? How often would that happen? What if it got hit by a meteor? What if it toppled over? How much would it cost to build? What kind of steel and other materials would we have to use to support all that weight? How big would the foundation have to be? How long would it take to build?
(Forget about the facts that we could not survive being in space because of UV rays, X-rays, no Oxygen, no gravity there, forget all that stuff and lets just say WHAT IF here.) I just want to see what kind of ideas people can come up with.

2007-12-11 12:32:12 · 1 answers · asked by Anonymous in Engineering

I know that if you bury the object extremely deep in sand, debris, etc., that the metal detector may fail to pick it up, but is there a material that actually blocks or diverts the electromagnetic waves of the metal object?

2007-12-11 12:28:34 · 4 answers · asked by Al Shepard 2 in Engineering

what are genetic marker?

2007-12-11 12:27:19 · 6 answers · asked by Michael 1 in Biology

Ok, if there is a bag containing 2 red, 6 blue, 7 yellow, and 3 orange marbles, and once a marble is pulled it is not replaced, what would be the probability of pulling 2 yellow marbles in a row, and then an orange marble? This is what I came up with, and wanted it checked over:

Probability of first yellow: 7/18
Probability of second yellow: 6/17
Probability of third being orange: 3/16

Multiply the three together to get: 7/272

Is that right?

2007-12-11 12:26:07 · 2 answers · asked by speedndelko4u 1 in Mathematics

A PURCHASE IS MADE UNDER FOLLOWING CONDITIONS. tHERE IS A 25% DISCOUNT BECAUSE OF A SALE, A 10% DISCOUNT BECAUSE OF THE SIZE OF THE ORDER , AND A 5% DISCOUNT FOR NOT USING A CREDIT CARD. tHE DISCOUNTS ARE TAKEN SUCCESSIVELY. IF A CUSTOMER PAYS $1385.10, WHICH INCLUDES AN 8% SALES TAX, WHAT WAS THE ORIGINAL PRICE BEFORE TAX AND ANY OF THE DISCOUNTS?? (SUCEESSIVELY MEANS DISCOUNTS TAKEN ONE AT A TIME, NOT TOGETHERE)

2007-12-11 12:24:52 · 7 answers · asked by YIA123 2 in Mathematics

I need to be able to determine the graphs direction, identify the vertex point and any axis interceptions. Please help. Serious answers only

2007-12-11 12:24:35 · 1 answers · asked by Anonymous in Mathematics

I HONESTLY HAVE NO IDEA HOW THIS DONE

(X-0)=-8(Y-0)

2007-12-11 12:18:12 · 2 answers · asked by Anonymous in Mathematics

Use the mass and radius of the moon.
mass=7.4x10^22 kg
radius=1.74x10^6 m

A. what is the weight of a 80.0 kg astronaut on the surface of the moon?

B. how many times smaller is this from the astronauts weight on earth?

i got anwsers but i wanna make sure their right cuz this is for a grade so if u could please help that would be great!thanks

2007-12-11 12:15:41 · 2 answers · asked by beachjim@sbcglobal.net 1 in Astronomy & Space

a. determined.
b. differentiated.
c. totipotent.
d. genomically equivalent.
e. regulated.


my book is zero help. i can not find this one anywhere. please help :/

2007-12-11 12:15:11 · 3 answers · asked by John Kastingo 1 in Biology

Always Sometimes Or Never

2007-12-11 12:14:50 · 7 answers · asked by Mijail S 2 in Mathematics

The specific heat of aluminum is .902 J/g Celsius. how much heat is absorbed by an aluminum pie tin with a mass of 473 g to raise its temperature from 23.00 Celsius to 191 Celsius?

Strontium carbonate can be produced by combining strontium metal, graphite (C) and oxygen gas. the formation of one mole of SRCO3 releases 1.220x10^3 kJ of energy
write a balanced thermochemical equation for the reaction,
what is delta H when 10.00 L of oxygen at 25 Celsius and 1.00 atm is used by the reaction?

2007-12-11 12:14:40 · 1 answers · asked by Anonymous in Chemistry

i need 2 know wat r some good and bad things about it are and how telescopes effect us and can u give me some websites plz ty

2007-12-11 12:03:23 · 4 answers · asked by marc 1 in Astronomy & Space

You are offered two jobs selling textbooks. One company offers an annual salary of $20,000 plus a year-end bonus of 1% total sales. he other company offers an annual salary of $15,000 plus a year-end bonus of 2% total sales.

Determine the annual sales required to make the second offer better.

2007-12-11 12:02:17 · 11 answers · asked by Anonymous in Mathematics

2007-12-11 11:57:34 · 4 answers · asked by cheyenne b 1 in Chemistry

2007-12-11 11:57:29 · 2 answers · asked by Anonymous in Earth Sciences & Geology