Science & Mathematics - 16 January 2007

2007-01-16 12:51:43 · 2 answers · asked by arsh 1 in Botany

2007-01-16 12:49:12 · 2 answers · asked by Anonymous in Biology

A 10N sign is being held up by two strings, A and B. String A is on the left side and angled at 30 degrees and string b is on the right and is horizonta. What is the tension in string B

I need help for my exam, any ideas??

2007-01-16 12:49:06 · 3 answers · asked by Berry 1 in Physics

what are subscripts?

what are molecules,elements,coumpounds?

stainless steel is a combanation of what twometals?

what are valeme electrons?

what is a anion? cation?

where are alkali metals?

what does polyatomic mean?

what ia a pure substance?

what is vacosity?

2007-01-16 12:49:04 · 3 answers · asked by Anonymous in Chemistry

the angle of elevation of the plane. Frida measures the angle of elevation to be 63 degrees. Agnetha measures it to be 36 degrees. What is the altitude of the plane?

Please show your work! Need help on diagram ><

Thanks!

2007-01-16 12:46:03 · 8 answers · asked by foreverhero14 1 in Mathematics

1. The sum of two rational numbers is rational.

2. The product of two rational numbers is rational.

2007-01-16 12:45:36 · 2 answers · asked by Koomi M 1 in Mathematics

there were a total of 78 handshakes. if each person shook hands once with each of the other people, how many people were at the party?

2007-01-16 12:45:23 · 11 answers · asked by MaggieSin 3 in Mathematics

After taking two soluable compounds and making an insoluable compound, how can I prove I made what I wanted to?

2007-01-16 12:45:10 · 4 answers · asked by A.I.Disguise 2 in Chemistry

I know it takes a long time. I am willing to wait but my patient always dies.

What kind of rooting compound should I use for example ?

2007-01-16 12:45:06 · 3 answers · asked by John16 5 in Botany

2007-01-16 12:44:25 · 6 answers · asked by PsychicPirateHobbit 3 in Mathematics

if so what country has them

2007-01-16 12:43:50 · 2 answers · asked by ANTI-ILLEGAL IMMIGRATION 1 in Chemistry

Solve: x+2/5 - x-2/7 = 4

PLEase explain thoroughly. THANKS!!!!!

2007-01-16 12:43:47 · 7 answers · asked by Orange? 4 in Mathematics

To calculate a person's net pay for a two-week period, an accountant follows these steps :

Step 1: Multiply the first 80 hours of work by the hourly rate of pay.
Step 2 : Multiply any hours over 80 by 1.5 and then by the hourly rate of pay.
Step 3: Add these amounts together.
Step 4: Multiply the amount in step 3 by 7.65% for social security tax and by 25% for federal income tax.
Step 5: Add the two amounts in step 4 together.
Step 6 : subtract the amount in step 5 from the amount in step 3.

Using these steps find the two-week pay for a person who worked 87 hours at $8.00 per hour.


PLEASE explain thoroughly. THANKS!!!!!!

2007-01-16 12:41:41 · 5 answers · asked by Orange? 4 in Mathematics

Let n be a natural number and let a, b, c, and d be integers. Prove the following proposition using congruence modula n where n is a natural number.

1-If a≡b (mod n) and c≡d (mod 8) then (a+c)≡(b+d)(mod n)
2-If a≡b (mod n) and c≡d (mod n), then ac≡ bd (mod n).


If a and b are integers, we will use the notation a≡ b (mod n) to mean that (a) is not congruent to b Modula n.
1-write the contrapositive of the following contidional statement:
For all integers a and b, if a ≡ b (mod 6) and b ≡0 (mod 6) then ab ≡ 0 (mod 6)

2- Is this statement true or false? Please explain

2007-01-16 12:41:34 · 1 answers · asked by aaachooooo 1 in Mathematics

i'm really confused. therefore, i'm desperate for help.

2007-01-16 12:41:24 · 2 answers · asked by alexie. 4 in Chemistry

1) 14 is what percent of 280


2) Determine which number does not belong on the list. Explain your resoning.

25 5
---- 625% ----- 0.625 62.5%
40 , , 8 , ,

2007-01-16 12:40:50 · 9 answers · asked by Kayla 1 in Mathematics

2007-01-16 12:39:46 · 7 answers · asked by chocolatelover 1 in Chemistry

86 people are seated equally spaced around a circular table. They are numbered in order from 1 through 86. What is the number of the person sitting directly across the table from person number 58? Please can anyone explain how to do this? Thanks, your help is much appreciated! ^_^

2007-01-16 12:39:34 · 6 answers · asked by msdrosi 3 in Mathematics

Hey guys, I need some help here please. I have Science Fair project and the purpos is to find out where it is easier to identify sound so I've been looking for websites with information on how the ear works. If you find any web with that information PLEASE give me the website.
Thanks!!!!!

Rascal Flatts #1!!!!!!!!!!

2007-01-16 12:38:21 · 2 answers · asked by ♥-♥-♥ 4 in Other - Science

1) You run for treasurer of the Student Council. Of the 500 students who vote in the election, 325 vote for you. What percent of the votes do you get?

a) 35% b) 65% c) 154% d) 175%


Here is the next problem:

Kelsey runs 100 meters in 30 sec, Julian runs 200 meters in 27 sec, Melinda runs 400 meters in 50 sec. Who runs the greatest average speed?

2007-01-16 12:35:22 · 12 answers · asked by Kayla 1 in Mathematics

2007-01-16 12:35:22 · 10 answers · asked by tychobrahe 3 in Biology

like what are the good parts to live in california where they are not earth quakes. or does all of california have earth quakes? and if all of california has earth quakes what would be a good part to live in?

2007-01-16 12:34:42 · 4 answers · asked by angelina r 1 in Earth Sciences & Geology

is it true that by 2012 the earth will have been destroyed by a metior?

2007-01-16 12:34:29 · 41 answers · asked by Anonymous in Astronomy & Space

2007-01-16 12:34:20 · 10 answers · asked by artsyfartsyma 1 in Zoology

2007-01-16 12:34:00 · 2 answers · asked by Anonymous in Chemistry

Two long parallel wires carry equal currents in opposite directions. (up and down the page, respectively) Wire 1 is to the left of Wire 2 and its current is downwards. Wire 2 has current in the upward direction. Where would a proton moving at a speed of 2 X 10^5 m/s experience a maximum force?

a. between the two wires, moving left towards wire 1
b. to the left of wire 1, moving left
c. between the two wires, heading into the page

Thanks!

2007-01-16 12:33:53 · 4 answers · asked by Wael K 2 in Physics

Has anyone ever done this? Did you catch him?

2007-01-16 12:32:46 · 9 answers · asked by tychobrahe 3 in Other - Science

I had been taking 2 vicodines a day for about two weeks. I stopped taking them yesterday. I was just called for a job interview and am afraid that they may drug test
me. Does anyone know if I will be safe to take a test tomorrow?

2007-01-16 12:30:03 · 8 answers · asked by deziray72 1 in Medicine

2007-01-16 12:29:41 · 5 answers · asked by Anonymous in Engineering

can anyone tell me what percent of transgenic organisms are sucessful and what percent are not? i need this info for a debate in bio class tomarrow.
PS. that is what i want to know, but any good info is helpful(im on the pros side)

2007-01-16 12:29:13 · 1 answers · asked by ari 2 in Biology