Science & Mathematics - 10 December 2006

1. Venus and Earth have nearly the same mass. Therefore, the gravitational pull from the sun is approximately
A. The same for both even though Venus is closer to the sun.
B. greater for Venus because it's closer to the sun.

2.Objects of any size exert a _____ force.
A. Gravitational
B. Balanced

3.One way to increase friction is to use
A. wax
B. Sand

4.One of the largest forces opposing the motion of a car is
A. fluid friction
B. Rolling friction

2006-12-10 09:47:39 · 3 answers · asked by jennifer 1 in Astronomy & Space

I need each step that you did for doing these. For Example:
SbCl5 + 2KI >>> SbCl3 + 2KCL + I2
the steps:
Sb + 2e- >> Sb
+ 2I - 2e- >> I2
----------------------
Sb + 2I >>>> Sb + I2 (^^Is that Right?^^)
If you dont want to do each step, its fine. But i chhose the best answer based on WHATS BEST!!
Here is the Probs:
1) Mn O2 + H2 SO4 + H2 C2O4
2) SbCl5 + 2KI >>>> SbCl3 + 2KCl + I2 << done, but is it right?
3) S + HNO3 >>>> SO2 + NO +H2O
4) HNO2 + HI >>>> NO + I2 + H2O

2006-12-10 09:47:23 · 1 answers · asked by truckin_90 2 in Chemistry

2006-12-10 09:47:23 · 8 answers · asked by bethania 2 in Biology

2006-12-10 09:47:02 · 5 answers · asked by 000123 2 in Biology

I know this is fairly simple to do, but I don't know to set up the problem. Math is my worst subject. Besides the answer, can someone please explain step by step how you got to the answer? Thanks a lot.

2006-12-10 09:46:52 · 10 answers · asked by Anonymous in Mathematics

2006-12-10 09:46:07 · 5 answers · asked by Me<3JB 2 in Biology

for the funtion f(x) = 2x^2-x

2006-12-10 09:45:56 · 3 answers · asked by qz 1 in Mathematics

I live in Washington state. We were amazed to read on below website that in 1998, it was estimated that there were 25,000 black bear in Washington state. This seems like a huge number. I'd love to hear how this number was come up with.

http://www.wdfw.wa.gov/wlm/game/cougbear.htm

I can imagine it involves radio collaring, looking for evidence of bear and knowledge about how large there home range is. Any other info about how this is done would be appriciated.

2006-12-10 09:43:37 · 3 answers · asked by markatger 2 in Zoology

1. Every integer is a whole number.
2. Every whole number is an integer.
3. Every real number is an integer.
4. Zero is both a whole number and an integer.
5. All rational numbers are integers.
6. All integers are rational numbers.
7. The absolute value of an integer is always whole number.


Serious answers only please! Thank you!

2006-12-10 09:42:51 · 8 answers · asked by hi :) 2 in Mathematics

1). 9-x^2=

2). 4x^2 +81-36x =

3). 4y^2+16y+16

4). x^2-25 factor and simplify.
______
x+5

2006-12-10 09:41:35 · 6 answers · asked by Anonymous in Mathematics

The concentration of hydronium ions in a solution with a pH of 4 is how many times that of a solution with a pH of 2???

2006-12-10 09:41:28 · 4 answers · asked by Hope 1 in Chemistry

label A for top, B for left hand side, C for right hand side, and D for bottom

2006-12-10 09:40:21 · 2 answers · asked by you're_a_mango 2 in Physics

* important note: the U used here means "mu" there is no symbol on keyboard for it)


Question:
You invest $10,000 in the Stock Market. The rate is -$10,000 30% of the time. $10,000 20% of the time. Find the expected or average return.

Given:

x -10 10 20 (in thousands $)
P9X=x) 0.3 0.2 0.5



Please solve and show work, thanks.

2006-12-10 09:39:57 · 2 answers · asked by ****** 1 in Mathematics

I am majoring in chemistry because I love it but I have no idea what kind of job I want or what kind of jobs there are out there that I can work toward.

2006-12-10 09:38:42 · 5 answers · asked by BMX emo ranger 1 in Chemistry

A rifle is fired in a balley with parallel vertical walls. The echo fom one wall is heard 1.61 s after the rifle was fired. The echo from the other wall is heard 2.9 s after the first echo. The velocity if sound is 343 m/s. How wide is the valley? Answer in units of m.

I've tried this problem 3 different ways and i got it wrong each time.
I would assume
x1 = (343 m/s)(1.61s)
x2 = (343 m/s)(2.9 s)
x1+x2 = width of the valley. but it's not.

please help!

2006-12-10 09:38:20 · 5 answers · asked by Anonymous in Mathematics

2006-12-10 09:36:48 · 9 answers · asked by Anonymous in Biology

2006-12-10 09:36:20 · 4 answers · asked by sue m 2 in Physics

2006-12-10 09:34:47 · 3 answers · asked by Barbara L 1 in Botany

Evaluate and write the result in simplest form:

(2 3/8)(4/9)

Determine whether the ordered pairs are solutions of the equation.
y - 2x= -1
a. (3,7)
b. (0,-1)
c. (-2,-5)
d. (-1,0)

Find the prime factorization of 420

Use the Commutative Property of Multiplication to complete the statement:
6(x + 2)

Simplify:
7x(x - 6)

The property tax on a house valued at $50,000 is $640. Use the guess, check, and revise strategy to estimate the property tax on a house valued at $75,000.

If a number is decreased by 10, and the result is divided by 2, the answer is 15. Find the number.

To earn at least a grade of B, a student must have an average of at least 80 points on five tests. A student's grades on the first four tests were 79, 83, 89, and 75. What is the least number of points the student must score on the fifth test to earn a grade of B or better? Write an inequality and solve for the score on the fifth test.

2006-12-10 09:34:01 · 7 answers · asked by Advisor 1 in Mathematics

For those of you that answered my first question, I have another.

The price of a gizmo went from $2.50 down to $1.50. Find the percent decrease in the price of the gizmo.

2006-12-10 09:33:38 · 7 answers · asked by Courtney Jane 1 in Mathematics

How many minutes does it take light from the sun to reach the Earth? (Distance from the sun to Earth is 93 million miles; speed of light is 3.00 x 10^8 m/s)

2006-12-10 09:33:33 · 4 answers · asked by Robyn & L 1 in Astronomy & Space

2006-12-10 09:32:48 · 5 answers · asked by lalala 1 in Mathematics

Which of the compounds has the greatest bond polarity?

a) TeO b) IF c) LiF d) HF e) CO

the electronegativity difference in A is 1.4
the electronegativity difference in B is 1.5
the electronegativity difference in C is 3.0
the electronegativity difference in D is 1.9
the electronegativity difference in E is 1.0

looking at that, you would want to say C. but LiF is not covalent, but ionic. When it says which has the greatest "polarity", does that mean it has to be covalent?

2006-12-10 09:30:22 · 3 answers · asked by Anonymous in Chemistry

I know this is not Zoology, but you lot are so clever...
I recently bought a Beagle off the internet. The seller said it was rescued from some test centre somewhere and gave me a bag with something in it. I thought it was Pedigree papers or food. When i got home i opened the bag and there was a packet of 20 JPS fags and a box of matches in there. The dog started to pine and shake, so i put 2&2 together and gave it a ciggy This dog is now on 60 a day and its costing a fortune for me to keep. Its getting to the stage where I wished i had stayed indoors.

Do you think if i bought a Smokers patch and stuck it over his Gob it would help....Im so sick of being ripped off all the time

2006-12-10 09:29:29 · 9 answers · asked by pop c 2 in Zoology

If the mean is much larger then the median, can the values of the variable be reconfigured so that the mean and median are much more similar? this is a broad question on a stat. Assignment I have, there are no statistics and it is not in relation to any given problem just a general question.

2006-12-10 09:29:23 · 3 answers · asked by Hamid S 1 in Mathematics

6x^2-13x+5, I cant get it to factor, thanks.

2006-12-10 09:28:50 · 6 answers · asked by asmith1022_2006 5 in Mathematics

If you went to work for a company and asked them to pay you a penny the 1st day, 2 the 2nd day, 3 the 3rd day. How long would it take you to become a millionaire?

2006-12-10 09:26:36 · 7 answers · asked by Anonymous in Mathematics

2006-12-10 09:25:54 · 10 answers · asked by Anonymous in Astronomy & Space

+Possible advantages of colonizing and/or terraforming Mars or Venus.

2006-12-10 09:25:47 · 3 answers · asked by cooper243 2 in Astronomy & Space

equilibrium constant Kc for the following reaction is 1.40.

H2(g) + CO2(g) <--> H2O(g) + CO(g)

Initially, 0.80 moles each of hydrogen gas and carbon dioxide gas are injected into a 1.00L flask. Calculate the concentration of the H2O(g) at equilibrium.

2006-12-10 09:25:38 · 1 answers · asked by Anonymous in Chemistry