Science & Mathematics - 5 July 2007

Need sources fo my final exam

2007-07-05 08:22:50 · 11 answers · asked by DC 1 in Engineering

I know that 3 to the third power is 27 but how much is 4 to the power of 0?

2007-07-05 08:21:37 · 9 answers · asked by Anonymous in Mathematics

1) when Courtney collected her change she realized that she had 5 times as many dimes as quarters. Her dimes and quarters totaled $5.25. How many quarters did she have>

2) A store manager bought "c" calculators for $8 each.All but 4 were sold for $10 each, The remaining four calculators were not sold. Find the store's profit in terms of "c".

thanks for helping. :)

2007-07-05 08:20:28 · 8 answers · asked by Anonymous in Mathematics

You are travelling in a sealed box car that left the station several minutes ago and is accellerating smoothly, at a constant accelleration of 0.1 G.

You're bored so you tie the ballon to the center of the floor with 1 meter of string.

Does the balloon float straight up, lean toward the back or lean toward the front? Why? If it leans, how much?

2007-07-05 08:19:10 · 10 answers · asked by Doug S 4 in Physics

and why?

2007-07-05 08:17:16 · 31 answers · asked by Anonymous in Other - Science

Which of the following slightly soluble substances are more soluble in acidic solution: AgCl , AgCN , CaF2 ? Can you please explain why? Thank you very much

2007-07-05 08:13:41 · 2 answers · asked by Rnx 2 in Chemistry

2007-07-05 08:13:14 · 2 answers · asked by Anonymous in Earth Sciences & Geology

2007-07-05 08:06:52 · 8 answers · asked by hillio m 1 in Earth Sciences & Geology

Thank you for your help =)

2007-07-05 08:01:03 · 3 answers · asked by Rnx 2 in Chemistry

9. In the compound, CaNa[Fe(CN)6], what ligands are in the coordination sphere?
A. Ca2+
B. Na+
C. CN-
D. H2O
E. none of these
10. What are the respective central-metal oxidation state, coordination number, and overall charge on the complex ion in
Na2[Cr(NH3)2(NCS)4]?
A. +3; 6; -1
B. +3; 6; +1
C. +2; 6; -2
D. +2; 4; -1
E. +1; 6; -2
11. In the following reaction, Ni2+ is acting as a(n) __________.
Ni2+ (g) + 6H2O (l) → Ni(H2O)62+ (aq)
A. oxidizing agent
B. Lewis acid
C. precipitating agent
D. solvent
E. ligand
12. Which one of the following species is paramagnetic?
A. Cu+
B. Cr3+
C. Zn
D. Ca
E. Ag+
13. How many d electrons are in the cobalt ion of K3[Co(CN)6]?
A. 3
B. 5
C. 6
D. 7
E. 4
14. What is the charge on the complex ion in Mg2[FeCl6]?
A. 2-
B. 2+
C. 3-
D. 3+
E. 4-
15. What is the oxidation number of chromium in [Cr(NH3)4Cl2]Cl?
A. -3
B. +3
C. +2
D. -2
E. 0

2007-07-05 07:59:43 · 2 answers · asked by lilmace24 1 in Chemistry

I'm interested in subject books and all-inclusive books. Which books have you found to be most helpful? I've looked mostly at the Princeton Review books and the Kaplan books. I'm grateful for any opinions!

2007-07-05 07:57:52 · 3 answers · asked by Anonymous in Medicine

2007-07-05 07:54:58 · 6 answers · asked by Anonymous in Mathematics

When you ask someone what is gravity the standard answer is the force that binds us to this planet or from the plebes ..WOT HOLDS US DOWN ???? I want to know what is the specific force called Gravity as light is a radio particle what is Gravity ? as water is a chemichal combination H20 . What is Gravity we all know what Newton said it was but what do you think it is .

2007-07-05 07:54:48 · 22 answers · asked by vortash2 2 in Physics

I am dring a car at constant speed, say 65 mph, on a freeway.
What Is the wind pressure on the car if
a. I close all the car windows.
b. I open one car window
c. I open all car windows.
I am trying to use as little gas as possible when driving .
Please explain or prove your answer. Thank you.

2007-07-05 07:52:14 · 4 answers · asked by buoisang 4 in Physics

is it eternal?

2007-07-05 07:51:37 · 8 answers · asked by Anonymous in Astronomy & Space

How do you prove a function when one of the components is only specified as an integer?

For example, how would you prove this function?

Prove: n^5 - n is divisible by 10 for all n is greater than or equal to 2.

Thanks in advance.

2007-07-05 07:51:36 · 5 answers · asked by Antonio P 1 in Mathematics

1.a^2-9
2.4a^2-4a+1
3.y^2+16y+64
4.81r^2-36rs+4s^2
5.x^2+3x+2
6.x^2+8x+12
7.72-22x+x^2

2007-07-05 07:51:09 · 4 answers · asked by brandon_burdette 1 in Mathematics

"wind and breeze can develop of local tempurature difference. compare and contrast theese breezes and explain why they form. you must cover atleast 4 of the 6 local breezes."

2007-07-05 07:49:12 · 2 answers · asked by hillio m 1 in Earth Sciences & Geology

1.(x+5)(x+2)

2.(x-2)(x-2)

3.(x+5)(-12)

4.(3c-4d)(2c+5d)

5.(5x-3)(3x-8)

2007-07-05 07:41:20 · 6 answers · asked by brandon_burdette 1 in Mathematics

2007-07-05 07:37:38 · 10 answers · asked by Anonymous in Earth Sciences & Geology

A barrel contains only apples and oranges. There are twice as many apples as oranges. The apples are either red or yellow, and 4 times as many apples are red as are yellow. If one piece of fruit is to be drawn at random from the barrel, what is the probability that the piece drawn will be a yellow apple?

2007-07-05 07:33:58 · 7 answers · asked by Anonymous in Mathematics

please help
solve by compeleting the square. round your answer to the nearest tenth, if necessary?

2007-07-05 07:32:52 · 2 answers · asked by king 1 in Mathematics

such that no one is equal to arithmetic mean of any other two?

2007-07-05 07:31:00 · 3 answers · asked by Alexander 6 in Mathematics

I keep getting folks that have good intentions but they reveal themselves. They say I am nuts because I follow Stargate. How do they know what is in Stargate? I refuse to watch any thing on TV or the movies. Apparently the audiences the networks claim to have are accurate. My suggestion to escape college is graduate your mind. Throw away you cap and gown. Eat your diploma.

2007-07-05 07:24:18 · 5 answers · asked by Anonymous in Astronomy & Space

i have a square 5cm by 5cm and there is a diagonal line going through a corner.The length of the diagonal is ycm.Show that the value of y is the square root of 50.

2007-07-05 07:23:27 · 14 answers · asked by Top_Gear_Biggest_Fan 5 in Mathematics

Find the equations of all lines tangent to y = 9 - x^2 that pass through the point (1,12).

2007-07-05 07:23:11 · 2 answers · asked by salmonella_jr 3 in Mathematics

6. If you double the radius of the aluminum cylinder that was used in this lab, how much should the buoyancy force acting on it change (assume submerged in the same fluid)?

2007-07-05 07:23:04 · 3 answers · asked by NATTY 1 in Physics

1. When solids are dissolved in a liquid the solid take up the spaces between the liquid molecules. If I have 2 containers and I dissolve 50grams of salt in one and 50 grams of sugar in the other, which container would provide your aluminum block with a greater buoyancy force (assume both completely dissolve)?
2. If quick sand is really just sand suspended in water would you expect a person to sink like they do in the movies? (Hint: you can think about this as if the sand was dissolved in the water to good approximation).

2007-07-05 07:22:31 · 2 answers · asked by NATTY 1 in Physics

i want to know about the god

2007-07-05 07:21:54 · 9 answers · asked by Anonymous in Astronomy & Space

1.Suppose Spaceman Spiff flies his spaceship into Lake Superior on Wednesday, August 23rd 2000. The spaceship is 234 kg and, due to its air tight protective forcefield we can consider it to be a sphere (volume = (4/3)πR3). When Spaceman Spiff flies into Lake Superior he floats with only the small caution light floating (negligible mass) above the surface. What is circumference of the spaceship in cm? Remember that the circumference of a circle is 2πR.
2. Explain why fresh water boats can travel in the ocean while some ocean faring boats cannot travel in fresh water.
3. Suppose I give you an object that I say is made out of gold (density of 19.3 g/cm3). The object has a volume of 10mL and has a mass of 180 grams. Am I lying if say it is made out of solid gold?

2007-07-05 07:21:30 · 4 answers · asked by NATTY 1 in Physics