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Science & Mathematics - 4 December 2007

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Agriculture · Alternative · Astronomy & Space · Biology · Botany · Chemistry · Earth Sciences & Geology · Engineering · Geography · Mathematics · Medicine · Other - Science · Physics · Weather · Zoology

Explain referring to boiling point.

2007-12-04 12:51:46 · 5 answers · asked by caramel 1 in Weather

Such as if the Universe contained above the requisite mass, the Universe would eventually begin to contract, would that contraction reverse the forward movement of time?

2007-12-04 12:51:00 · 4 answers · asked by Anonymous in Astronomy & Space

A farmer has 4 times the number of ducks as dogs with a total of 36 legs. How do you set up equations?

2007-12-04 12:49:12 · 8 answers · asked by rrogers_1 1 in Mathematics

A silver bar of length 30 cm and cross sectional area 1.0 cm^2 is used to transfer heat from a 100 degrees C reservoir to a 0 degree C block of ice. How much ice is melted per second? (For silver, k = 427 (SI units). For ice, Lf = 334 000 J/kg.)

2007-12-04 12:48:45 · 1 answers · asked by Mark N 1 in Chemistry

In detail from the moment the sun begains to burn fuel in what rate and in what order does it fuse molcule to create the next element up to iron.

2007-12-04 12:48:06 · 3 answers · asked by mommie2b0610 3 in Astronomy & Space

He walks straight north until he is directly northeast of the post; then -always in a straight line- he walks northwest until he is directly north of the post; then west until he is west of it; then southwest until he is west of it; and so on, in a kind of segmented spiral. when he is again due east of the post, how many rods is he from it? show a diagram with all work including the answer and give the formula, with d = distance from post in rods and n = number of segments walked.

2007-12-04 12:46:27 · 1 answers · asked by Anonymous in Physics

The ratio of the opposite to the hypotenuse is .967 and defined to be the sine of the angle c = 75.5 degrees.

How did they find angle c from .967?

Other details: hypotenuse= 8 opposite=7.745 adjacent=2

2007-12-04 12:46:25 · 3 answers · asked by One Love 3 in Mathematics

...and are ginger kids soulless?

World is confusing me really =/

~Ming~

2007-12-04 12:45:22 · 3 answers · asked by Anonymous in Biology

An airplane traveling at 201 m/s makes a turn. What is the smallest radius of the circular path (in km) that the pilot can make and keep the centripetal acceleration under 5 m/s^2?

2007-12-04 12:43:38 · 2 answers · asked by SICK MY DUCK! 1 in Physics

2007-12-04 12:40:36 · 8 answers · asked by bleedred2001 2 in Engineering

What are Radioactive and Synthetic Elements?

(characterists)

2007-12-04 12:40:22 · 1 answers · asked by Kriss 2 in Chemistry

When squaring something, such as this, wouldn't you multiply 6x6?

2007-12-04 12:40:20 · 13 answers · asked by Kay 1 in Mathematics

Which state in the US has the greatest tangential speed as the Earth rotates around its axis? Why?

Thanks

2007-12-04 12:39:43 · 2 answers · asked by Danielle P 1 in Physics

2007-12-04 12:39:37 · 9 answers · asked by terri b 1 in Mathematics

Two parallel plates are uncharged. Does the set of plates have a capacitance? Explain.

2007-12-04 12:38:50 · 1 answers · asked by Jade 3 in Physics

I really needed help i dont have the time to stay after school and ask for help. I am really busy trying to work and take care of my family. I would really thank everyone for their time to help me solve this problem.

2007-12-04 12:38:18 · 1 answers · asked by curiousadult 6 in Physics

Find four solutions for the equation 3x + 5y = 15



This one definitely has me stumped. Any help would be great. Also if you could show me how you come to your answer it would be great. Thanks in advance.

2007-12-04 12:37:19 · 10 answers · asked by Superman 2 in Mathematics

How many fluorine atoms are necessary in the Lewis dot structure of the ionic compound containing calcium and fluorine?

How many lone pairs will be on the carbon atom in CBr4?

Only answer if you are positive!!!

2007-12-04 12:37:02 · 2 answers · asked by Emily 4 in Chemistry

I need help solving this question, and I would really appreciate it if you took the time to walk me through it.

A 100 N block is positioned on an incline that makes a 25° angle. The coefficient of kinetic friction between the block and the incline is 0.15. A force of 125 N is applied by pulling a rope at a right angle of 35° above the incline.

a) (It says to draw free body diagram, but I know that's annoying to do, so can you just label the weight, its components, the friction force, the tension, and its components?)

b) Determine the magnitude and direction of the acceleration of the block.

What I'm having trouble with is that I don't know if factors like the normal force are made the addition of the perpendicular component of gravity as well as the perpendicular applied force of the rope? Or is it difference between the 2, because the rope is being pulled up, sort of relieving the actual perpendicular force of the weight?

2007-12-04 12:33:09 · 2 answers · asked by Andrew 2 in Physics

I'm just starting high school and want to work for NASA in their Mars missions. I have always been intersted in space,and am always out using my telescope. I dont really want to go to space,but want to work on a mission. Like i said im only a kid and have no clue what degrees i should persue. Maybe something in architecture? Fell free to ask me any questions on this page while its up. Thanks in advance.

2007-12-04 12:31:57 · 5 answers · asked by np9455 2 in Astronomy & Space

2007-12-04 12:31:14 · 2 answers · asked by Anonymous in Physics

a(t)=-32 ft/sec squared. An object is thrown vertically down from the top of a 480 foot building with an initial velocity of 64 feet/second.What is the objects velocity right before it hits the ground?

2007-12-04 12:31:02 · 3 answers · asked by jo l 1 in Physics

Here is the problem:
Everything around you is made up of atoms. Atoms are extremely small. An atom is about two millionth of an inch in diameter. Write this number in standard form and then in scientific notation.

I'll give 10 points (if I ever figure out how to...) and best answer to the person who helps me with this question and doesn't give me a stupid answer.

2007-12-04 12:29:45 · 6 answers · asked by mizfits06 4 in Mathematics

This is due tomorow!

How does each of the following affect the time in which particles settle in quiet water when other factors are equal?

A) Size


B) Density


C)Shape

2007-12-04 12:29:40 · 2 answers · asked by Ravtej K 1 in Earth Sciences & Geology

Why is he notedin science

2007-12-04 12:29:16 · 2 answers · asked by L2theL 1 in Earth Sciences & Geology

I've already asked this before but I am looking for a better explanation. It is an infinity sign, and looks like part of the right loop is chopped off. What does it mean?

I am taking Grade 11 physics so please don't confuse me too much. Thanks.

2007-12-04 12:26:20 · 1 answers · asked by myname_isalbert 1 in Physics

I don't understand why I have to take physics in order to study medicine later on!!

How is physics involved with medicine?

2007-12-04 12:25:59 · 3 answers · asked by Anonymous in Medicine

I'm a pisces. What does that say about me?

2007-12-04 12:23:36 · 10 answers · asked by karin 3 in Astronomy & Space

how would i find an equation in polar coordinates if i am given the cartesian equation (x-1)^2-(y+5)^2=-24

i know x=rcos(theta) and y=rsin(theta) and x^2+y^2=r^2. this problem has a negative y^2 so what do i do?

2007-12-04 12:22:51 · 1 answers · asked by ! 2 in Mathematics

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