Science & Mathematics - 4 October 2007

A particle movies in a plane so its x and y coordinates vary with time according to the equations:
x=.5 * t^3 - 6t and y=.5 * t^2

I need to eliminate the parameter which I found to be:
x= (√2y) * (y-6)

I need the general form of this equation because I need to sketch the curve. Please show all of the work.

2007-10-04 11:11:10 · 2 answers · asked by boricua82991 3 in Mathematics

How many grams of carbon dioxide can form when a mixture of 5.00g ethylene (C2H4) and 3.30g of oxygen is ignited, assuming complete combustion to form carbon dioxide and water?

2007-10-04 11:05:13 · 3 answers · asked by babiiashley 1 in Chemistry

i was watching the omen this afternoon and there was a point when the nanny, (mRs Bayfield) went in to the hospital to first her poorly madam and she had a needle filled with air and jected it in to her drip. this meant the air bubble went in to her blood stream. i know that this is dangerous but why is it fatal. if you inject someone into the vien with air why does it cause them to die????

2007-10-04 11:04:27 · 1 answers · asked by ? 2 in Medicine

Write the equation of the line that passes through the given point and is perpendicular to the given line. Write the answer in slope intercept form
(1, - 5), x= -3/4y + 5
I am so #@%## lost!!

2007-10-04 11:03:37 · 3 answers · asked by calired67 4 in Mathematics

Explain the difference between a waveform point and a sample point.

2007-10-04 11:01:46 · 3 answers · asked by Anonymous in Engineering

what is the units of digits of 1!+2!+3!+4!+...50! ?

please help!
thanks!!!!!!!!!

2007-10-04 10:59:20 · 4 answers · asked by Anonymous in Mathematics

Determine the equivalent resistance between the points A and B for the group of resistors in the drawing. Use R1 = 3 , R2 = 13 , and R3 = 8 . Req = ?????

please SEE THE PIC!
THANK YOU SO MUCH, i really appreciate it....

http://i240.photobucket.com/albums/ff216/jy8686/physics7.jpg

2007-10-04 10:57:03 · 1 answers · asked by Anonymous in Physics

if you stand on a beach, how far away is the horizon - where the sea meets the sky? thanx guys

2007-10-04 10:56:05 · 1 answers · asked by Anonymous in Earth Sciences & Geology

steve ran 12 miles race at average speed of 8 miles per hours . if adam ran the same race at average speed of 6 miles per hours , how many minute longer than steve did adam take to complete race.

2007-10-04 10:54:35 · 7 answers · asked by Anonymous in Mathematics

I'm having problems with this math problem.....Kyle had 36 books in his locker. Some were library books, some were textbooks, and the rest were telephone books. The number of library books and telephone books combined equals twice the number of textbooks. The number of textbooks and telephone books combined equals three times the number of library books. How many of each type of book were in Kyle's locker?

Can you please help? And can you tell me how you got it, too? Also, if you know the answer but don't know how to work it, just tell me the answers. Thanks! =)

2007-10-04 10:48:22 · 6 answers · asked by best.ninja.ever 1 in Mathematics

2007-10-04 10:43:59 · 5 answers · asked by Anonymous in Biology

Given: A (-3, 6)
B (6, 0)
C (9, -9)
D (0, -3)
Prove ABCD is a parallelogram, but not a rhombus

Please help!!!! Going crazy!!

2007-10-04 10:42:02 · 5 answers · asked by Fuzzyglasses 3 in Mathematics

Can someone explain why the reaction of hydrochloric acid with sodium hydroxide is so violently exothermic? I mixed the two together today and the beaker in which the reaction occurred became very hot.

2007-10-04 10:41:43 · 3 answers · asked by AxiomOfChoice 2 in Chemistry

How do you solve this problem?

Calculate the energy change in kJ for the formation of 1.23 mol of LiF(s) given the following information:
Li(g) → Li(s) : −159.4 KJ/mol
F2(g) → 2F(g) : 157.98 KJ/mol
Li(g) → Li+(g) + e− : 520 KJ/mol
F(g) + e− → F−(g) : −328 KJ/mol
Lattice energy for LiF = −1037 KJ/mol

2007-10-04 10:41:38 · 1 answers · asked by izzie 4 in Chemistry

A defibrillator passes a brief burst of current through the heart to restore normal beating. In one such defibrillator, a 40.0 µF capacitor is charged to 6.0 kV. Paddles are used to make an electrical connection to the patient's chest. A pulse of current lasting 1.0 ms partially discharges the capacitor through the patient. The electrical resistance of the patient (from paddle to paddle) is 230 . What is the initial current through the patient?


if anyone can help me with this question,
i would really appreciate it!
please have mercy n help meeee!

2007-10-04 10:39:57 · 4 answers · asked by Anonymous in Physics

2007-10-04 10:38:50 · 6 answers · asked by tuthutop 2 in Engineering

dy/dx = 1 / ( x+e^y)

Please help .....

2007-10-04 10:36:36 · 1 answers · asked by Mohamed A 1 in Mathematics

2007-10-04 10:35:35 · 2 answers · asked by Anonymous in Mathematics

a sledge loaded with bricks has a total mass of 18.0 kg and is pulled at constant speed by a rope inclinded at 20degrees above horizontal. The sledge moves a distance of 20.m on a horizontal surface. the coefficient of kinetic friction between the sledge and surface is .500.
a). what is the tension in the rope?
b). How much work is done by the rope on the sledge
c) what is the mechanical energy lost due to friction

Thankyou!!!

2007-10-04 10:35:19 · 1 answers · asked by Ashley P 1 in Physics

2007-10-04 10:27:50 · 26 answers · asked by Anonymous in Astronomy & Space

On the surface of the Earth,it is approximatley 6200 miles from the Equator to the north or south pole.How many miles is between two parallels 1 degree apart?

2007-10-04 10:27:36 · 3 answers · asked by Anonymous in Earth Sciences & Geology

2007-10-04 10:24:13 · 3 answers · asked by gpapayia 2 in Zoology

marine biologist or singer?

2007-10-04 10:17:47 · 3 answers · asked by imachickennuggetgonebad 1 in Biology

how did the titanic float?
and... how did the titanic sink?

2007-10-04 10:14:00 · 4 answers · asked by Anonymous in Physics

2007-10-04 10:12:00 · 3 answers · asked by hotnerd11 2 in Mathematics

The total cost of Sam’s lunch was $5.40, not including tax. The cost of the drink was one-third the cost of the sandwich and the cost of the French fries was twice as much as the drink. Find the price of each.

2007-10-04 10:10:13 · 5 answers · asked by bollionaire 2 in Mathematics

In a triangular flowerbed the smallest angle of the flowerbed is 6° less than the next larger angle, which is 30° less than the largest angle. Find the measure of each angle. (Remember, the sum of the measures of the angles in a triangle is 180°.

2007-10-04 10:09:28 · 10 answers · asked by bollionaire 2 in Mathematics

I have really wanted to see this galaxy, but I have trouble finding. I have a 114 mm reflector, and a 15 x 70 binocular. Is it possible to view it with these? I have stellarium downloaded already on my computer (thanks).

2007-10-04 10:09:08 · 6 answers · asked by anothercrazyho 2 in Astronomy & Space

A quadrilateral (four-sided plane figure) has sides with lengths that are consecutive odd integers. Find the lengths of the sides of the quadrilateral if the perimeter is 104 feet.

2007-10-04 10:08:43 · 3 answers · asked by bollionaire 2 in Mathematics

A plottractor is an instrument used for drafting, made by Charles Bruning Company. If anyone knows where I can find this instrument please let me know. I already tried Ebay - no luck.

2007-10-04 10:06:07 · 4 answers · asked by lyndas0553 2 in Engineering