Science & Mathematics - 8 January 2007

1) In their first sets of trials, they had problems because the fuel (propellant) was too_____ and it would ______ the rocket body.

2) The boys worked as a team to find the most ideal fuel for the rocket. That turned out to be pure ______ mixed VERY CAREFULLY with other fuel components to make a thick rubbery material.

3) Not only did the boys launch the rockets but also they collected data such as _____________________________________
_____________________________________

4) Why did they collect this data?___________
______________________________________
______________________________________

5)How did it eventually work toward their advantage?

6) What factor was not caculated in determining the location of the lost rocket?

7) The kids won the regional science fair, but what happened at the state championship?

2007-01-08 13:48:53 · 2 answers · asked by docjnt@sbcglobal.net 2 in Physics

what occurs during a chemical reaction? what are the names given to the various substances that are invilved in a chemical reaction?

2007-01-08 13:45:20 · 2 answers · asked by Anonymous in Chemistry

This is the only question i need to finish, please any help would be useful and appreciated in completing this problem.

2007-01-08 13:45:10 · 3 answers · asked by elisaul 1 in Mathematics

i really need it,,,thank you

2007-01-08 13:45:05 · 2 answers · asked by lola 1 in Mathematics

profit= revenue-cost.
P=16x-0.03x^2-[100+8x-0.1x^2+0.001x^3

2007-01-08 13:44:32 · 2 answers · asked by pugbunny_ash 1 in Mathematics

Does anyone know how much a digital scale would cost that can messure acurate down to 1mg?

2007-01-08 13:44:12 · 3 answers · asked by Im not stupid i just dont care 2 in Chemistry

The Supplements of Angle Proof (no picture given)

***NOTE: < is used for the angle symbol (I dont have a way to make an angle symbol)

Given: < 1 is a supplement of < 2
< 3 is a supplement of < 4
m < 2 = m < 4

Prove: m<1=m<3

2007-01-08 13:43:08 · 1 answers · asked by brighton 3 in Mathematics

How many digits does the number (9)^(9^9) have when written in base nine?

2007-01-08 13:43:02 · 2 answers · asked by ItalianStallion 2 in Mathematics

please help with these problems:

write an equation in standard form, of a line having slope 5 and y-int 6

tickets to a local movie were sold at $5.00 for adults and $3.50 for students. if 280 tickets were sold for a total of $1310.00, how many adults tickets were sold

2007-01-08 13:42:24 · 3 answers · asked by Mia16 3 in Mathematics

Please i need help i have been studying for hours and i am just about ready to burn my calculus books.

2007-01-08 13:42:14 · 2 answers · asked by elisaul 1 in Mathematics

when Mg reacts with FeCI3, magnesium will replace chlorine in the compound.

2007-01-08 13:41:37 · 2 answers · asked by Anonymous in Chemistry

while looking for science fair projects, i came across this, and am considering trying out the experiment:
"I Did a project to dentermine if the processing of food produces gas. I took the fresh, canned, and frozen veggies and grounded them up and mixed each with vinegar, put them in test tubes and placed a balloon over the tube and measured the gas in the balloon. This won first place in the school and regional science fairs. "

my question: how would you measure how much gas there is in the balloon?

2007-01-08 13:40:28 · 3 answers · asked by sxe_afi_fallchild 1 in Other - Science

in a single-replacement reaction, there is only one product.

2007-01-08 13:40:07 · 2 answers · asked by Anonymous in Chemistry

A small town has an adult population of 100. One person is a multi-millionaire who make $5,000,000 per year. The mean annual salary in the town is $74,750. Is the mean a fair measure of a typical salary in the town? What is the mean annual salary of the other 99 adults?
please answer and show work
thanks

2007-01-08 13:39:42 · 9 answers · asked by NABEELiOS 1 in Mathematics

Hi,

I am confused a bit on how to start this one:


Two 3.0 g spheres are suspended from the ceiling on a 1.0m-long rope with each sphere being on a different rope. The two ropes are suspended from the same point on the ceiling. The spheres repel each other after being equally charged. When the spheres repel each other, the rope they are attached on forms a 20 degree angle with the y-axis in each case. So there is a total of 40 degrees apart between the spheres. What is the charge of the spheres?

I am assuming I have to use F = (kq)/r^2 but I am a bit confused as to where to go from there. Any ideas?


Thanks

2007-01-08 13:39:23 · 2 answers · asked by Anonymous in Physics

in direct combination reactions, complex substances form simpler sucstances.

2007-01-08 13:38:26 · 12 answers · asked by Anonymous in Chemistry

Why does potassium nitrate dissolve much more with increasing temperatures?

2007-01-08 13:36:07 · 5 answers · asked by untilyoucamealong04 3 in Chemistry

A fair coin with faces 0 and 1 is tossed repeatedly to see whether the ordered triple 111 or 011 turns up first. What is the probability that 111 will turn up first?

2007-01-08 13:35:57 · 7 answers · asked by ItalianStallion 2 in Mathematics

coefficients are written in front of chemical formulas to balance equations.

2007-01-08 13:35:10 · 17 answers · asked by Anonymous in Chemistry

Please help..
48.Solve the system by substitution.
x + y = 12
y = 2x
50.Solve the following system of linear inequalities by graphing.
x – 3y > 6
3x + 2y > 12
33.A principal of $5000 was invested in a savings account for 4 years. If the interest earned for the period was $400, what was the interest rate?

2007-01-08 13:34:48 · 6 answers · asked by joseph j 1 in Mathematics

2007-01-08 13:33:37 · 15 answers · asked by anonymous 1 in Geography

I don't mean the videos from the outside of the shuttle. I want to see the inside what it's like for the crew and passengers. I'd be interested in seeing videos for other passenger spacecraft too.

2007-01-08 13:32:02 · 2 answers · asked by Anonymous in Astronomy & Space

2007-01-08 13:31:00 · 18 answers · asked by Qu'est ce que tu penses? 6 in Biology

2007-01-08 13:29:27 · 10 answers · asked by im_a_bad_bad_ chick 1 in Earth Sciences & Geology

what evidence is there of ufo is it real or all a hoax i am being serious when i was 12 in NORTH CAROLINA usa i am in the uk now....i thought i saw something in the air hoovering up and then it disapperared when i told my father ofcourse he said i had a high imagination....

did i though i dont know....just curious

2007-01-08 13:29:06 · 18 answers · asked by MissTee 2 in Astronomy & Space

I need to crush up my medication and weigh it out in grams. Actually it will be divided into a half gram dose or one-quarter gram dose.I need to know how a half gram and quarter gram is written so I can choose the right scale to buy. Thanks......

2007-01-08 13:29:04 · 7 answers · asked by peter h 1 in Chemistry

2007-01-08 13:28:55 · 1 answers · asked by sh3lly_143 1 in Biology

the area burned by the florida wildfires was shaped as the figure shown below, label the dimensions and give the area represented by the composite figure.

ok,,so the picture wont come out,,its a RECTANGLE,, it has an (A) on the right,,and a (2A) on the bottom.

thanks for reading,,and whoever gives me the answer or how to do it step by step gets the ten pointer,,,thank you so much everyone!!

2007-01-08 13:28:14 · 9 answers · asked by lola 1 in Mathematics

hey mathmaticians i need help.

2007-01-08 13:26:59 · 1 answers · asked by Anonymous in Mathematics

2007-01-08 13:25:46 · 5 answers · asked by kimberly k 1 in Chemistry