Science & Mathematics - 21 September 2007

How much speed is needed to launch an oject into the solar system?
How much speed is needed to launch an object into other galaxies?

THANKS A LOT TO THOSE OF YOU WHO GIVE GOOD AND TRUE ANSWERS :-)

2007-09-21 08:52:10 · 13 answers · asked by barbie_044 3 in Astronomy & Space

to be mounted in a full size van for camping and traveling across the country.

2007-09-21 08:50:07 · 3 answers · asked by fg812 2 in Other - Science

I need a way to light up some light bulbs without having a socket to plug something into. I remember building something to conduct electricity when I was younger but we used a very small light bulb. Is there any way I could light up regular size light bulbs??

2007-09-21 08:48:23 · 5 answers · asked by purdue_softball12 2 in Engineering

A, B respectively and move back and meet again at P. Then, is it always true that they have traveled for same time, given that their speeds are different?

2007-09-21 08:46:41 · 7 answers · asked by ʞzɹәႨnɹ 2 in Mathematics

An examle of this would be how would you convert 12.4 g of sucrose (C12H22O11) into moles of sucrose?

2007-09-21 08:44:48 · 2 answers · asked by Robbie B 2 in Chemistry

CaCN2 + 3H2O ----> CaCO3 + NH3

105.0 g CaCN2 and 78.0 g H2O are reacted. Assuming 100% efficiency, which reactant is excess andhowmuchis leftover? The molar mass of CaCN2 is 80.11 g/mol. The molar mass of CaCO3 is 100.09 g/mol.

2007-09-21 08:42:44 · 1 answers · asked by Jack L 1 in Chemistry

This is the problem:
x(x^2+1)(x-2)/(x-1)(x+1) > (or equal to)0

These are the answers I got:
x<-1
0<(or equal to)x<1
x>(or equal to)2

2007-09-21 08:42:25 · 3 answers · asked by lost.in.love 4 in Mathematics

I want to keep a lobster for a few weeks until I eat it. What living conditions do they need and I know they need salt water. Where do I get salt water for my lobster and what do I feed him?

2007-09-21 08:41:42 · 5 answers · asked by Jack 3 in Zoology

2007-09-21 08:37:41 · 6 answers · asked by minh t 1 in Earth Sciences & Geology

The pipe drips at 155 mL/min. Express this in units of gallons/day.

2007-09-21 08:32:20 · 3 answers · asked by GinRum 1 in Chemistry

i know that this seems like a dumb question, but i am supposed to do the following:

Write a balanced molecular equation, including physical states, that describes the
decomposition of magnesium hydroxide when heated in the crucible.

it looks balanced, but i just want to make sure as i am new at this. Thanks for the help.

Mg (OH)2(s) + heat ====> MgO(s) + H20(aq)

2007-09-21 08:27:35 · 3 answers · asked by john s 3 in Chemistry

please help how do you find the square? I do not understand

2007-09-21 08:23:41 · 4 answers · asked by Anonymous in Mathematics

We had an element treasure hunt for physics today and I couldn't find some of the answers. Anyone know any of the answers?

2. Which element is commonly used in making light.
3. Which 3 elements would you find in a chest full of buried pirate treasure (f you're lucky)? ( I have gold and silver , but what is the 3rd?)
12. Which chemical symbol described the state of your head when your teacher asks you a question unexpectedly ?
15. identify the elements with the longest and shortest names.
16. Find the element that has the largest number of protons (It is not Uuo, UUh, or etc because those haven't been discovered).
Which element is named for the person most involved in our ability to blow things up?

Any help is greatly appreciated thanks!

2007-09-21 08:19:16 · 7 answers · asked by Anonymous in Chemistry

I have to differentiate implicityly to find dy/dx for the following equation

x^2 y^2 - x^3 y^4 = 3x

what?

2007-09-21 08:18:35 · 5 answers · asked by drexelusadly 1 in Mathematics

That you are right 100% in any science natural or social?

2007-09-21 08:17:46 · 17 answers · asked by Anonymous in Other - Science

i have to differentiate these

f(x) = (4 - 2x) (8x^2 - 4x)^5

and

y = ln(3x^4 +2x)

how do i do these

i'm not a big fan of math

2007-09-21 08:17:12 · 3 answers · asked by drexelusadly 1 in Mathematics

camel toes?

2007-09-21 08:13:23 · 6 answers · asked by Anonymous in Zoology

lim x-> infinity for 12x+3/3x

how do i do this? i love getting sent home with homework we haven't covered yet

2007-09-21 08:12:08 · 5 answers · asked by alfreddood 1 in Mathematics

the problem is
a) graph 6-x for x = 1 (the = sign has slash through it)
and -5, for x = 1

b) find lim x-> 1 f(x)

c) find f (1)

d) is f continuous at 1?

how do i do this? I have a ti-83 calculator but am NO good with it,

2007-09-21 08:10:58 · 1 answers · asked by alfreddood 1 in Mathematics

2007-09-21 08:08:28 · 2 answers · asked by Bombenhagel 3 in Other - Science

if a force F acts on an object such that its lever arm is zero, does it have any effect on the object's motion? explain

2007-09-21 08:07:28 · 2 answers · asked by DiMaHaZiaF 1 in Physics

Let me reword this. A 30,000 horizontally oriented gallon tank contains 5,000 gallons of anhydrous ammonia (NH3) at 70 F. 3,000 gallons of NH3 at -20 F is added to it. How long does the mixture take to return to 70 F?

The tank is 3/8" thick carbon steel.

The ambient room temperature is 70 F. Assume perfect mixing.

I tried this problem with a thermal resistance network and just got my temperature differences to cancel each other out.

2007-09-21 08:07:08 · 5 answers · asked by paco r 1 in Engineering

2007-09-21 08:03:26 · 14 answers · asked by melemel 1 in Biology

One pump can drain a pool in 8 minutes. When a second pump is also used, the pool only takes 3 minutes to drain. How long would it take the second pump to drain the pool if it were the only pump in use?

2007-09-21 08:01:30 · 5 answers · asked by . 1 in Mathematics

2007-09-21 08:00:07 · 6 answers · asked by :/ 2 in Geography

here it is:

an owner's share of a business is $32,500. The business has grown at a rate of 7% APR compounded quarterly for the last 5 years 3 months. What was the owner's share worth 5 years 3 months ago?

it gives the equation [ A = P (1 + r/n ) ^nt ]

can anyone show me how to do this? I'd really appreciate it.

2007-09-21 07:57:55 · 4 answers · asked by jake p 2 in Mathematics

can anyone help me with this, this is just one of many i dont get

2007-09-21 07:55:26 · 5 answers · asked by jake p 2 in Mathematics

2007-09-21 07:54:17 · 7 answers · asked by honeyroastedeggroll 1 in Physics

2007-09-21 07:52:31 · 4 answers · asked by Anonymous in Mathematics

A hole is drilled through the center of Earth and very long L=100km sealed cylindrical pipe is inserted vertically into the hole. The pipe contains thermally insulated nitrogen gas, which is in equilibrium, has temperature T=400K, and pressure 1atm at the bottom.

Under these conditions the gas can be considered ideal, and pressure of the gas at the top of the pipe is negligible.
Its specific heat Cv = 5/2 R.

The pipe is initially at the surface, and then is very slowly (adiabatically) lowered downward the center of the earth. As gravity decreases, the gas is able to expand and reach higher levels inside the pipe.

What is temperature of the gas when the pipe is half-way down to the center of the earth?

2007-09-21 07:50:50 · 3 answers · asked by Alexander 6 in Physics