Science & Mathematics - 15 July 2007

Link me a picture please.

2007-07-15 09:35:46 · 1 answers · asked by ninedone91 1 in Chemistry

lithium metal reacts with water to give lithium hydrogen gas. if 275 mL of hydrogen gas is produced at STP, what is the mass of lithium that reacted?

2007-07-15 09:30:32 · 1 answers · asked by poonam 1 in Chemistry

2007-07-15 09:28:40 · 1 answers · asked by poonam 1 in Chemistry

How can I fill all three housis with Gas , Water , Electric And not cross any lines

2007-07-15 09:25:31 · 3 answers · asked by Anonymous in Engineering

I need to know pretty quickly, I'm in the middle of a timed exam.
Thanks!

2007-07-15 09:20:31 · 4 answers · asked by soccer_girl 1 in Biology

The city of Phoenix (located in the Sonoran Desert) averages nightly lows of 82 degrees in July. Sometimes it doesnt even go below 90 at night.
Likewise for Las Vegas (located in the Mojave desert) Daily highs may reach 115, but nightly lows stay in the 80s.

In the Sahara, it could be 120 at high noon, and literally freezing at night.

So why aren't the American Southwest deserts like that?

2007-07-15 09:15:16 · 4 answers · asked by Anonymous in Weather

the Galapagos Islands, a famous group ofislands due to the visit by Charles Darwin aboard the HMS Beagle in the1830s. What about these islands caused Charles Darwin to be convinced life must evolve by natural selection?

a. Many of the animals on the Galapagos Islands were very similar to
animals seen on the South American coast and their only differences
seemed to be those that had to exist to survive on an island.
b. The life span of most animals on the Galapagos Islands are so short,
Darwin could watch changes in each generation.
c. The Galapagos Islands were unique in the fact no humans had ever
visited them and Darwin could see nature at its essence.
d. Charles Darwin noticed the animals must have evolved independently
from all other species on Earth because no similar animals or plants
could be found anywhere else on Earth.

2007-07-15 09:14:31 · 2 answers · asked by Kat Von D 2 in Earth Sciences & Geology

A coin is flipped repeatedly. One man bets that the sequence TT will come up first, the other bets on HT instead. Is there a difference in odds?

2007-07-15 09:13:16 · 8 answers · asked by Scythian1950 7 in Mathematics

2007-07-15 09:11:42 · 12 answers · asked by Anonymous in Astronomy & Space

2007-07-15 09:08:14 · 11 answers · asked by Anonymous in Geography

2007-07-15 09:05:56 · 4 answers · asked by phil 1 in Geography

It's said to be a perfect cone, but it has a caldera at the top two kilometers wide. It's mostly basalt, but not entirely solid because it's the product of many eruptions -- maybe more like compacted crushed basalt -- I'm not sure.

Please, if you can, include numbers and sources. Thanks.
---------------------

Below is one calculation a friend attempted. Is it close to accurate? If not, what's flawed? I can see, for one, that he's not taking the caldera into account.
----------------------
Mt. Fuji is made almost entirely of basalt. I figured out how much a cubic meter of solid basalt weighs (3011 kg/cu.M).

Mt. Fuji is 3,776 meters tall and about 11,300 meters across at the base.

I then figured out the volume of Mt. Fuji. (area of base * height)/3 or…126,224,799,813 cubic meters.

So the Basalt in Mt. Fuji weighs nearly 380,062,872,237 metric tonnes.

2007-07-15 09:05:33 · 2 answers · asked by Randy R 1 in Earth Sciences & Geology

2007-07-15 09:01:20 · 7 answers · asked by Anonymous in Mathematics

2007-07-15 08:57:49 · 2 answers · asked by JAMES 4 in Engineering

1/x-1 - 2/x^2-1


(x+1)/x^2+2x+1


x^2+3x/x^2+2x-3 divide x/x+1

2007-07-15 08:49:14 · 7 answers · asked by callmejeseca 1 in Mathematics

2007-07-15 08:46:46 · 3 answers · asked by Anonymous in Physics

Write the following as an infinite geometric series, note any restrictions on "r".


f(x)=1/(1-x)

and

f(x)=1/(1-9x^2)

2007-07-15 08:46:33 · 2 answers · asked by Anonymous 1 in Mathematics

1. (4x^2/3y^2) (2y^3/x^2)


2. (x^4/4y^3)(2y/x^3)^3


3. (x^3y^-2/x^-3y^2)^-1



4. 6x^3/y^2 divide 3xy/2

2007-07-15 08:45:50 · 5 answers · asked by callmejeseca 1 in Mathematics

50 just seems like a nice round number and I was curious if anyone could answer this.

2007-07-15 08:44:05 · 10 answers · asked by R E 2 in Geography

A biker is riding at a steady vr=2.1km/hr. When the biker is L=8.8km. from the finish line. A bird then begins flying from the biker to the finish line at vb=6.3km/hr. When the bird reaches the finish line, it turns around and flies back to the biker. We will assume that the bird occupies only one point in space. So the bird has no length.How far does the bird travel.

2007-07-15 08:41:46 · 4 answers · asked by ... :) 2 in Physics

the temperature, T of a person during an illness is given by T(t) = -.1t^2 + 1.2t + 98; for 0 is less than or equal to t which is less than or equal to 12 where T is the temp, (F) at time t, in days, find the maximum value of the tempand when i occurs

i have no idea where to begin

2007-07-15 08:40:30 · 2 answers · asked by Anonymous in Mathematics

2007-07-15 08:39:59 · 5 answers · asked by Anonymous in Mathematics

x^-2y^3

2007-07-15 08:38:51 · 5 answers · asked by Anonymous in Mathematics

2007-07-15 08:35:04 · 7 answers · asked by Anonymous in Other - Science

2007-07-15 08:33:00 · 6 answers · asked by Bobby 1 in Mathematics

2007-07-15 08:29:00 · 8 answers · asked by Bobby 1 in Mathematics

If it were possible for an object to reach absolute zero, would it continue to exist?

ok, so we're all familiar with the theoretical temperature of absolute zero.

at −459.67°F there is a complete absence of movement among particles.

taking this concept into the quantum world becomes a very interesting thing to ponder. if there is no kinetic energy at the sub atomic level wouldn't the science of quantum probability fall apart? if there was zero probability wouldn't that actually erase matter?

i don't know, think about it

2007-07-15 08:28:42 · 9 answers · asked by marcin p 1 in Astronomy & Space

2007-07-15 08:18:49 · 10 answers · asked by Einheart 2 in Chemistry

Out here in good ol' Afghanistan we are wondering why some water bottles freeze over when you take them out of the freezer or when you open them. I would think that if the water was frozen that it would freeze while it was in the freezer, but sometimes as soon as you

2007-07-15 08:15:48 · 2 answers · asked by Anonymous in Chemistry

2007-07-15 08:15:44 · 12 answers · asked by tracyterry 3 in Astronomy & Space