Science & Mathematics - 8 December 2007

When you take a bath, how many kilograms of hot water (48°C) must you mix with cold water (10°C) so that the temperature of the bath is 36°C? The total mass of water (hot plus cold) is 192 kg. Ignore any heat flow between the water and its external surroundings.

2007-12-08 15:19:16 · 3 answers · asked by koetjet24 1 in Physics

A thermos contains 145 cm3 of coffee at 85°C. To cool the coffee, you drop two 13 g ice cubes into the thermos. The ice cubes are initially at 0°C and melt completely. What is the final temperature of the coffee? Treat the coffee as if it were water. (See Table 12.2 and Table 12.3 for appropriate constants.)

http://kooch.gamedaemons.net/pictures/12-02tab.gif
http://kooch.gamedaemons.net/pictures/12-03tab.gif

2007-12-08 15:17:40 · 2 answers · asked by koetjet24 1 in Physics

i can't find out what 66=B in the B and 640=A in A S are
please help

2007-12-08 15:16:45 · 2 answers · asked by bunnyfoofoo93 1 in Mathematics

A population of a plant species in a meadow consists of plants the produce red, yellow, white, pink, or purple
flowers. Hypothesize what the inheritance pattern is.

2007-12-08 15:12:50 · 2 answers · asked by Anonymous in Botany

A straight, vertical 43-inch wick was lit from the top and burned downward at the constant rate of 1.5 inches per hour, Three hours later, the bottom of the wick also was lit and it burned upward at the constant rate of 4 inches per hour . How many total inches ha dth etop of the wick burned down when the burning ends met?

2007-12-08 15:12:22 · 3 answers · asked by GF 1 in Mathematics

just kinda curious, I'm studying for a cal final

2007-12-08 15:11:15 · 5 answers · asked by Anonymous in Mathematics

2007-12-08 15:06:46 · 19 answers · asked by ninnx3 4 in Astronomy & Space

(a) a place of embayments.

(b) being dominated by estuaries.

(c) being dominated by barrier islands.

(d) tectonically active and emerging.

2007-12-08 15:04:59 · 4 answers · asked by Aditya G 1 in Geography

After using differnt brands of blue ballpoint pens, I've noticed that the inks smell differently from one another. I have not noticed this when using black pens.

2007-12-08 15:04:46 · 2 answers · asked by mccbuddha 2 in Other - Science

(a) the foreshore dune.

(b) the backshore dune.

(c) the trough between the primary and secondary dune.

2007-12-08 15:04:36 · 1 answers · asked by Aditya G 1 in Geography

I'm attempting to make a structure out of 20 fettuccine noodles and 1 meter of masking tape for a physics project. It has to be able to hold a physics textbook (about five pounds) 5cm or more off of a table without breaking.

I've brainstormed some but am still not sure what to do. Here are my ideas:

3 arches with triangular supports (but it depends too much on the strength of the tape)

columns made out of several noodles taped together - not sure how to connect the columns, though

Any ideas or suggestions?

2007-12-08 15:03:36 · 12 answers · asked by JayJustice 2 in Engineering

what are some of the career opportunities in nanotechnology?

2007-12-08 14:59:53 · 5 answers · asked by Anonymous in Engineering

2007-12-08 14:55:37 · 6 answers · asked by Anonymous in Astronomy & Space

PLEASE HELP>

2007-12-08 14:53:47 · 6 answers · asked by oscar_14_osr 1 in Mathematics

Calculate centripetal acceleration of Earth in its orbit around the sun, and net force exerted on Earth. waht exerts this force on Earth? Assume that Earth's orbit is a circle of radius 1.50 X 10 to the 11th power m.

2007-12-08 14:50:21 · 2 answers · asked by Anonymous in Astronomy & Space

2007-12-08 14:48:16 · 6 answers · asked by jay 1 in Physics

is there an "r" in the Fibonacci Sequence, as the "r" in ar^(n-1)
..how could it be found..?

2007-12-08 14:48:08 · 2 answers · asked by c0cky 5 in Mathematics

2007-12-08 14:47:01 · 5 answers · asked by JennyRocks_PaperScissor 2 in Medicine

2007-12-08 14:44:44 · 1 answers · asked by lala 1 in Botany

Does anyone know a website where I can find pictures of plant families? Such as a picture of Corn for Poaceae and Roses for Rosaceae?

2007-12-08 14:44:17 · 3 answers · asked by gohawks1988 2 in Botany

If we would meet one, it could look totally different from us or quite the same. If the big bang theory is true, then won't the aliens have DNA like us and possibly look like us? Thanks for answering!

2007-12-08 14:43:58 · 13 answers · asked by Anonymous in Astronomy & Space

And which dozens of previous studies have revealed.

http://news.yahoo.com/s/nm/20071208/sc_nm/cancer_germany_dc

...but I guess no answers people care about this either.

Dull, dull, dull, dull...

2007-12-08 14:43:03 · 9 answers · asked by Anonymous in Engineering

Has anyone ever calculated this?

2007-12-08 14:42:38 · 5 answers · asked by Anonymous in Astronomy & Space

2007-12-08 14:42:19 · 2 answers · asked by Anonymous in Mathematics

2007-12-08 14:41:12 · 1 answers · asked by Eric S 1 in Physics

With all this talk of "anti-aging," can we actually stop it or is it beyond the basic laws of physics?

2007-12-08 14:41:05 · 9 answers · asked by green_eyed_gal 1 in Biology

2007-12-08 14:37:31 · 8 answers · asked by Manuel A 2 in Astronomy & Space

2007-12-08 14:36:08 · 11 answers · asked by randgvassar 1 in Mathematics

Calculate the following quantities.
(a) the pressure, in Torr, of 20.7 mol of an ideal gas in a volume of 175 mL at 19.0°C
__________ Torr
(b) the volume, in milliliters, of 46.0 mg H2(g) at 1.45 atm and -40.°C
__________ mL
(c) the mass, in kilograms, of 603 m3 of O2(g) at 709 Torr and 8.00°C
___________ kg
(d) the pressure, in pounds per square inch (psi), of 110 mg Ar(gas) in a 225 mL flask at 43°C
____________ psi

2007-12-08 14:33:49 · 1 answers · asked by Donna L 3 in Chemistry

Please Help I really Want To Watch It

2007-12-08 14:33:48 · 2 answers · asked by logan s 1 in Astronomy & Space