Science & Mathematics - 29 January 2007

find the value of x in : 2^x=x^2

2007-01-29 05:44:14 · 7 answers · asked by Anonymous in Mathematics

20,000 pounds epuals how many english tons?
A.)10,000 tons
B.)10 tons
C.)2,000 tons
D.)1 ton

2007-01-29 05:42:47 · 5 answers · asked by babydoll9984 1 in Mathematics

Think carefully, and try to avoid bias (ie picking more physicists if you happen to enjoy physics)

2007-01-29 05:39:30 · 5 answers · asked by Andy 2 in Other - Science

A piece of lead having a mass of 107.5 g is placed in an empty graduated cylinder.
27.0 mL of water is then poured slowly and carefully into the same cylinder.
The final water level would then indicate the total volume of the materials in the graduated cylinder.
What is this total volume in millileters?

2007-01-29 05:38:19 · 1 answers · asked by dannyg11us 1 in Chemistry

2007-01-29 05:36:53 · 3 answers · asked by Steve LG 1 in Astronomy & Space

Will we be hit by an asteroid? Bomb ourselves to oblivion?

2007-01-29 05:36:51 · 7 answers · asked by trer 3 in Biology

well??

2007-01-29 05:36:20 · 9 answers · asked by bayyuhmbabeyy<3 1 in Astronomy & Space

2007-01-29 05:36:15 · 5 answers · asked by crazy leo 1 in Geography

hi
i was wondering how you do logarithms using a calc.
one of the examples in my book is log3 81 = 4. but i dont know how you get that answer using a calculator. how do u imput it into the calculator? ive tried brackets but they dont help. can any one help? thanks

2007-01-29 05:36:03 · 3 answers · asked by just a girl 3 in Mathematics

Question: (a) volume in liters of 2.26 M potassium hydroxide that contains 8.42 g of solute. (b) number of Cu2+ ions in 52L of 2.3 M copper(II) chloride. (c) molarity of 275 mL of solution containing 135 mmol of glucose.

My Work:
(a) 8.42g KOH x (1mol/56g) = .150 mol KOH

2.26mol/L / .150 mol = 15.1 L --- answer

(b) 2.3 mol/1 L x 52L = 119.6 mol CuCl2
119.6 mol CuCl2 x (1mol Cu2+ ions/ 1 mol CuCl2) x (6.022e23 ions/ 1 mol Cu2+) = 7.20e25 ions -- answer

(c) 275 mL x (1L/1000 mL) = .275 L
135mmol x (10^-3mol/ 1mmol) = .135 mol

.135 mol/.275 L = .491 M glucose -- answer

if you see anything wrong PLEASE correct it! thanks

2007-01-29 05:35:50 · 4 answers · asked by Jimmy 3 in Chemistry

2007-01-29 05:35:40 · 3 answers · asked by MrsMac 1 in Geography

2007-01-29 05:35:35 · 6 answers · asked by Santard 1 in Paranormal Phenomena

2007-01-29 05:33:38 · 1 answers · asked by Randy Z 1 in Mathematics

Question Topic: From Civil scale and surveing

2007-01-29 05:31:50 · 1 answers · asked by krishu 1 in Engineering

2007-01-29 05:31:48 · 1 answers · asked by BrItT - BrItT 1 in Zoology

2007-01-29 05:30:36 · 17 answers · asked by Anonymous in Chemistry

2007-01-29 05:30:28 · 7 answers · asked by Anonymous in Weather

Anyone has a good website that i can learn all about HVAC? especially is force-air system. Please help!

2007-01-29 05:30:17 · 1 answers · asked by bonpon2003 1 in Engineering

2007-01-29 05:29:20 · 4 answers · asked by Anonymous in Chemistry

science experiments

2007-01-29 05:28:53 · 12 answers · asked by lovelyshay 1 in Chemistry

2007-01-29 05:28:51 · 1 answers · asked by jus meeee :) 3 in Earth Sciences & Geology

2007-01-29 05:27:26 · 8 answers · asked by Candii c 1 in Astronomy & Space

water

2007-01-29 05:27:19 · 5 answers · asked by lovelyshay 1 in Chemistry

2007-01-29 05:26:18 · 7 answers · asked by Monica 1 in Geography

I've always wondered if anyone ever found Mastodon (mammoth) meat thats been frozen and was still good enough to eat? If so, what does it taste like?

2007-01-29 05:25:53 · 7 answers · asked by questing 1 in Zoology

The roots are:

1) +/- 1/2
2) +/- 2
3) +/- 3/2
4) +/- 1

2007-01-29 05:25:50 · 5 answers · asked by Random G 3 in Mathematics

2007-01-29 05:23:59 · 7 answers · asked by Candii c 1 in Astronomy & Space

Can somebody please tell me? I need to know in the next 5 minutes!

2007-01-29 05:22:45 · 3 answers · asked by jus meeee :) 3 in Earth Sciences & Geology

The experiment involves mixing yeast cells with glucose. What would be the optimum temp. for fermentation to take place?

2007-01-29 05:21:46 · 7 answers · asked by SweetPea 3 in Biology

lipid bilayer of all biological membranes is acting as a capacitor. i want to know the charge density of muscle,epithelial,neuron,endo peri &myocardium cells

2007-01-29 05:20:10 · 1 answers · asked by sreehari.g g 1 in Chemistry