Science & Mathematics - 19 December 2006

with fuming sulphuric acid.

2006-12-19 18:11:49 · 3 answers · asked by janu 1 in Chemistry

can you please explain it in a simplified way?

2006-12-19 18:09:24 · 14 answers · asked by Middle of the Desert 2 in Mathematics

2006-12-19 18:05:42 · 25 answers · asked by Angel 2 in Mathematics

2006-12-19 18:05:06 · 12 answers · asked by james 2 in Mathematics

By the motion of the body we consider its direction.
A body moving towards north with increasing velocity has both directions of velocity and acceleration towards north.
But when a body moves in circle ,acceleration becomes perpendicular to velocity and right hand rule becomes affective.
But why right hand rule is affective when there is no movement in perpendicular direction.

2006-12-19 18:00:13 · 7 answers · asked by hash 1 in Physics

2006-12-19 17:58:34 · 11 answers · asked by ctmme 1 in Physics

my gold chain got contact wiith mercury of broken thermometer .i want to remove it with out informing my parents

2006-12-19 17:57:48 · 5 answers · asked by hum 2 in Chemistry

Please, this is only for serious, informed answers. thanks everyone..

2006-12-19 17:55:39 · 5 answers · asked by James R 1 in Medicine

2006-12-19 17:49:32 · 2 answers · asked by piotr_sosnowski 1 in Engineering

plz tell me the diffrence between these two....

2006-12-19 17:48:12 · 6 answers · asked by Bava 1 in Engineering

Mr.Bricker gets a phone call from his good friend P-Diddy, who wants to build a pool inside his new mansion in Beverely Hills. He wants to build the pool inside. P'Diddy's pool is going to be L-shaped, with a walkway around the outer edge of the pool. To keep things safe for his kids, he also wants to build a fence around the pool. All dimensions will be measured in meters. The walkway will be te same width around the entire perimeter of the pool. The pool's shorter width is equal to 4 times the number of sides of a hexagon, divided by 3. The pool's longer width is 150% greater than the shorter width. The longest length of the pool is equal to the square of the number of teams remaining in te semifinals of any sports tounrmanet. The shorter length of the pool is equal to half a dozen. The pool with its walkway must fit perfectly in a space in the room measuring 552 sq. meters. 1) Help mr.bricker and his good friends find the width of the walway.
2. figure out how much fence is needed

2006-12-19 17:46:16 · 2 answers · asked by Mitch S 1 in Mathematics

if you do, could you please enlighten me?

please and thank you.

2006-12-19 17:42:49 · 5 answers · asked by Anonymous in Biology

2006-12-19 17:40:48 · 3 answers · asked by hash 1 in Chemistry

If a reaction is exothermic, is the change in entropy positive or negative? I know that the change in enthalpy is negative, but I don't know about entropy.

2006-12-19 17:36:25 · 3 answers · asked by uoprummel 2 in Chemistry

The volume 4\3(pi(10^-15)^3 and it's density is 2x10^14 kg/m^3. The desired volume is 4\3(pi(5x10^-19)^3. Could a black hole exert this much force.

2006-12-19 17:34:05 · 3 answers · asked by matthias c 2 in Physics

I know that 1 lbs=3500calories
but how many Newtons equal a kilogram and how many kilojoules equal a kilogram?
so basically what is N=kg=kj??

It's a bit confusing but I'm determined to finally fully learn metric... with some help ^_^

Thank you!

2006-12-19 17:33:54 · 8 answers · asked by pacific_crush 3 in Mathematics

for pedestrians

2006-12-19 17:31:55 · 1 answers · asked by saritha m 1 in Engineering

There will come a time..in the not so distant future.. when we, the entire world will have no choice..but to accept extraterrestrials as real..We will be confronted with the reality of them..the reality of our universe and the reality of what we really are...
Can YOU handle the truth?

2006-12-19 17:30:36 · 21 answers · asked by Entity of Life 5 in Paranormal Phenomena

2006-12-19 17:25:46 · 7 answers · asked by Anonymous in Mathematics

how many grams of soild mognesium chloride, MgCl2, need to be used to make 250 ml of 0.50Msolution?

(MgCl2 molr mass=95.21)

the asnwer is 12 g
but how would you solve this?

2006-12-19 17:23:16 · 4 answers · asked by Christie 1 in Chemistry

2006-12-19 17:22:00 · 3 answers · asked by janu 1 in Chemistry

a company that produces quicklime,CaO, by heating calcium hydroxide, Ca(OH)2

(Ca molar mass=40.08g/mol

the answer is 80%
how would you solve this problem?

2006-12-19 17:21:13 · 1 answers · asked by Christie 1 in Chemistry

How can mammals improve soil?

2006-12-19 17:18:09 · 4 answers · asked by ? 2 in Zoology

I recently saw this article today explaining that a cat, yes...a cat like a pet cat, has been found on Mars. Did anyone else hear about this? This entire time they argue if there is water but they knew of the cat all along!

http://marscat2.ytmnd.com/

Pretty cool that we finally have proof of intelligent life on another planet though! :)

2006-12-19 17:14:42 · 7 answers · asked by Edward 5 in Astronomy & Space

no. of chromosomes in an garlic

2006-12-19 17:12:13 · 2 answers · asked by Anonymous in Botany

how can you tell which is soluble or not in a test? When they ask you if it's percipitated or solid?

2006-12-19 17:11:34 · 1 answers · asked by ..............>.>......... 1 in Chemistry

A cylindrical bar of gold that is 1.5 in high and .25 in in diameter has a mass of 23.1984 g, as determined in an analytical balance. An empty graduated cylinder is weighed on a triple beam balance and has a mass of 73.47 g. After pouring a small amount of a liquid into the graduated cylinder, the mass is 79.16 g. When the gold cylinder is placed in the graduated cylinder (The liquid covers the top of the gold cylinder) , the volume indicated on the graduated cylinder is 8.5 mL. Assume that the temperature of the gold bar and the liquid are 86 degrees Fahrenheit . IF the density of the liquid decreases by 1.0% for each 10 degrees Celsius rise in temperature (over the range 0 to 50 degrees Celsius), determine

a) The density of the gold at 86 degrees Fahrenheit
b) The density of the liquid at 40 degrees Fahrenheit

Please show some work and procedure.

Thanks

2006-12-19 17:01:58 · 1 answers · asked by drifting_fun 3 in Chemistry

once i saw someone with a gyro thing i dunno

2006-12-19 17:01:54 · 5 answers · asked by Anonymous in Physics

when you were 40, and you want to retire. You have one million in the bank, the interest rate is 5%. You take out 75,000 every year. How long can you survive?

2006-12-19 16:59:00 · 6 answers · asked by Mr.Math 1 in Mathematics

How many miles does light travel in 1 microsecond in a vacuum? (The speed of light in a vacuum is 186 000 miles/second.)
A) 0.000 186 miles
B) 0.186 miles
C) 186 miles
D) 1.86 miles

The density of aluminum is 2.70 g/cm3. What is the mass of a cube of aluminum 1.0 cm on each edge?
A) 27.0 g
B) 5.4 g
C) 81 g
D) 2.70 g

If 20 gits equal 1 erb, and 1 futz equals 2 hews, and 10 erbs equal 1 futz, how many gits equals hews?
A) 100 gits
B) 50 gits
C) 500 gits
D) 1000 gits

What are the missing coefficients for the skeleton equation below?
Al2(S04)3(aq) + KOH(aq) ~ Al(OH)3(aq) + K2S04(aq)
A) 2,12,4,6 B) 1,3,2,3 C) 2,3,1,1
D) 1,6,2,3 E) 4,6,2,3

When the equation for the complete combustion of ethanol, C2HSOH, is balanced, what is the coefficient for oxygen?
A)1
B)6
C)3
D)14
E) 7

Use the activity series of metals to write a balanced chemical equation for the following single replacement reaction:
Ag(s) + KN03(aq) ~
A)Ag(s) + KN03(aq) ~ AgN03 + K
B)Ag(s) + KN03(aq) -+ Ag + K + N03
C)Ag(s) + KN03(aq) -+ AgK + N03
D)Ag(s) + KN03(aq) ~ AgKN03
E) No reaction takes place because silver is less reactive than potassium.

2006-12-19 16:58:05 · 5 answers · asked by James O 1 in Chemistry