Science & Mathematics - 19 October 2007

1.cos(inverse)(1-2IxI)/3) + log(base)Ix-1I x where I I represents modulus function.
2. sqrt(sin(inverse)(3x-4x^3)) +sqrt(cos(inverse)x)
3.Find period of sin((piex)/(n-1)!)+ cos((piex)/(n!))

2007-10-19 06:57:41 · 2 answers · asked by Anonymous in Mathematics

name which are strong acid, weak acids or strong base and weak base.

HI

Ammonia

Sulfuric acid


Calcium hydroxide

Hydrofluoric acid

2007-10-19 06:56:49 · 3 answers · asked by Anonymous in Chemistry

2007-10-19 06:56:32 · 5 answers · asked by oliver 1 in Mathematics

a box is given a push so that it slides across the floor. How far will it go, given that the coeffficient of kinetic friction is 0.19 and the push imparts an initial speed of 4.1 m/s?

2007-10-19 06:52:41 · 3 answers · asked by matt c 1 in Physics

2007-10-19 06:50:49 · 6 answers · asked by lilmamachula509 1 in Mathematics

∫∫ xye^(-x^(2)*y) R= {(x,y,) : 0 <= x <= 1 , 0 <= y <= 2}

I'm gettting - (1+e^2)/e^2

Please help.

2007-10-19 06:49:23 · 3 answers · asked by beer drinkers 2 in Mathematics

I need some hoelp with the procedure

2007-10-19 06:47:28 · 1 answers · asked by Jay 3 in Earth Sciences & Geology

Is carbon dioxide heavier than oxygen?

2007-10-19 06:47:08 · 0 answers · asked by Andy H 1 in Physics

2007-10-19 06:36:01 · 1 answers · asked by April M 1 in Chemistry

Finf all critical points and classify as local max/min/saddle:

f(x,y) =x^3 + xy - y^3.

I got:

f(0,0) = 0 ; saddle
f(1,-3) = 25 ; local min
f(3,1) = 29 ; saddle

am I missing any?

2007-10-19 06:34:48 · 5 answers · asked by beer drinkers 2 in Mathematics

2007-10-19 06:29:33 · 8 answers · asked by DEIANARA D 1 in Mathematics

The concentration (M) of HCl in a solution prepared by dissolving 5.5 g of HCl in 200 g of (C2H6O) is __________ M. The density of the solution is 0.79 g/mL. Here are some possible answers.
a. 21

b. 0.93

c. 0.58

d. 1.72

e. 6.0 × 10-4

2007-10-19 06:29:19 · 4 answers · asked by Anonymous in Chemistry

I'm learning about imaginary numbers in Algebra II right now, and I'm thinking, what's the point? If the numbers are imaginary and don't really exist, then why must we learn about them? When would we ever have to use these kinds of numbers in life, like in a job or career of some sort, if they're imaginary and don't exist?

2007-10-19 06:28:19 · 10 answers · asked by Anonymous in Mathematics

Hi,
I wanted to know what would the products be when ethanoic acid reacts with 2-propanol

2007-10-19 06:28:19 · 3 answers · asked by Apoorva K 1 in Chemistry

The original battlebots were especially wimpy because of contest rules and safety, so that it was only a short time before the winners were mostly the ones that had a low profile and flipped opponents. It would have been a lot more fun if we had unlimited class battlebots that brought serious power to see some real destruction. How come it's not been done yet?

2007-10-19 06:27:37 · 2 answers · asked by Scythian1950 7 in Engineering

"Cost $0.79 a pound, cashews $2.49 and pound, and walnuts $1.89 a pound. A store clerk needs to make 2 pounds of mixed nuts using these three types so the total cost is $2.97. If she wants to use 3 times as much peanuts as cashews, find how much of each type of nut she should use?"

2007-10-19 06:27:29 · 2 answers · asked by Anonymous in Mathematics

figure it out

2007-10-19 06:26:47 · 3 answers · asked by Anonymous in Mathematics

2007-10-19 06:24:55 · 7 answers · asked by Anonymous in Chemistry

What is the capacitance in nF?

Capacitance is charge/volts, so 27 x 10^-6 / 450 V = 6x10^-8

and then multiply that answer by 10^-9 to get nF?

2007-10-19 06:24:13 · 4 answers · asked by prime 3 in Engineering

Why???

2007-10-19 06:23:02 · 40 answers · asked by Matt S 1 in Weather

2007-10-19 06:22:31 · 1 answers · asked by sheinfield 1 in Biology

If the Sun's rays are what heat our planet.. then why is it cold between the sun and the earth? the sun rays travel though this space. then why is it not heated as well???

2007-10-19 06:20:20 · 12 answers · asked by yellowstone_rattler 2 in Astronomy & Space

I am supposed to subtract 6 from 15 but I only have 10 fingers. Can I borrow someones hand? I only need one.

2007-10-19 06:14:53 · 13 answers · asked by Anonymous in Mathematics

....and can you explain to me why? I assume it's CH3COOH, because I believe it's a weaker acid, but I am not sure if that is right.

2007-10-19 06:13:59 · 2 answers · asked by cdavis337 2 in Chemistry

A baseball player slides into third base with an initial speed of 4 m/s. if the coefficient of kinetic friction between the player and the ground is .46, how far does the player slide before coming to rest?

2007-10-19 06:13:49 · 1 answers · asked by mmeee 1 in Physics

i got the balance part but i do not know how to get the second can you please tell me what to do and the answers to check if it is right

Hydrogen cyanide is prepared commercially by the reaction of methane, CH4(g), ammonia, NH3(g), and oxygen, O2(g), at high temperature. The other product is gaseous water.
(a) Write a chemical equation for the reaction. (Type your answer using the format CO2 for CO2. Use the lowest possible coefficients.)
2CH4(g) + 2NH3(g) +3 (O2 g)2HCN(g) + 6H2O(g)

(b) What volume of HCN(g) can be obtained from 70.0 L CH4(g), 70.0 L NH3(g), and 70.0 L O2(g)? The volumes of all gases are measured at the same temperature and pressure.

2007-10-19 06:11:56 · 1 answers · asked by My point exactly 5 in Chemistry

A uniform disk with a mass of 35.5 kg and a radius of 0.424 m is free to rotate about a frictionless axle. Forces of 90.0 N and 125 N are applied to the disk, as the drawing indicates.

(a) What is the net torque produced by the two forces?
(b) What is the angular acceleration of the disk?

2007-10-19 06:11:47 · 2 answers · asked by Jerry M 1 in Physics

There's a video on youtube.com of people setting water on fire after AA batteries were soaking in it for 30 minutes.... is it that dramatic? I thought both the gases hydrogen and oxygen produced from that would explode, not burn.

2007-10-19 06:09:55 · 3 answers · asked by Anonymous in Chemistry

y = x^2 * sinh^-1(5x)
y' = ?
I come up with (2x)(sinh^-1(5x) + (5x^2) / (1+(5x)^2)^(1/2)

But i Keep getting a wrong input can someone please help?
I may need to simplify but not shure how

2007-10-19 06:08:39 · 3 answers · asked by Smokey. 6 in Mathematics

2007-10-19 06:08:15 · 8 answers · asked by CaliChick 2 in Astronomy & Space