# Questions Asked onAugust 28, 2005

1. ## inverse trig functions

evaluate the following expressions: tan(sec^-1(5/3)) tan(sec^-1(25/7)) cot(csc^-1(5/3)) i know the answers.. i jus don't know how to solve them =( PLEASE help me I assume your sec^-1 notation denot4es the arcsecant function, etc. sec^-1 (5/3) = cos^-1

2. ## *Chemistry

Hydrogen reacts w/ sodium to produce solid sodium hydride, NaH. A reaction mixture contains 6.75 g Na and 3.03 g H2. A. Which reactant is limiting? B. What is the theoretical yield of NaH from the above reaction mixture? C. What is the percent yield if 4 g

3. ## Help me! pls...

what are the physical properties and chemical properties of ammonium cyanate? Go to www.chemfinder.com and search this chemical. It is Urea. Read here: http://www.3rd1000.com/urea/urea.htm Urea and ammonium cyanate are isomers. In the solid state,they have

4. ## jiskha.com will remain ad-free

About 9 months ago I made the decision to pull all banner advertisements from jiskha.com in an effort to make the website more educational and user-friendly. Since my other streams of income have stabalized, I am confident that jiskha.com will remain free

5. ## Physics

I have a hard time solving this problem. The weight of an object at the surface of a planet is proportional to the planet's mass and inversely proportional to the square of the radius of the planet. Jupiter's radius is 11 times Earth's and its mass is 320

6. ## Physics

Someone please help me with this. The speed of ocean waves depends on their wavelength Î» (in meters) and the gravitational field strength g (in m/sË†2) in this way: V=KÎ»Ë†p GË†q Where K is a dimentionless constant. Find the value of the

7. ## Help!

How do clownfish Breed? Does it care for the young? eg male or female taking care, pouch.... Here is Wikipedia's answer: Clownfish lay eggs on any flat surface close to or under protection of their host anemones. These eggs are cared for by the male and

8. ## Math

How are decimals used in everyday life? The main use I can think of is in money. Money is expressed in decimal form. Although for everyday use, we rely on inches, feet and yards for distance, other countries use decimal measures â€” millimeters,

9. ## Math

How are decimals used in everyday life? Not using money How does one measure distance? Take a meter stick, and watch the decimals appear. I am 1.80 meters high

10. ## english

in the book Beowulf what are "the rings" whick are spoken of in the prologue I may be missing something here. The only rings I remember in the prologue is the "Breaker-of-rings"...an important person, or chiefian, whose job it is to break off parts of gold

11. ## chemistry-net ionic equations

Whats the net ionic equation for the decomposition of hydrogen peroxide (H202)? I know that it decomposes into water and O2 but is H202->H20+O2 the net ionic or does the H2 and O2 split up to be H2 + O2 -> H20+O2 and if so is the net ionic then just

12. ## English- literary?

Ok I had 2 eng. questions, what makes a piece of writing literature, and the second was who decides what is literary or not? I got the first question, but no idea on the second one?? Is it publishers and scholarly peers or what? Generally, scholars

13. ## can somebody help me with this

College enrollments in the United States are projected to increase from 1995 to 2005 for public and private schools. The models below give the total projected college enrollments in thousands, where x=0 represents the first year 1995. Public College: f(x)

14. ## another one i need help with

If f(x) = 3x, g(x) = x^2 -1, then find f(g(3))(HINT:The answer to this question should be a number not another function.) g(3) = 9 - 1 = 8, and f(g(3)) = f(8) = 24