Science & Mathematics - 17 October 2007

2007-10-17 08:04:48 · 1 answers · asked by Anonymous in Chemistry

what steps do you take to solve?

2007-10-17 08:04:13 · 4 answers · asked by d 1 in Mathematics

i need links to websites that can show me what :
acute scalene
obtuse scalene
right scalene
acute isosolese
obtuse isoslese
right isosolese
and equilangular equilateral triangles all look like. if you cant find a website, please explain to me how to make the other ones. please and thank you <333

2007-10-17 07:58:18 · 3 answers · asked by Mrs. Efron <3 2 in Mathematics

2007-10-17 07:56:36 · 1 answers · asked by Anonymous in Mathematics

I like the word hippopotamus. I think it's fun to say. But I have always considered it my "favorite animal" since I was a kid, so I may be biased. Rhinocerous is also fun.

2007-10-17 07:55:51 · 10 answers · asked by SUMMERWE 3 in Zoology

Could anyone tell me approximately how many asteroids there are in the asteroid belt? Thanks! x

2007-10-17 07:52:54 · 6 answers · asked by Twinkle.Hayley 1 in Astronomy & Space

ok, i dont normally do this but its quite urgent, i have maths homework and im running late plz help!

1) A number exceeds four times its reciprocal by 3. find the number forming a quadratic equation.

2) A cyclist travels 40km at a speed of x km/h. Find the time taken in terms of x. Find when his speed is reduced by 2 km/h. If the difference between the times is one hour, find the original speed x forming a quadratic equation.

Plz if u can help... help me :P i know i should be doing my own homework but i have like 30 questions like these still to do! If u can answer one of them, answer... n if both then YAY! i'll give 10 pts for the best answer that will also explain the woking out. THANKS!

2007-10-17 07:50:30 · 6 answers · asked by pwincess_laroosh 2 in Mathematics

I am needing to find out how to convert .06715 & .09350 into fractions like 3/32" or 1/4" of an inch.

2007-10-17 07:48:20 · 4 answers · asked by Terry S 2 in Mathematics

2007-10-17 07:46:57 · 6 answers · asked by Grinning Football plinny younger 7 in Physics

Using a graph of y = x^2 + 4x - 5 to answer the following:
Using the graph, what are the solution(s) to the equation x^2 + 4x - 5 = 0 ? pleas explain your answers looking at a graph?

Does this function have a maximum or a minimum?
What are the coordinates of the vertex in (x, y) form?
What is the equation of the line of symmetry for this graph?


I know this is hard can anyone help please?

2007-10-17 07:45:27 · 3 answers · asked by jllanos73 2 in Mathematics

What is sin(2x)^2 in terms of double angle? How do you get rid of the square? What about cos(2x)^2?

2007-10-17 07:43:21 · 3 answers · asked by V for V 2 in Mathematics

Multiple Choice, need help please...i just cant get it. Anything that has a / through it means it is a fraction.

(12, -3) and (1, -1)

A. -11/2
B. 2/11
C. 11/2
D. -2/11


(0, 1/3) and (1/2, 2/3)

A. 2/3
B. -3/2
C. 3/2
D. -2/3

2007-10-17 07:41:54 · 8 answers · asked by banks.gina 1 in Mathematics

angle theta, in terms of vehicle speed, mass, frontal area, drag coefficient, coefficient of rolling resistance, theta, and acceleration due to gravity. What is the power when the car is 1500kg and the hill is 15 degrees and the vehicle speed is 50mph.

2007-10-17 07:41:39 · 2 answers · asked by Kai K 1 in Engineering

I need this for a test tomorrow. It is asking for the proof for lemma X. According to the discussion in class we know that when you have something like a mod j. that translate into:

a = jq + r where 0 <= r < j
also r has to be the smallest number possible. I just don't know how to go about it. The lema in question is showned below.

Lemma X : Given j > 1 and k > 1. If a mod jk = 1 then
a mod j = 1 and a mod k = 1.

how can I prove that?

2007-10-17 07:40:28 · 3 answers · asked by mr_gees100_peas 6 in Mathematics

2007-10-17 07:38:09 · 1 answers · asked by Caver cg 1 in Earth Sciences & Geology

∴Through the use of a ground-based spectrometer, the atmosphere of a planet has been determined to contain sodium at a concentration of 87.0 x 105 atoms per cm3. Express this in moles per liter.


∴A 1.05-g sample of caffeine C8H10N4O2 burns in a constant-volume calorimeter that has a heat capacity of 7.85 kJ/K. The temperature increases from 297.50 K to 302.52 K. What is the molar heat of combustion of caffeine (in kJ)?

2007-10-17 07:37:34 · 1 answers · asked by trivial obsession 1 in Chemistry

2007-10-17 07:37:28 · 4 answers · asked by .. 1 in Weather

Solve 6x^2 + 3x – 18 = 0 using the quadratic formula.

2007-10-17 07:36:59 · 7 answers · asked by jllanos73 2 in Mathematics

2007-10-17 07:36:06 · 2 answers · asked by stephen D 1 in Mathematics

2007-10-17 07:35:59 · 2 answers · asked by Anonymous in Zoology

suppose the random variable X has a geometric distribution with mean of 2.5. determine the following probabilities.

a) P(X=1)
b) P(X=5)

2007-10-17 07:31:39 · 2 answers · asked by Jack 1 in Mathematics

Just seen this U tube;

http://www.youtube.com/watch?v=K70JzbIgVIE

Can someone explain it? The energy used in the heat given off is obviously from the batteries, but what are the chemical mechanics?
.

2007-10-17 07:30:53 · 10 answers · asked by John Sol 4 in Physics

Find an equation for line ...
***Multiple choice***


Through (8,1) and perpendicular to y = 4/3x + 4.
(4 over 3)

A. y = -4/3x + 35/3
B. y = -3/4x + 7
C. y = 3/4x - 5
D. y = 4/3x - 29/3


Through (5, -6) and parallel to y =-1/2x + 4.

A. y = 2x - 16
B. y = -2x + 4
C. y = -1/2x - 7/2
D. y = 1/2x -17/2


Through (-3, 6) and vertical.

A. x = 6
B. y = -3
C. y = 6
D. x = -3

2007-10-17 07:28:43 · 3 answers · asked by banks.gina 1 in Mathematics

Are there any other professions that deals with genetics?

2007-10-17 07:25:30 · 1 answers · asked by Anonymous in Biology

When reading the Periodic Table of the Elements most Families have the same number of electrons on the first and last shell. For example, Group II Period 2, they all have 2 electrons on the first shell and 2 electrons on the last energy shell. Can anyone explain why some elements do not follow this pattern? The Lanthanide and Actinide Series do not and some on the most common elements (Nb Niobium 2 and 1 while the rest of the Family has 1 and 1) do not follow this pattern. Please explain in simple terms! LOL

2007-10-17 07:24:44 · 1 answers · asked by Anonymous in Chemistry

There is a rectangular piece of carpet with a perimeter of 34ft. Another piece is half as long and twice as wide. It's perimeter is 26ft. What are both's dimensions?

2007-10-17 07:21:22 · 9 answers · asked by Anonymous in Mathematics

1.)
When a given source circuit (Circuit S) is connected to a load resistor, RL, under what condition will the maximum power transfer to the load resistance from the source circuit occur?
A. If the load resistor is an open circuit, RL = ∞.
B. If the load resistor is a short circuit, RL = 0.
C. If the load resistance is one half of the Thevenin equivalent resistance of Circuit S.
D. When the load resistance is equal to the Thevenin equivalent resistance of Circuit S.

and.....

2.)
Mesh current analysis can be used for:
A. Any circuit.
B. Only circuits containing independent voltage sources.
C. Any planar circuit.
D. Whenever node voltage analysis can be used.



3.)
For the current source in a Norton equivalent circuit, the magnitude of the current can be determined by placing a short circuit across the terminals of the circuit, and determining the current through the short circuit. True or False

2007-10-17 07:19:36 · 3 answers · asked by Yahoo 1 in Engineering

i am having real dificulty fing the lowest common multiple of 5445 and 2244 please can anyone help

2007-10-17 07:18:44 · 4 answers · asked by brummie_bykerbabe 2 in Mathematics

A proton (mass 1u) moving at 6.90 Mm/s collides elastically and head-on with a second particle moving in the opposite direction at 2.80 Mm/s.after the collision,the proton is moving opposite to its initial direction at 8.62 Mm/s.FInd the mass and final velocity of the second particle???

2007-10-17 07:06:33 · 2 answers · asked by kian K 1 in Engineering

2007-10-17 07:06:24 · 10 answers · asked by Kary M 1 in Mathematics