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Science & Mathematics - 16 December 2007

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combination (1) find the current thru the combination (2) the current thru each branch..

2007-12-16 21:53:18 · 4 answers · asked by tobi 1 in Physics

How do I find t
4.0=5.0e^(-t/14960)
Show working

2007-12-16 21:46:41 · 5 answers · asked by Selly 3 in Mathematics

For each quadratic function given below, find its vertex, axis of symmetry, y-intercept and x-intercept, if any. Determine the domain and range of each function. Determine where the functions are increasing and where they are decreasing.

(1) f(x) = x^2 - 4x

(2) f(x) = -3x^2 + 3x - 2

2007-12-16 21:43:42 · 1 answers · asked by journey 1 in Mathematics

2007-12-16 21:27:26 · 6 answers · asked by InvinMona 2 in Mathematics

I have a college assignment to but really stuck on a question, so any help would be great. the exact question is

describe the main elements of the financial planning process in an engineering business and the sequence in which the planning takes place.

you can ignore the engineer bit if you want to - just a general idea to help me out would be good and ill incorporate the engineering bit later

2007-12-16 21:17:14 · 1 answers · asked by Faye 1 in Engineering

please help in solving..

>How many milligrams of NaHCO3 are in a 500mg tablet if 40.00ml of 0.120M HCL is required to neutralize the sample?

>How many milliliters of 0.250M KOH will react with 15.0ml of 0.350M H2SO4?

*all the numbers in the chemical formulas are subscripts

THANKS!!! =D

2007-12-16 21:12:14 · 1 answers · asked by bluespark 2 in Chemistry

How would I equate the ff inc. their products:

1) KHP(aq) + NaOH -->
2) CH3COOH(aq) + NaOH -->
3) H2CO3(aq) + NaOH -->

*all numbers above are subscripts

Thank you very much!!

2007-12-16 21:04:04 · 1 answers · asked by bluespark 2 in Chemistry

I came to know that if we travel at the speed of light than time stops. So if the light travels at it's speed then time should stop for it.

2007-12-16 20:56:30 · 12 answers · asked by Anonymous in Physics

plz include the given and the formula?
our topic is about law of motion

tnx

2007-12-16 20:47:32 · 3 answers · asked by cielo a 1 in Physics

2007-12-16 20:45:56 · 3 answers · asked by Heell yeaah! 3 in Mathematics

Hi.
I need help with the following as I can´t figure out how to get the answer. The textbook show the answer but I don´t know if it is right or how to get it.
Suppose x is a normally distributed random variable with u = 30 and o = 8. Find the random variable, call it a, such that:
P(x > a) = 0.1
Could you please explain each step so I can understand how this works?
How would I proceed if the problem was exactly the same except P(x < a) = 0.1
Thank you.

2007-12-16 20:28:21 · 2 answers · asked by F 6 in Mathematics

impossible by definition? Can their existence only be measured by their effects on other objects in space?

2007-12-16 20:26:38 · 6 answers · asked by Anonymous in Astronomy & Space

A series RLC circuit has a 200 kHz resonance frequency. What is the resonance frequency if
a.) the resistor value is doubled?
b.) the capacitor value is doubled and, at the same time, the inductor is halved??

2007-12-16 20:22:41 · 6 answers · asked by biscuits 2 in Physics

I have a total of 1515 units sold and 1764 units sold. How do i calculate the diff in percentages?

2007-12-16 20:22:27 · 3 answers · asked by shuihang3505 1 in Mathematics

2007-12-16 20:15:15 · 5 answers · asked by Thunder Storm 2 in Astronomy & Space

I know you can buy them in the USA but surely somone in th uk must sell them

2007-12-16 19:55:12 · 4 answers · asked by Jack 2 in Physics

In group IV, the upper elements, carbon can form a giant covalent structure with pure carbon. Under carbon, silicon can form a giant covalent structure with oxygen. Under it, metals come out and they can only form metallic bond.
It is non-metal----> metalloid----> metal when down a group.
I think that metals are metals not because they are metals. But they got the properties of metals. That means they got the properties of metals first, so people classify them into metal. And I think non-metal and metalloid are the same.
What I want to ask is elements in same group, got the same number of outermost shell electrons, but why their properties change down a group? From non-metal to metal. Why elements in the upper of group IV covalent bond together but elements under them become metallic bond? What cause this?
Last, only group IV can form giant covalent structure, so there would be giant covalent structure form by carbon and silicon only, right?

2007-12-16 19:50:37 · 4 answers · asked by Anonymous in Chemistry

10

If you made ice out of "heavy water" how would it differ from regular ice?

2007-12-16 19:49:28 · 3 answers · asked by ? 4 in Chemistry

2007-12-16 19:39:12 · 2 answers · asked by Tim C 1 in Mathematics

For a person weighting 85 N, calculate the mass of the person (1) on earth where g= 9.8 m s-2 and (2) on the moon where g= 1.67 m s-2

2007-12-16 19:35:48 · 2 answers · asked by beutifulgirl 3 in Astronomy & Space

2007-12-16 19:29:56 · 3 answers · asked by simply_gorgeousnesss 4 in Weather

2007-12-16 19:14:10 · 37 answers · asked by Anonymous in Astronomy & Space

what is the difference between velocity is constant and velocity is increasing forwards?

2007-12-16 19:13:34 · 4 answers · asked by sailuvbella 1 in Physics

2007-12-16 19:11:32 · 2 answers · asked by simply_gorgeousnesss 4 in Earth Sciences & Geology

What will be the best answer:
1.He will not reach to South pole
2.He will reach to South pole and will Stay there
3.He will go in to Space by crossing South Pole
4.Any other possibility.

2007-12-16 19:08:16 · 6 answers · asked by sms 1 in Earth Sciences & Geology

Say a town or city is 1000 metres above sea level, is that at low or high tide or do they take an average?

2007-12-16 19:07:48 · 7 answers · asked by Anonymous in Earth Sciences & Geology

the very start of life on earth

2007-12-16 19:04:10 · 13 answers · asked by Anonymous in Astronomy & Space

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