Science & Mathematics - 14 December 2007

wit 6 angles

2007-12-14 03:34:14 · 13 answers · asked by Anonymous in Mathematics

2007-12-14 03:33:49 · 2 answers · asked by Neda J 1 in Biology

2007-12-14 03:32:58 · 19 answers · asked by Old enough to know 2 in Geography

A 2 kg cube of iron at 300 C is placed on a 5 kg block of ice at 0 C. How much ice will change to liquid water at 0 C the specific heat of iron is 450 and the heat of fusion of ice is 3.34x10^5

2007-12-14 03:30:41 · 1 answers · asked by Katie E 2 in Physics

I know that dry ice sublimates when water is added to it. even very cold water. but is there a temperature at which it acutally melts? litterally going from solid to a liquid?

2007-12-14 03:30:28 · 9 answers · asked by Danni 2 in Earth Sciences & Geology

I am confused as to how to go about this problem. We are studying optimization in calculus. Thank you for any help!

If 1200 cm^2 of material is available to make a box with a square base and an open top, find the largest possible volume of the box.

2007-12-14 03:28:44 · 2 answers · asked by sg88 1 in Mathematics

2007-12-14 03:27:45 · 9 answers · asked by simplesimon 5 in Astronomy & Space

If power is the product of voltage and current (P= IV) and voltage is the product of current and resistance (V= IR), what equation gives the relation among power, current, and resistance?

2007-12-14 03:27:06 · 3 answers · asked by Shae 2 in Engineering

2007-12-14 03:25:36 · 11 answers · asked by keith 2 in Zoology

5: Perimeter = 55. AB = 11 + 2x. BC = 7x - 14. AC = x + 18.
Equilateral
Isosceles
Scalene

2007-12-14 03:20:33 · 7 answers · asked by Anonymous in Mathematics

I'm writing a SQL query which calculates the average daily water usage for a utility company.

Usage reads come to us in the following format:

ReadBegin (start date of meter reading)
ReadEnd (end date of meter reading)
Volume (in Liters)

The meter reads have a ReadBegin and ReadEnd typically crossing month boundaries, for example, 3/31/2007 and 4/13/2007. Most months there is only a single read for the month, but occasionally there are two.

My question, say you have these reads in a given month:

3/1/2007 - 3/31/2007, average daily usage 100.10 L
3/31/2007 - 4/13/2007, average daily usage 39.4 L

What would be the proper way to factor in the average daily usage for 3/31, since here there are essentially two meter reads (and therefore two ranges used to calculate averages) used?

I was thinking that for March 1 - 30, I would use 100.10 (the ADU for the first read), and for March 31 I would use the average of the two averages, 100.10 + 39.4 / 2.

2007-12-14 03:20:14 · 3 answers · asked by Anonymous in Mathematics

2007-12-14 03:18:18 · 3 answers · asked by Anonymous in Earth Sciences & Geology

2007-12-14 03:17:18 · 2 answers · asked by Mark A 1 in Weather

I am the only one in my house who blows the lights and fuses around 5 per week, it never happens to anyone, was wondering if some one could shed some light on this situation. could it be something to do with paranormal activity?

2007-12-14 03:14:26 · 26 answers · asked by Anonymous in Paranormal Phenomena

2007-12-14 03:12:24 · 10 answers · asked by Nicholas L 1 in Mathematics

2007-12-14 03:12:00 · 4 answers · asked by Mark A 1 in Astronomy & Space

Volcanoes on the Earth eject rocks at speeds of up to 110 m/s. Consider a 1000 m high volcano which ejects rocks in all directions. What is the maximum height above sea level reached by rocks?




What is the maximum horizontal distance at sea level reached by the rocks?

2007-12-14 03:09:54 · 3 answers · asked by Monty 1 in Physics

Will iron injections help then as really suffering and unable to look after kids and work affected.

2007-12-14 03:09:36 · 6 answers · asked by janet f 1 in Medicine

(11-square root of -5)(-4+ square root of -5)
A=-39+15i square root (5) B=-39-15i square root (5)
C=39+15(5) D= 39+15i square root 5

2007-12-14 03:08:11 · 7 answers · asked by ivan m 2 in Mathematics

What is Quadrature for unequal subdivision of the range of integration? please explain

2007-12-14 03:04:23 · 2 answers · asked by karan s 1 in Mathematics

A projectile is fired at 45.0° above the horizontal. Its initial speed is equal to 127.5 m/s. Assume that the free-fall acceleration is constant throughout and that the effects of the air can be ignored. What is the maximum height reached by the projectile?


At what time after being fired does the projectile reach this maximum height?

2007-12-14 03:02:28 · 3 answers · asked by Monty 1 in Physics

And, since that's the theory which explains parallel universes so well...does e=Mc2 now mean...energy = membranes x the speed of Light squared?

2007-12-14 03:00:03 · 8 answers · asked by Elysabeth 7 in Physics

I'm struggling with another problem from Rotman, namely:

If a group G has exactly two conjugacy classes, and at least one element of finite order, prove that it is isomorphic to the cyclic group of order 2.

Here's what I've got.

A. Let a be an element of order n. Then any other non-identity element is a conjugate of a, and hence has order dividing n.

B. By a very similar argument, all non-identity elements have the same order.

C. Obviously, that order must be a prime.

D. If that prime equals 2, the result is easy to prove as follows:

For any non-identity a and b, ab has order 2 (or 1). So abab = 1. So bab = a.

We just proved that all conjugates of a equal a. Since every non-identity element of G is by assumption a conjugate of a, we're done.

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So what am I missing?

2007-12-14 02:59:21 · 1 answers · asked by Curt Monash 7 in Mathematics

The altitude of a triangle are concurren. What is the name of their common pt?

2007-12-14 02:59:07 · 6 answers · asked by KASSIE101 2 in Mathematics

In her physics lab, Jessica rolls a 17-g marble down a ramp and off the table with a horizontal velocity of 1.04 m/s. The marble falls in a cup placed 0.52 m from the table's edge. Find the table's height. Use g = 10. m/s2. Enter m as unit

2007-12-14 02:56:13 · 2 answers · asked by Monty 1 in Physics

If comets really catch fire and get destroyed then why is it that we see them often? ( eg. halley's comet)

2007-12-14 02:54:37 · 12 answers · asked by Dia 5 in Astronomy & Space

At O degrees celcius a cannon fires a shell at 1324m/s.

a) how fast is the shell travelling relative to the sound wave from the explosion?
*b) how far away from the cannon is an observer who sees the shell pass by 2.00s before the sound of the explosion arrives?

2007-12-14 02:53:21 · 3 answers · asked by Anonymous in Physics

integral {2 to 10} of ( 1/ sqrt(x-1) )dx

2007-12-14 02:52:49 · 6 answers · asked by Lucy R 1 in Mathematics

I have tried the conjugate method and other things and still can't seem to find the answer...does anyone have any suggestions or answers!? THANKS!

2007-12-14 02:51:50 · 7 answers · asked by KDog1313 1 in Mathematics

Choose the ordered pair that is a solution to the system of equations.

-3x + y = -4
3x + y = -4

(-4, 0)
(4, 0)
(0, 4)
(0, -4)

2007-12-14 02:48:12 · 8 answers · asked by sstew15 3 in Mathematics