Science & Mathematics - 26 October 2007

2007-10-26 02:01:39 · 11 answers · asked by Anonymous in Astronomy & Space

Our oil is made up of fossil fuels from the dinosaurs. How many dinosaurs could their possible have been ever. Will this imaginary oil product last man kind forever. Neat trick.

2007-10-26 01:59:31 · 10 answers · asked by Jill S 5 in Earth Sciences & Geology

2007-10-26 01:55:51 · 6 answers · asked by Jansen J 4 in Astronomy & Space

We broke the atom... now it's quarks, will this ever end? or would we keep on breaking the constituents.

2007-10-26 01:55:19 · 1 answers · asked by BigG 2 in Physics

Honestly i have never know a nation so thick as the americans as to what a world map is and what countries are where.
For christ sake they actualy think europeans are some sort of nation.

2007-10-26 01:52:04 · 17 answers · asked by Jay 3 in Geography

Solve for the unknown parts and find its area
a= 23 b=43 c=31
(Find the three angles and the area)

2007-10-26 01:48:08 · 4 answers · asked by delixir_21 1 in Mathematics

I can't find it anywhere in my textbook section that I'm working on....and I can't find it on wikipedia either! Can anyone help?

2007-10-26 01:47:10 · 2 answers · asked by BrixxVida 2 in Botany

A flagpole is situated at the top of a building 120 ft tall from a point in the same horizontal plane as the base of the building, the angles of elevation of the top and bottom of the flagpole are 73.2 degrees and 67.2 degrees. Respectively how tall is the flagpole?

2007-10-26 01:40:05 · 5 answers · asked by delixir_21 1 in Mathematics

On a hill, inclined at 15.4 degrees with the horizontal, stands a vertical tower. At a point Q, 61.5 inches down the hill from the foot of the tower, the angle of elevation of the top of the tower is 42.6 degrees. How tall is the tower?

2007-10-26 01:37:24 · 2 answers · asked by delixir_21 1 in Mathematics

f is continuous on [0,4] and differentiable on (0,4). Also, suppose f(0) =1
and 3 a. 13 b. 3 c. 12 d. undefined

2007-10-26 01:25:34 · 2 answers · asked by programhelp 2 in Mathematics

2007-10-26 01:21:36 · 8 answers · asked by erkbergles 3 in Mathematics

2007-10-26 01:11:50 · 6 answers · asked by Anonymous in Mathematics

1. ( 2 x^5 / 3 x^3 ) ?

2007-10-26 01:10:24 · 4 answers · asked by dana c 1 in Mathematics

Mr Smith has a 3kW. water heater containing 120kg. of water initially as 20°C, and a clock radio which consumes 5W. No other appliances are using any electricity. There is 41p. of credit remaining on his electricity meter.

The alarm is set to sound after 8 hours, but if the meter runs out sooner than that then Mr Smith will oversleep.

What is the hottest temperature that his thermostat could be set to without running the electricity meter out of credit?

Specific Heat Capacity of water = 4200 J kg-1 K-1.
Price of electricity = 8p/kWh.
Assume the water heater is thermally insulated, and neglect its own heat capacity.

2007-10-26 00:58:35 · 1 answers · asked by sparky_dy 7 in Physics

4x^[2]y'' + 8xy' + y = 0, x > 0.

(a) Show {x^(-1/2), x^(-1/2)lnx} is a fundamental solution set for the differential equation.
(b) Solve the initial value problem with y(1) = 1, y'(1) = 0

2007-10-26 00:23:46 · 3 answers · asked by Anonymous in Mathematics

what are called molicular orbital is there any existance of this kind of orbital in chemistry.

2007-10-26 00:21:49 · 4 answers · asked by Anonymous in Physics

2007-10-26 00:19:42 · 5 answers · asked by klunk 3 in Astronomy & Space

The last three days coming to work, the moon was HUGE and yellow and on the horizon the other day (Central time around 5:45 a.m.). Then, on Thursday at around the same time it was almost white, much higher in the sky and seemingly further away, i.e. very much unlike Wednesdays 'moon'....Today it was even higher and seemingly farther away? I know it's full moon, but what gives to make it look totally different three straight days when the weather here has been virtually the same and the shift from fall to winter only happens in small increments? Anyone else notice it?????

2007-10-26 00:16:00 · 11 answers · asked by gato_del_sol_3 4 in Astronomy & Space

let matrix A=[ 1 1 ; 4 1]. (A 2x2 matrix with (1 1) in first row and (4 1) in the 2nd).
Diagonalize A by finding P and D such that A=PDP^-1.

Hence compute A^50.

Is it true that A^-1=(P)(D^-1)(P^-1)

please try to send me the final answers as well as the workings... thanks :)

2007-10-26 00:12:07 · 1 answers · asked by sh 1 in Mathematics

thank u for your help!

2007-10-26 00:05:34 · 6 answers · asked by Anonymous in Zoology