Science & Mathematics - 9 January 2007

How do you know if a matricie has an inverse or not....???

2007-01-09 13:37:28 · 3 answers · asked by Anonymous in Mathematics

is an illustration of what?

a. activation energy
b. the law of conservation of energy
c. the law of conservation of mass
d. a double replacement reaction

2007-01-09 13:37:16 · 3 answers · asked by Anonymous in Chemistry

2007-01-09 13:37:12 · 8 answers · asked by princessjanie3 1 in Mathematics

And are there any good websites to describe it better than wikipedia does?

2007-01-09 13:36:56 · 4 answers · asked by mercury21813 3 in Mathematics

Explain how momentum might be used to determine the point where an aircraft exploded or a collision between aircraft occurred.

Please help me with this question.
I'm having trouble understanding it.

2007-01-09 13:36:21 · 1 answers · asked by swimmertommy 1 in Physics

2007-01-09 13:36:15 · 6 answers · asked by tweetyman7 1 in Mathematics

Maybe it depends on the size of the opening.

2007-01-09 13:34:56 · 2 answers · asked by amateur_mathemagician 2 in Physics

I'm pretty sure that both professions are pretty closely related... but I'm not sure to what extent...
HELP!!!

2007-01-09 13:34:40 · 8 answers · asked by Vlmdr Ishkomvarakom 2 in Medicine

Using the standard form of the a quadratic equation, ax^2+bx+c, show that solving it for x, when f(x)=0, by completing the square is equivalent to using the quadratic equation.

2007-01-09 13:34:18 · 4 answers · asked by bball3910 1 in Mathematics

create a collection of 16 numbers that could be represented by the box-and-whisker plot.
1)median=19
upper quart=27
lower quart=13
min =10
max=38

2)median=150
upper quart=162
lower quart=124
min=106
max=193

thanks

2007-01-09 13:33:39 · 1 answers · asked by NABEELiOS 1 in Mathematics

A parabola is defined by (x-57)^2=-3y+288. How do I find the absolute value of the y-intercept of the parabola?

2007-01-09 13:31:58 · 2 answers · asked by Anonymous in Mathematics

this is the last one, i promise!

i need to find the value of 15degrees tan

2007-01-09 13:31:48 · 1 answers · asked by idk 1 in Mathematics

plate tectonics in india move 15 cm/year. formations occurred during the last 1.00 x 10 to the 7th power. then india's formation slowed to about 5 cm/year. what is the acceleration in cm/year squared during this time period?

2007-01-09 13:31:02 · 1 answers · asked by Navy SEAL - 42 2 in Physics

what do they show us? how do we describe the number that we get from it?

2007-01-09 13:30:41 · 2 answers · asked by M.K 2 in Mathematics

i just want to see the possiblities of what could have happened

2007-01-09 13:27:28 · 8 answers · asked by Anonymous in Other - Science

2007-01-09 13:26:22 · 1 answers · asked by eddienel 1 in Botany

and how can I get to portland ? plane or high way?

2007-01-09 13:25:29 · 4 answers · asked by novalian 1 in Geography

2007-01-09 13:25:04 · 4 answers · asked by lc l 1 in Mathematics

2007-01-09 13:24:48 · 2 answers · asked by chingchang 1 in Chemistry

a- They're are removed through the process of respiration
b- They're filtered through the kidneys

2007-01-09 13:24:48 · 4 answers · asked by Becky 2 in Biology

Is it possible to graph 3 < -1 on a number line?

2007-01-09 13:22:31 · 4 answers · asked by theapocalypseisnow91 2 in Mathematics

2007-01-09 13:20:50 · 4 answers · asked by :DsMiLe 2 in Earth Sciences & Geology

2007-01-09 13:19:21 · 4 answers · asked by scantu77 1 in Astronomy & Space

2007-01-09 13:19:06 · 3 answers · asked by Anonymous in Geography

2007-01-09 13:19:03 · 5 answers · asked by Anonymous in Mathematics

2007-01-09 13:18:49 · 6 answers · asked by Unique 1 in Weather

My daughter is doing a science experiment. She placed a can of each in the freezer, and the diet exploded first. We are trying to determine why the diet exploded before the regular.

2007-01-09 13:18:42 · 4 answers · asked by Dan R 1 in Other - Science

2007-01-09 13:18:38 · 15 answers · asked by ? 5 in Astronomy & Space

2007-01-09 13:14:29 · 4 answers · asked by mahmoud 1 in Medicine

2007-01-09 13:13:53 · 5 answers · asked by Anonymous in Mathematics