Science & Mathematics - 12 October 2006

I can understand when I see the answers... but my teacher has a hard time explaining what he is trying to teach.... I am so confused!
If nobody can help... THATS COOL I UNDERSTAND:)

2006-10-12 19:27:39 · 4 answers · asked by pmgstudios 1 in Mathematics

Ok. Any ultrasound gurus out there. This Q is out of my realm. I am looking at a pipe weld with a solid cap that has a penetration of 1 mm in dept in the parent metal. I'm using a UT tester that is checking the lack of pen. The block that has a transducer in it that I'm using is perp. to the weld. How is the UT transducer looking at the joint ? Is it sounding at a Vert. or Hort.or cone, type picture, all I have is what we call a gate, If I see a spike thru the gate I have a flaw. I understand the theory of sound and echos. I have seen some surface features that has caused some false spikes or voids

2006-10-12 19:24:17 · 2 answers · asked by Anonymous in Engineering

Here's the question:
assume x^2+3x+2=0
this factors to
(x+2)(x+1)=0

Now divide both sides by
(x+2)(X+1),
and you get

((x+2)(X+1))/((x+2)(X+1))=0/((x+2)(X+1))
For the left side, you get (x+2)(X+1) over itself, which is one, while for the right, since you are dividing 0, you get zero. This leaves you with:
1=0, which is obviously not right, where is the mistake in this problem?

2006-10-12 19:23:09 · 7 answers · asked by aglon314 2 in Mathematics

Like aluminum cans, they could put a 4 cent redemption on butts. Woldn't that avoid a lot of litter?

2006-10-12 19:22:51 · 6 answers · asked by craig p 2 in Medicine

Pluto was voted by the scientists that it is no longer a planet. It seems peculiar to me because it has been a planet since approxiamately 1936, and what is the big deal? Why did they go to so much trouble over this? Does anyone know? Would you care to explain it to me?

2006-10-12 19:19:23 · 6 answers · asked by Anonymous in Medicine

Factor each polynomial

b^2 + 5b – 24

v^2 – 22v – 75

2006-10-12 19:18:21 · 6 answers · asked by Anonymous in Mathematics

2006-10-12 19:14:41 · 8 answers · asked by bullrunjimbo 1 in Geography

2006-10-12 19:05:45 · 8 answers · asked by Anderson 1 in Engineering

Solve the following equation for the unknown: 7x - 3 = 18

Graph the following equations; calculate the slope, x-intercept, and y-intercept, and label the intercepts on the graph.

3. y = x + 3

4. y = -2x - 7

5. (5 points) 2x + 3y = 9

6. (5 points)
A consumer electronics company sells 6.7 million MP3 players per month at a price of $100 apiece; when the price is lowered to $80, the company sells 10.2 million players per month. How many MP3 players can the company expect to sell per month at a price of $75?

7. (3 points)
The points (1,5), (4,5), and (1,0) represent three corners of a rectangle; find the coordinates of the fourth point.

8. (5 points)
Seven inches are equivalent to 17.78 cm. Find the equation converting length in cm to length in inches. What is the length in inches of a 96.2 cm bar?

9. (4 points)
Find an equation in slope-intercept form passing through the points (2,5) and (7,-3).

10. Sales tax in Pennsylvania is 6%. Create an equation for the total

2006-10-12 19:01:55 · 9 answers · asked by pmgstudios 1 in Mathematics

Factor each polynomial completely
2a2 – 4a – 2

t2 – 9w2

Completely?

2006-10-12 18:58:58 · 4 answers · asked by Anonymous in Mathematics

2006-10-12 18:56:51 · 3 answers · asked by vishal g 1 in Earth Sciences & Geology

2006-10-12 18:51:04 · 10 answers · asked by mo-z 3 in Biology

2006-10-12 18:47:52 · 5 answers · asked by Anonymous in Medicine

is the liimiting reactant always the reactant in the smallest number of moles?

2006-10-12 18:44:34 · 4 answers · asked by Anonymous in Chemistry

The politicians who passed it like to say it's a 1% increase.
Is it?

2006-10-12 18:42:01 · 3 answers · asked by Anonymous in Mathematics

For instance, why can a human choose to hold its hand in a fire when it knows that the fire will burn it and an ape can't. Why can a human choose to not drink water or eat food until it dies and other creatures can't? A human seems to be able to control the energy in its brain while the energy in other animals' brains seems to only react to stimuli. What is the physical difference that causes this?

2006-10-12 18:40:27 · 4 answers · asked by Anonymous in Biology

2006-10-12 18:33:24 · 4 answers · asked by newyorktocountry 2 in Biology

its about linear equation of algebra subject

2006-10-12 18:27:00 · 4 answers · asked by mayumi 1 in Mathematics

I've read that it was attempted quite a few times during the cold war, and on into the 80s, then they stopped because of too many unsuccessful tries. Some scientists claimed to get at least 60% of their energy returned using only room temperature heat, so apparently the idea EXISTS, and it has the potential to be created...and with the big issue of losing oil as a natural resource, why not try it again?

2006-10-12 18:24:34 · 5 answers · asked by Dennis 6 in Earth Sciences & Geology

i need to know of a substance that i can put in a white detergent power that will not be visable....im tying to mess up someones clothes on the under. or if not any good ideas for payback.?? serious answers plz.

2006-10-12 18:20:02 · 10 answers · asked by pisces_dreamer06 2 in Other - Science

2006-10-12 18:19:34 · 13 answers · asked by newyorktocountry 2 in Mathematics

Can you give common examples of deposition. the change of matter from gas(vapor) to solid. Pls. answer! Thnk yoU!

2006-10-12 18:18:48 · 5 answers · asked by John^Lorenz^Naz^Cutie! 3 in Biology

2006-10-12 18:12:28 · 9 answers · asked by tom science 4 in Astronomy & Space

2006-10-12 18:12:14 · 4 answers · asked by poilatezonka 1 in Biology

2006-10-12 18:11:34 · 6 answers · asked by Marian C 1 in Biology

2006-10-12 18:08:09 · 3 answers · asked by raghu n 1 in Engineering

Well, the most acceptable is the rotation of the blade.
Table fan -- Clockwise. Ceiling fan -- anticlockwise.

2006-10-12 18:07:17 · 10 answers · asked by Anonymous in Engineering

the guitar must be between 1/2 and 3/4 of the size of a full guitar
find and list in from least to greatest ,four fractions in that range express the fractions in lowest terms

2006-10-12 18:05:27 · 5 answers · asked by Jen 1 in Mathematics

2006-10-12 18:03:15 · 9 answers · asked by the old dog 7 in Engineering

2006-10-12 17:51:52 · 11 answers · asked by s t 2 in Mathematics