Science & Mathematics - 1 January 2007

It's on my globe but Triple A won't give me directions. But they told me people there walk on their hands and hamburgers eat people. I was lyke, totally awesome I have to go there!

2007-01-01 20:58:56 · 13 answers · asked by ? 1 in Geography

0 ⤊

simplify expression?

a
_____
a^2 - a

+

a
______
a^2 + a

I'm not sure if there's some formula that I'm supposed to use.

2007-01-01 20:56:45 · 5 answers · asked by Anonymous in Mathematics

3 ⤊

okay i know this is the stupidest question ever. but some people i know tend to beleive that it does exist. they are very serious on the subject and deeply beleive that it is possible to travel to anytime in the history or future.

i have tried explaining to them that it is not but they still are too hard headed to let go of their childish beleifs. so i am asking you smart people to intelligently explain to this said person why time travel is not possible. this person beleives deeply that you can go back in time and converse with dead people or go to things that no longer exist i.e buildings. and go to the future and see things yet to be created. i am just asking for a little help.

you if you could provide me with facts and statements that could explain and make even the most hard headed people realize it is not possible to travel in time.

and if you are a person who does beleive in time travel then please feel free to share with me your ideas on time travel.

2007-01-01 20:54:35 · 15 answers · asked by Anonymous in Physics

0 ⤊

Solve the system x^2+y^2=25 and x+2y=5, and another question...?

Please provide solutions for the above.

Another question:

A flagpole stands on top of a building. The angle of elevation of the foot of the pole 30m from the foot of the building is 60 degrees and 80m farther, the top of the pole has an elevation of 30 degrees. How high is the pole?

Please provide solutions. Someone answered (on the 2nd question), "Let H be the height of the building and h the height of the pole. The equations are

H= 30 tan 60 degrees
(H+h)=110 tan 30 degrees

I don't know anything about those. Please help and thank you.

2007-01-01 20:54:23 · 5 answers · asked by nandemonai 2 in Mathematics

1 ⤊

Math Problem?

A says to B. I am 5 times as old as you are when I was as old as you are now.Sum of their present ages is 64. Find present ages.

2007-01-01 20:53:48 · 4 answers · asked by Allie 1 in Mathematics

0 ⤊

Center of pressure?

An oil storage tank has one side sloping at 60 degrees to the horizontal. A circular opening of diameter 300mm is cut into the side of the tank and is covered by a plate bolted into place. The level of oil in the tank is 1.2m above the top of the opening find:
a)the force acting on the plate
b)the depth of the center if pressure for the plate below the surface of the oil

Oil has a density of 0.9
k value is D/4

I have my answer at 0.841 and 1.37 but believe this to be wrong and the correct answers are 0.83 KN and 1.33 metres.How do I do this correctly???

This isnt my homework....im just studying for an exam and using old questions with given answers so any help would be really appreciated

2007-01-01 20:51:13 · 2 answers · asked by Morfydd E 1 in Physics

2 ⤊

how do I simplify this fraction?

3x^3 +x^2 -2x
____________
9x^2 - 4

2007-01-01 20:50:50 · 5 answers · asked by Anonymous in Mathematics

0 ⤊

How does nervecells grow in number in the absece of cell division?

Is it a fact that nervecells do not multiply (cell division) ?Why?Then how do these cells (nerve cells )grow in numbetrs?

2007-01-01 20:47:26 · 1 answers · asked by Vaman 1 in Zoology

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Let E be a set which is not L-measurable,f(x)=x if x in E and f(x)=-x if x is not in E.Is f L-measurable?

2007-01-01 20:39:05 · 2 answers · asked by T D 1 in Mathematics

0 ⤊

f is real valued Lebesgue measurable function on real line then exists Borel measurable function g(x)=f(x)?

2007-01-01 20:30:45 · 2 answers · asked by T D 1 in Mathematics

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if you were in space...............?

if you were in space going the speed of light, then turned on head lights on the front of your craft. would the light still project outward, or would you never see the lights turn on?

2007-01-01 20:29:32 · 14 answers · asked by monkeyfingerslap 2 in Physics

2 ⤊

can electrons be removed from noble gases?

i think they can be removed but if so which noble gas requires the most energy to remove electrons?

2007-01-01 20:27:40 · 5 answers · asked by Anonymous in Chemistry

1 ⤊

solving an equation?

1
____
x + 2

+

2
____
x-2

=

1
____
x^2 + 4

2007-01-01 20:20:49 · 3 answers · asked by Anonymous in Mathematics

0 ⤊

Persian golf?

2007-01-01 20:17:55 · 5 answers · asked by sky71 1 in Geography

1 ⤊

use 22/7(pi) in plane and solid geometry ?

plz mention the role of pi in plane and solid geometry

2007-01-01 20:16:53 · 4 answers · asked by harry potter 1 in Mathematics

0 ⤊

What factors influence gametogenesis?

(This is not homework...)
I think it's probably hormones, temperature, drugs, etc. But I don't know the details. Can anybody help me?

2007-01-01 20:16:14 · 4 answers · asked by Anonymous in Biology

2 ⤊

what is the area of quadrilateral ABCD whose all the four sides are given?

1) AB= 85.41 feet, BC= 80.33 feet, CD= 86.25 feet, DA= 90.92 feet
2) AB= 85.41 feet, BC= 53.33 feet, CD= 86.19 feet, DA= 63.92 feet
3) AB= 42.71 feet, BC= 58.64 feet, CD= 43.08 feet, DA= 63.92 feet

2007-01-01 20:14:49 · 3 answers · asked by Anonymous in Mathematics

1 ⤊

With the earth surrounded by huge oceans....?

Do you still believe that The earth is round???

2007-01-01 20:13:58 · 12 answers · asked by Anonymous in Geography

4 ⤊

How do you work out square roots?

2007-01-01 20:11:13 · 15 answers · asked by Anonymous in Mathematics

1 ⤊

Consider god is real.?

Does god make things moraly right or wrong so they are right or wrong or does he simply command right and wrong because they are inheriantly right or wrong?

2007-01-01 19:56:26 · 8 answers · asked by Anonymous in Geography

0 ⤊

calculus question?

find the max and min values of this funtion by taking the derivaive and set it equal to zero plz tell me in detail .i got in stuck in some step. f(x)=-1/8 (x+5) (x+4) (x+3) (x+2)

2007-01-01 19:42:15 · 5 answers · asked by unnamed 1 in Mathematics

0 ⤊

Why is the earth brown from space?

2007-01-01 19:40:28 · 17 answers · asked by Anonymous in Geography

0 ⤊

If traveling at the speed of light, you turn on head lights, how fast do the lights from the head lights go?

I heard that light can't travel faster than the spead of light. But its intersting to me that You can have a fly in your car on your dash board going 70 miles an hour then it can fly around in the air in your car at its normal speed. In fact the fly is traveling at 70 miles per hour plus its normal flight. If i stood on a car going at 70 miles per hour and applied enough energy and ran off the car or jumped or what ever I would be traveling at 70 plus the speed I was going to get off the car. Light is not outside of these rules however we are told light is constant. I don't believe that. of course we can't prove this as it is but I think that The light would be traveling then at 2 times the speed of light. it only makes sense to me. of course i do not have a degree in physics. If your behind an object moving at the same speed of light about 10 feet in front of you, would the lights light up on the object?

2007-01-01 19:37:08 · 16 answers · asked by qcdon30 2 in Physics

1 ⤊

word problem?

members of the International Club were to share te $840 cost of a field trip. With 7 members canceld, the cost per member was $4 more.

A.) write an equation to answer this question: How much did each member finally pay for the field trip? Use x to represent the original cost of the trip per member.

B.) Solve the equation and write the answer to the question.

2007-01-01 19:36:05 · 4 answers · asked by Anonymous in Mathematics

1 ⤊

Why does it say "Do not shake" on the side of a Sharpee Marker?

2007-01-01 19:34:59 · 3 answers · asked by ♥Skippy♥ 3 in Other - Science