Science & Mathematics - 30 September 2006

2006-09-30 13:44:55 · 15 answers · asked by teddybear 3 in Astronomy & Space

2006-09-30 13:44:15 · 4 answers · asked by Scooter 1 in Engineering

A rocket is rising vertically according to the position equation s = 60t^2. If a camera 4000ft away is filming the launch, find the rate of change of the angle of elevation after 3 seconds. Use radians.

2006-09-30 13:42:12 · 5 answers · asked by Taryn 2 in Mathematics

I don't no how to race to power so i wrote some in words. But i need help. I don't know how to sovle it. The method i was taught is very confusing can someone show me like two diffent methods how to sovle this complex expression
(3x+1) power 2 - (x-3) power 2

2006-09-30 13:40:06 · 12 answers · asked by Agentj100 4 in Mathematics

2006-09-30 13:38:47 · 4 answers · asked by chode b 2 in Biology

2006-09-30 13:36:53 · 11 answers · asked by silksatincrazy 1 in Weather

A force of 100N, acting over a distance of 10 m, increases the kinetic energy of a moving object by 500J. This information is sufficient to conclude that

a.) the object was accelerated.

b.) there was friction present.

c.) the potential energy changed.

d.) all of the above.

2006-09-30 13:35:27 · 2 answers · asked by Anonymous in Physics

2006-09-30 13:34:15 · 3 answers · asked by karen l 1 in Medicine

A skydiver whose parachute is fully deployed is descending at constant speed. Describe what is happening to her kinetic energy, her potential energy, and her total mechanical energy as she falls. Is any work being done? If yes, where does it go?

2006-09-30 13:34:01 · 2 answers · asked by Anonymous in Physics

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2006-09-30 13:33:22 · 8 answers · asked by Anonymous in Mathematics

2006-09-30 13:30:24 · 7 answers · asked by what_is_the_first_cause 2 in Physics

The goal is to solve for "a". Help, please?

2006-09-30 13:28:37 · 7 answers · asked by Irritated with Algebra 1 in Mathematics

Does liquid hydrogen spontaneously combust?

2006-09-30 13:27:50 · 8 answers · asked by mikeyslsk 1 in Chemistry

After you take a soda(cold) out of the fridge, and pour it on a glass.After 10-15 minutes,move the cup, how dose that water get out??????

2006-09-30 13:26:51 · 8 answers · asked by Julio M 3 in Physics

I fyou happen to know anythinga bout much energy is required to vaporize any amount of steel, please let me know. If you don't, please don't answer.

2006-09-30 13:26:19 · 2 answers · asked by Anonymous in Physics

2006-09-30 13:20:29 · 3 answers · asked by maria 1 in Astronomy & Space

I am very confused on this why dont you do these problems the same way?

3a-6=a+4
3a-6+6=a+4+6
3a=a+10
3a-a=a+10-a
2a=10
2 2
a=5
7x-14=9x-6
7x-14-9x=9x-6-9x
-2x-14=-6
-2x-14+14=-6+14
-2x=8
-2 -2
x=-4
ok, notice how you add first in the first example and then subtract. Now notice how you subtract first and then add in the second example.
Now if I follow the way they did it in the second example for this problem
2x+7=6x-1
I get the wrong answer
2x+7=6x-1
8x+7=-1
-7 -7
8x=-8

Now if I use the second example I get
2x+7=6x-1
-4x+7=-1
+7 +7
-4x 6
Notice again I get the wrong answer. So can someone please explain to me how do you decide when to add and when to subtract or can someone tell me where I go wrong tih these problems because they are honestly making no sense to me at all.

2006-09-30 13:14:15 · 10 answers · asked by The Chief 2 in Mathematics

The left cable is horizontal. The right hand cable is attached at a 40 degree angle. For example if it were in a doorframe, the left cable would be attached to the side of the doorframe, and the right cable would be attached to the top of the door frame at a 40 degree angle, with the weight hanging where they meet.

What is the tension in the cable slanted at a 40 degree angle? Answer in N

What is the tension in the horizontal cable? Answer in N

2006-09-30 13:11:24 · 2 answers · asked by Dee 4 in Physics

Hafnium has a higher melting point than platinum I already have two diamonds 3.5mm and a nice alexandrite center stone 8x6 and a small block of Hafnium metal just need someone with the skills nad knowhow to fabricate the thing

2006-09-30 13:07:59 · 6 answers · asked by wisecrack 2 in Earth Sciences & Geology

I also have a drop of 10 feet. Will this power an 12 volt alt for a small power supply?

2006-09-30 12:59:52 · 2 answers · asked by Richard L 1 in Engineering

2006-09-30 12:59:11 · 6 answers · asked by Anonymous in Other - Science

2006-09-30 12:58:04 · 13 answers · asked by Anonymous in Zoology

isn't carbon dioxide just plant food?

2006-09-30 12:56:58 · 16 answers · asked by pinhed_1976 6 in Other - Science

vitamins, studies

2006-09-30 12:53:19 · 6 answers · asked by couragetostand 2 in Medicine

2006-09-30 12:51:13 · 11 answers · asked by Anonymous in Geography

isn't everything that's created on the earth, using products from the earth, natural?

2006-09-30 12:48:22 · 7 answers · asked by pinhed_1976 6 in Other - Science

2006-09-30 12:43:47 · 11 answers · asked by Dot 1 in Other - Science

2006-09-30 12:43:33 · 6 answers · asked by cubkumar 1 in Zoology

Mark can paint a wall in 5 hrs. Jim can paint the same wall in 3 hrs. How long would it take them to paint the wall if they worked together?

please include the answer and the way u found it. thanks!

2006-09-30 12:41:58 · 7 answers · asked by Stevie471 1 in Mathematics

x to the power of 4, divide four.

ie (x^4)/4

It's a very simple problem if you draw it on paper, but I can't for the life of me... Anyway, little help please?

2006-09-30 12:40:39 · 2 answers · asked by Link 4 in Mathematics