Science & Mathematics - 29 November 2007

2007-11-29 01:35:53 · 5 answers · asked by hassan a 1 in Geography

A stone is thrown at an angle of 30.0° above the horizontal from the top edge of a cliff with an initial speed of 12 m/s. A stopwatch measures the stone’s trajectory time from the top of the cliff to the bottom at 5.60 s. What is the height of the cliff? (Assume no air resistance and that a ^y= -g = -9.81 m/s^2.)

2007-11-29 01:34:00 · 1 answers · asked by Anonymous in Physics

Compute how much IV fluid you would document on an I&O form as being absrobed from a 1000 ml bag if the following amounts are left in the bag.
They are
275 ml
550ml

2007-11-29 01:32:10 · 3 answers · asked by whisper2ya 2 in Medicine

I understand that nano flower is the flower created by nano technology in the lab,am I right?

2007-11-29 01:27:05 · 2 answers · asked by Thimmappa M.S. 7 in Botany

2007-11-29 01:26:07 · 8 answers · asked by Anonymous in Zoology

why on most of batteries it's written that no mercurey is added?what are the harms of adding mercurey?does it increase the batteries life?

2007-11-29 01:20:56 · 3 answers · asked by Abdullah 2 in Chemistry

How many volts does the average piezo lighter emmit? I heard it was in the neighborhood of appox. 10,000 volts.

2007-11-29 01:16:24 · 1 answers · asked by Howard N 1 in Engineering

Maybe they're made of other stuff than just gas, solid and liquid. Maybe they're not organic at all but still living in a sense we don't know yet. I'm guessing we -as in mankind- are not even aware to what "Life" means to a full extend. So maybe do you think other pyshical conditions are possible in this universe, or maybe in another one?

2007-11-29 01:10:48 · 16 answers · asked by Ghost of Rasputin 2 in Astronomy & Space

2007-11-29 01:05:43 · 1 answers · asked by Anonymous in Geography

http://www.aa2sbu.org/MoonSunJoyDutta.jpg

I see this in the sky all the time.

According to the way the moon is lit up, surely the sun should be 'above' the moon in the sky from the point of view of the camera?

How can the lit-up part of the moon 'face' away from the sun in the sky sometimes?

2007-11-29 01:00:18 · 14 answers · asked by Gabriel H 3 in Astronomy & Space

i mean forces acting on the rock

2007-11-29 00:59:10 · 8 answers · asked by Anonymous in Physics

What if, due to some electromagnetic interference, the earth's rotation decreased? It is obvious that there would be more hours in the day, but I always assumed that there is a certain amount of centrifugal force that affects gravity. It the earth's rotation decreased, then there would be less centrifugal force, which means gravity would increase, right? How weird would that be? How would we adapt to the increased weight? Would the affect be so dramatic that it could kill any of us?

2007-11-29 00:58:54 · 12 answers · asked by Tominator 2 in Astronomy & Space

2007-11-29 00:53:49 · 5 answers · asked by Anonymous in Physics

To become an effective participating nation in a venture to reduce global warming what should be the role and action plan
India should come forward with?

2007-11-29 00:52:34 · 4 answers · asked by Anonymous in Earth Sciences & Geology

2007-11-29 00:45:20 · 6 answers · asked by Anonymous in Geography

2007-11-29 00:40:24 · 4 answers · asked by Anonymous in Geography

Two people, Ali and Bali, are at the bottom floor and they start climbing the stairs at the same time. Ali climbs two times as fast as Bali. If Bali reaches the fifth storey, where is Ali now?

The answer is 5x2-1=9 but I don't understand it. I thought it is 10??

2007-11-29 00:39:10 · 11 answers · asked by lol 1 in Mathematics

I'm specifically looking for which gland produces the hormones that we feel as emotion. please give me references, this is for a report.

2007-11-29 00:33:32 · 8 answers · asked by dracogemini16 2 in Biology

why some countries are known as gulf country?

2007-11-29 00:18:26 · 5 answers · asked by Anonymous in Geography

Let G be a group and let a be one fixed element of G. Show that Hₐ = {x ϵ G = lxa = ax}

2007-11-29 00:14:30 · 1 answers · asked by Anonymous in Mathematics

A hot air balloon is 80 m above the ground and travelling vertically downards at 8.0 m/s when one of the passengers accidently drops a coin over the side. How long after the coin reaches the ground does the balloon touch down?


Ok so i assume ur supposed to find the landing times of both. So for the hot air balloon, since it's travelling at 8m/s and there's 80 metres to go, it'll take 10 seconds to reach ground. Is that right?

Then for the coin i can't figure out how to get the time. Which equation of motion do you use?
u = 8m/s
x = 80 or is it -80?
a = 9.8m/s^2

do you use x = ut + .5at^2? That's the only equation with all the values that I have but then you'd have to work out 't' as a quadratic equation.

I dunno maybe i'm getting the theory wrong and just not understanding this topic.

Any ideas on how to do it?


Thanks!!

2007-11-29 00:11:29 · 5 answers · asked by Anonymous in Physics