Science & Mathematics - 24 October 2006

A projectile is shot from the edge of a cliff h = 245 m above ground level with an initial speed of v0 = 145 m/s at an angle of 37.0° with the horizontal, as shown in Fig. 3-39.
(a) Determine the time taken by the projectile to hit point P at ground level.
s
(b) Determine the range X of the projectile as measured from the base of the cliff.
km
(c) At the instant just before the projectile hits point P, find the horizontal and the vertical components of its velocity (take up and to the right as positive directions).
I got 115.8 m/s (horizontal component)
I got 87.26 m/s (vertical component)-is this right?
(d) What is the the magnitude of the velocity?
m/s
(e) What is the angle made by the velocity vector with the horizontal?
° (below the horizontal)


I don't get any of this. I don't know what they mean by range. Is magnitude the same as velosity?I don't understand what they are asking me to do.

2006-10-24 15:11:28 · 4 answers · asked by beast 1 in Engineering

2006-10-24 15:10:57 · 2 answers · asked by sueprescott724 1 in Mathematics

here it is A new element has been discovered on planet Q-Blutonium.this planet is quite dense(47 g/cm squared) and very rare .It is worth 94.5 million dollars a gram.It cost the local labratory 2.2 million dollars to purchase a sample of the new element.What was the volume of the piece of Blutonium the lab purchased? Round your answer to the neareast ten-thousand of a cm squared (hint: volume = mass/density


THANKS SO MUCH FOR ANYONE THAT CAN DO IT

2006-10-24 15:10:43 · 3 answers · asked by Mike 2 in Mathematics

They have removed the footage from youtube, but this movie showed camera footage looking at our galaxy and other galaxies from a distance away from earth. 100million light years away, then moving closer and going inside a persons cells to x -17. How do they do this when it is past the distance of any satellite and camera footage would be looking from earth which is the opposite direction?

there is a simpsons version available but is nowhere as good as the real thing. http://www.youtube.com/watch?v=yCfDRvDWid0

2006-10-24 15:08:47 · 2 answers · asked by Anonymous in Astronomy & Space

2006-10-24 15:08:32 · 4 answers · asked by Water GUY 1 in Engineering

Iodine and Bromine react to give Ibr

I2 + Br2 <---------> 2IBr

What is the equilibrium composition of a mixture that initially contained .0015 mol each of iodine and bromine in a 5.0 L vessel. K=1.2 x 10*2

I and Br=.0003 mol

[2x]*2
[.0003-x]*2 = 120

Square root that….
2x/.0003-x = 10.95

Solve for x= 3.67 x 10*4

The correct answer is

I and Br at equil = 4.7 x 10*-5

What did I Miss the boat on? I know its hard to try to understand my work on this thing but please help.

2006-10-24 15:07:12 · 3 answers · asked by cassandracorrao 3 in Chemistry

and how do you recognize the molecular shape by looking at the lewis structure. and how do you recognize the where the net dipole exists?

2006-10-24 14:59:48 · 7 answers · asked by Anonymous in Chemistry

It is red about 2 inches long. i found it in the shower. it's alive. it looks like a worm. i found two of them.they were red with black half way to the bottom. the black stuff looks like bugs in them. they freak me out.

2006-10-24 14:59:13 · 9 answers · asked by Lenale 3 in Biology

i want to know how i can do this please show me step by step

2006-10-24 14:56:05 · 16 answers · asked by Anonymous in Mathematics

There are about 6 billion people alive today. Almost all will be dead in 100 years, from natural or other causes. Many who won't be born for another 30-50 years could also be dead by 2106 from any number of natural conditions (cancer, heart, stroke etc). The number is obviously greater than 6 billion, but how much more? Double? Triple? That's a lot of graves.

2006-10-24 14:53:29 · 9 answers · asked by Anonymous in Medicine

Lol I'm so desperate I even scanned the diagram from my textbook T_T

Here's the link to the diagram: http://i5.photobucket.com/albums/y151/susu_atari/problemnumber13.jpg

The question is: what's the measure of angle ABC?

Well, I figured out that x=3.

But what's the measure of angle ABC?!?!

Oh, and can you tell me how you solved the problem?

Thanks T_T

2006-10-24 14:49:56 · 5 answers · asked by 2 days after my B day :) 2 in Mathematics

i need a qoute to put on a history page of the yearbook and i need some ideas, its a christian school so please keep em clean

2006-10-24 14:46:57 · 11 answers · asked by unknown 1 in Other - Science

What if the Atlantis was a planet that the pharaohs knew about and use to worship as the responsible of life on our planet , they had these astronauts uniforms as a symbol of belonging to another planet . Did they know about the secrets of life and about the true Atlantis which another culture that preceded them informed them about and were the true builders of the pyramids ?

2006-10-24 14:45:42 · 6 answers · asked by fuschiafish 2 in Astronomy & Space

I can't seem to find specific groups for a project, please help...

2006-10-24 14:44:50 · 5 answers · asked by DeAnna 5 in Medicine

2006-10-24 14:43:03 · 3 answers · asked by jj 2 in Earth Sciences & Geology

(See photo)
http://www.hightechscience.org/Buran_Space_Shuttle_Comparsion_1.gif

2006-10-24 14:42:26 · 7 answers · asked by CLBH 3 in Astronomy & Space

I'm just curious, 'cause I seem to get canker sores a LOT for no resaon, and I think maybe my saliva is a little more acidic than normal. I just want to compare my saliva's Ph to normal (I'm probably going to do some type of litmus test, I think, I'm not quite sure, but I'll know when I see it, lol!)

2006-10-24 14:42:20 · 6 answers · asked by T.J. 2 in Chemistry

I'm re-asking a q. I tried to ask weeks ago, only people answered before I could finish putting in all the details, and obviously had no idea of wha i was really asking. Okay, bear w' me.

I want to draw an analogy. The story is told of an elderly lady who attended a lecture on cosmology. Afterward, she told the lecturere that she didn't believe the Earth was a sphere, or that it floated in space.

"What do you believe?" he asked.

"The Earth is circular but flat,"she replied. "And it's not floating in space."

"What holds it up, then...?" he wanted to know.

It's resting on the back of a gigantic elephant!"

"What holds the elephant up?"

"It's standing on the back of an enormous turtle!"

"But what holds the turtle up?"

"It's standing on the back of an even more enormous turtle!"

"And where is that turtle standing...?"

"It's no use," she said with a smile. "It's turtles, all the way down!"

2006-10-24 14:42:13 · 8 answers · asked by cdf-rom 7 in Astronomy & Space

that there is a far more advanced alien civilization than ours and that earth is just one of its little experiments? a million years to us would just be an hour to them?

2006-10-24 14:41:44 · 13 answers · asked by budi 2 in Astronomy & Space

2006-10-24 14:41:17 · 9 answers · asked by gloria g 1 in Mathematics

How much more can it take? Is there a limit on the amount of weight we can add to this planet?

2006-10-24 14:39:58 · 9 answers · asked by SHACHA 2 in Astronomy & Space

its 2 am...im frustrated i need to describe the calvin cycle in photosynthesis, please help!! just give me a brief simple description....thanks

2006-10-24 14:39:20 · 2 answers · asked by Anonymous in Biology

Hi
I am trying to derive tan(a+b)
I have done:
tan(a+b)=sin(a+b)/cos(a+b)=sinAcosB+cosAsinB / cosAcosB-sinAsinB
can someone tell me where to go next?

Thanks!

2006-10-24 14:38:59 · 4 answers · asked by Anonymous in Mathematics

in sesame plants the one pod condition (P) is dominant to the three pod condition (p) and normal leaf (L) is dominant to wrinkled leaf (l)

these traits are inheirted independently

determine the genotypes of the two parents for all possible matings producing the following off spring

a) 318 one pod normal
98 one pod wrinkled

b) 323 three pod normal
106 three pod wrinkled

c) 401 one pod normal

d) 150 one pod normal

147 pod wrinkled

51 three pod normal

48 three pod wrinkled

i really dont understand how to do this... please help!

2006-10-24 14:38:11 · 3 answers · asked by A 6 in Biology

2006-10-24 14:38:10 · 7 answers · asked by Kylee 1 in Astronomy & Space

the following links show what I believe to be (NOT A CITY) but a dam, that was constructed by a civilization in need of water in the interior of the planet. if this feature (staple shaped at the edge of the ice cap) is merely natural, then why was it tampered with, as to make it look like alluvial flow? i added pics (links) to support this.

http://www.lpi.usra.edu/research/msp/msp2.jpg
http://nssdc.gsfc.nasa.gov/image/planetary/mars/mars_so_pole.jpg
http://www.solarviews.com/raw/mars/southpol.jpg

the following links reveal an attempt to touch up the staple shaped anomaly on the south pole of Mars:

http://ph.groups.yahoo.com/group/ASIANS-FROM-EGYPT/photos/view/810c?b=16&m=f&o=0

note: the circled area refers to a square feature in a dry lake bed. the area in question is the staple shaped "smear" next to it.

http://ph.groups.yahoo.com/group/ASIANS-FROM-EGYPT/photos/view/810c?b=17&m=f&o=0

http://ph.groups.yahoo.com/group/ASIANS-FROM-EGYPT/photos/view/810c?b=18&m=f&o=0

2006-10-24 14:37:22 · 7 answers · asked by M 2 in Astronomy & Space

the university i'm planning to go to only offers Zoology as a biomedical science. I want to major in Biochemistry which gives me a Bachelor of Science in Biochemistry, but it didn't say it was a biomedical science. Would it be better to major in biochm or zoology if i want to go to med school?

2006-10-24 14:35:52 · 8 answers · asked by blue_bee 4 in Chemistry

m/s^2 means? I mean like what does it mean besides acceleration? What does the squared essentially mean?

2006-10-24 14:32:48 · 8 answers · asked by Anonymous in Physics

relating to Newton's laws on forces

2006-10-24 14:32:28 · 2 answers · asked by ^_^' 2 in Physics

Hippopotami, despite their heavy weight, are not tall animals. In the wild, there are often well enought concealed by vegetation to remain unseen until one is within very close proximity of the creature. Hippos are highly territiorial and can outrun and out-distance all but the fastest of human athletes. In the event of a hippo attack, unless one is very close to sturdy shelter, the best hope for survival is to successfully kill the animal. This is for a research project and is an entirely academic exercise. Thanks in advance for your help.

2006-10-24 14:31:46 · 8 answers · asked by GreasyMadness 3 in Biology