Science & Mathematics - 19 December 2007

Question: a cannon sends a projectile towards a target a distance 1350m away. The initial velocity makes an angle of 27 degrees with the horizontal. The target is hit.
The acceleration of gravity is 9.8m/s^2. What is the magnitude of the initial velocity?


I've attmpted this problem like 50 times, but I really don't see how I can get the initial velocity without being given one of the components or something...any ideas?

2007-12-19 12:13:50 · 2 answers · asked by Jackie 1 in Physics

when your doing radicals, the outside number, can you add and multiply to that number?? (i.e) 9*RADICAL*5 times 35 plus 8.

Can you times the 35 and add the 8 onto the 9?

2007-12-19 12:13:04 · 1 answers · asked by libbay 2 in Mathematics

1)
XXX.
2)
XO.
3)
XYY.
4)
XXY.
5)
none of these

I am stuck on a practice quiz. Please help if you can, thanks!

2007-12-19 12:10:08 · 2 answers · asked by daitheflu99 2 in Biology

square, rectangle, triangle, sphere, cylinder, square based pyramid, triangular prism, cube, parallelogram, trapezoid, and right circular cone? Plus any info on transformation? Any sites with this information? Thanks in advance.

2007-12-19 12:09:51 · 3 answers · asked by Anonymous in Mathematics

1)
offers the possibility of replacing defective alleles with normal ones.
2)
has been used successfully to treat victims of Huntington disorder by removing the dominant damaging autosomal allele and replacing it with a harmless one.
3)
has not yet been used successfully with mammals.
4)
all of these
5)
is a surgical technique that separates chromosomes that have failed to segregate properly during meiosis II.

I am stuck on a practice quiz. Please help if you can, thanks! :)

2007-12-19 12:08:22 · 2 answers · asked by daitheflu99 2 in Biology

please help!!

2007-12-19 12:07:13 · 43 answers · asked by Anonymous in Mathematics

What effect does temperature have on vapor pressure

2007-12-19 12:06:27 · 1 answers · asked by aaadaj 1 in Chemistry

homozygous dominant female

homozygous male

heterozygous male

heterozygous female

homozygous recessive female

I'm stuck on a practice quiz. Thanks

2007-12-19 12:04:57 · 2 answers · asked by daitheflu99 2 in Biology

Which of the following can be observed in a person’s karyotype? (Select all that apply.)
Turner’s Syndrome
Trisomy 21
Color blindness


Which of the following techniques takes advantage of repeated DNA sequences that do not code for proteins?
DNA fingerprinting
genetic engineering
DNA sequencing
rapid sequencing

partscoretotal101What is an example of a trait that is determined by multiple alleles?
Down’s Syndrome
ABO blood groups
hemophilia
Huntington’s Disease

2007-12-19 11:58:36 · 2 answers · asked by girleee1443 2 in Biology

When solving algebraic equations, why is it necessary to follow the rule "What you do to one side of the equation, you must do to the other side"?

2007-12-19 11:56:56 · 7 answers · asked by Stephiiex3 1 in Mathematics

i need help:(

2007-12-19 11:56:33 · 5 answers · asked by Ari 1 in Earth Sciences & Geology

2007-12-19 11:56:17 · 4 answers · asked by Rima 1 in Physics

just list them and use defenitions if posible
thx 2 u

2007-12-19 11:55:59 · 1 answers · asked by nikki 1 in Earth Sciences & Geology

2007-12-19 11:53:48 · 12 answers · asked by eleni e 1 in Earth Sciences & Geology

2007-12-19 11:52:51 · 4 answers · asked by TaylorMade85 2 in Mathematics

and when something is pulled into a black hole, where does it go, is it some kind of time or space warp or is it not really a hole??????????

2007-12-19 11:52:18 · 12 answers · asked by Anonymous in Astronomy & Space

why cant we put nuclear waste in a capsule mounted on a rocket and shoot it to the sun.Even if it was hit by and asteriod wouldnt the waste be deluted by the time it came back to earth

2007-12-19 11:51:40 · 7 answers · asked by southarkansas 6 in Astronomy & Space

...are inside your brain and if you keep thinking about it sometime it will come to you in a burst of inspiration? Not ALL the secrets of course. But ateast some?

2007-12-19 11:51:15 · 2 answers · asked by Trys 1 in Astronomy & Space

heeeeelpppppp

2007-12-19 11:51:07 · 1 answers · asked by alexpurrsaid 1 in Physics

We look back at how mankind lived in 1907 as primitive

1 -What kind of teck know how do you think we will have then.

2 - Answer as if you are the person in 2107 writing an essay on life's hard ships and the what now seems as primitive life in 2007

2007-12-19 11:50:56 · 5 answers · asked by Anonymous in Earth Sciences & Geology

1/6, 5/21
4/9, 15/36

how do i solve those..please please please help i need this done by tomorrow and i have 5 other worksheets in math to finish...so please help..and be detailed...

2007-12-19 11:50:39 · 7 answers · asked by Anonymous in Mathematics

alright, so i have this story problem. i hate these.

water freezes at 32 degrees fahrenheit (or 0 degrees celsius) and boils at 212 degrees fahrenheit (or 100 degrees celsius). write a linear equation that models the temperature in degrees fahrenheit (F) in terms of the temperature in celsius (C).

i can't find the relation between them :(
thanks!

2007-12-19 11:49:39 · 3 answers · asked by k4y14hhh 2 in Mathematics

An adult exerts a horizontal force on a swing to raise a child a height h above the lowest point of the cycle.

a)What is the horizontal force that the adult exerts?
b) What is the speed of the child at the bottom of the cycle?
c) What is the tension in the rope (use m,L,g)
d) If the child jumps straight off (horizontally) at the bottom of the cycle where will the child land(Assume L = 2m, h= .5 meters and the height above the ground at the lowest point is .5 meters).

2007-12-19 11:48:37 · 1 answers · asked by Ree H 1 in Physics

x-2y OVER 8 = 1/2
and
3x+2y=4

My teacher didn't even go over this, so can someone explain it to me?

2007-12-19 11:41:13 · 8 answers · asked by Anonymous in Mathematics

-3x + y = 7

6x -2y = -14

--------------

-3x + y = 7

y = 7 + 3x

6x -2(7 + 3x) = -14

6x - 14 + -6x = -14

0 = 0
Or is that many solutions?

2007-12-19 11:34:51 · 9 answers · asked by Anonymous in Mathematics

I have tons of guesses and they are: hovercrafts, spacesuits and such.... ok maybe a few guesses but what are your guesses?

2007-12-19 11:34:14 · 10 answers · asked by carlytucci 3 in Astronomy & Space

2007-12-19 11:34:05 · 5 answers · asked by Humvee256 2 in Physics

I live in the Mt. Washington Valley area in New Hampshire and I was wondering if we're going to have school tomorrow.

2007-12-19 11:32:07 · 2 answers · asked by Bestest Moron 2 in Weather

I have a 12v/5ah sealed lead-acid battery wired to inverters, which are then wired to cold cathode tubes for a lighting effect under plexiglass on a table. My question is, what kind of on/off switch can I use to easily power the lights on and off without disconnecting the battery every time. Also, where in the line would it best be places?

Battery--->(split three ways)--->3 Inverters--->(split two ways each)--->lights (6 total). Make sense?

2007-12-19 11:31:59 · 2 answers · asked by MrTommyTCD 3 in Engineering

2007-12-19 11:28:07 · 26 answers · asked by leopard 1 in Zoology