Science & Mathematics - 10 September 2007

not sure how to do this plzz help v=change in distance/time

2007-09-10 10:15:04 · 4 answers · asked by Anonymous in Physics

A uranium projectile fired from a tank in Iraq has a volume of 340.20 cm3 and an intital kinetic energy of
1.98 x 103 kJ. What is the muzzle velocity of the tank's gun (m/s)?
The density of uranium is 18.95 g/cm3.
I am unsure where to begin. I use the formula E(kinetic) = 1/2 m * v^2. Do I set d = m/v to determine the mass and then proceed forth from there?

2007-09-10 10:14:19 · 2 answers · asked by sleepthei 3 in Physics

PLEASE HELP!!!!

2007-09-10 10:12:59 · 6 answers · asked by Diana G 1 in Astronomy & Space

A young woman named Kathy Kool buys a sports car that can accelerate at the rate of 5.46 m/s^2. She decides to test the car by drag racing with another speedster, Stan Speedy. both start from rest, but experienced Stan leaves the starting line 1.172 before kathy. Stan moves with a constant acceleration of 3.95 m/s^2 and Kathy maintains an acceleration of 5.46 m/s^2

Find the time it takes Kathy to overtake Stan. Answer in units of s.

Find the distance she travels before she catches up with him. Answer in units of m.

Find the speed of Stan's car at the instant she overtakes him. Answer in units of m/s.

Find Kathy's speed at thtat instant. Answer in units of m/s.

2007-09-10 10:10:41 · 1 answers · asked by Jaweida S 1 in Physics

please help.

2007-09-10 10:09:56 · 2 answers · asked by Jess-Jess 1 in Mathematics

A surveillance satellite circles Earth at a height of h miles above the surface. Suppose that d is the distance, IN MILES, on the surface of the Earth that can be seen from the satellite.

(a) Find an equation that relates the central angle theta to the height h.

(b) Find an equation that relates the observable distance d and theta.

(c) Find an equation that relates d and h.


NOTE: The radius of Earth is 3960 miles.

2007-09-10 10:09:01 · 3 answers · asked by journey 1 in Physics

Yeah, again doing a review from two grades ago and lost. Any links for Algebra I would help and how you do this problem.

2007-09-10 10:06:23 · 7 answers · asked by Adam 5 in Mathematics

Science has allowed us to clone animals with DNA. If we were to find Jesus's DNA, say where he was crucified at, would we be able to clone Him since we would have his DNA? What would His DNA look like even if we found it? Couldn't we determine then if God was man or if God was God? Or would we not even think it was DNA because God is God and we couldn't even know if God has DNA?

2007-09-10 10:06:03 · 11 answers · asked by Anonymous in Biology

Ben was 20 years old in 1980, but only 15 years old in 1985.
How come?

2007-09-10 10:05:38 · 4 answers · asked by Christine P 5 in Mathematics

2007-09-10 10:04:58 · 2 answers · asked by nee f 1 in Engineering

I am trying to teach my young son about spiders, and have been picking them up and have been encouraging him to the same, this is so that he is not scared of them when he gets older.
As far as I am aware there are no British spiders that are harmful to humans. Does anybody know any different?

2007-09-10 10:03:44 · 19 answers · asked by Anonymous in Zoology

It seems like every day when I go online to get news, I come across a report about a new study that "suggests" something or states emphatically that ________ "may" cause ________.

What on earth are we expected to do with such vague non-conclusions? Alter what we're doing? Quake in our boots? Run screaming for the hills like psychotic banshees?

It's all rather ludicrous. Look at how science will say that something definitely causes cancer, then will recant that claim a few years later.

I'm certainly not anti-science. I just think it's odd that things are published that are, in fact, only hunches as opposed to conclusive determinations.

If all these highly funded scientists want to study something worthwhile, how about getting to the bottom of where those extra socks go every time we lose one in the laundry?

2007-09-10 10:03:36 · 5 answers · asked by The Snappy Miss Pippi Von Trapp 7 in Other - Science

While testing the starting system on a car, Valmai discovered that the current flow to the starter is 330 Amperes, During the test, the voltage drop across a car starter is 11 Volts. What is the resistance?

2007-09-10 10:03:28 · 2 answers · asked by Ethan F 2 in Engineering

I need the ratio of 7.98 x 10^7 to 2.21 x 10^7

I'm getting 798:221

2007-09-10 10:03:08 · 3 answers · asked by grouchy187 2 in Mathematics

ok. what is a good message about math that i can write about? and what picture can go with that? plz help i really not good at this.!

2007-09-10 10:03:05 · 6 answers · asked by Anonymous in Mathematics

who is the constellation Bootes named after

2007-09-10 10:02:38 · 3 answers · asked by can-d-cane 3 in Astronomy & Space

the height 'h' meters above the ground of a ball 't' seconds after it has been thrown up in the air is given by the expression: h=1.5 + 3t - 2t^2
1)from what height is the ball thrown?
2) at what time does the ball hit the ground?
3) what is the greatest height that the ball reaches?

2007-09-10 10:02:16 · 7 answers · asked by Anonymous in Mathematics

2007-09-10 10:01:40 · 6 answers · asked by Ethan F 2 in Engineering

A plane leave a certain airport from runway 4 RIGHT, whose bearing is N40degreesE. After flying for 1/2 mile, the pilot requestd permission to trun 90 degrees and head toward the southeast. The permission is granted. After the airplane goes 1 mile in this direction, what bearing should the control tower use to locate the plane?

After my work, I got S23.4degreesE but the book's answer is
S76.6degreesE.

How do I get the book's answer? Why is my answer wrong?

2007-09-10 10:01:21 · 2 answers · asked by journey 1 in Physics

If so will we see one visible to the naked eye in the next 50 years?

2007-09-10 10:00:49 · 23 answers · asked by oohgravy 4 in Astronomy & Space

In the given triangle, find to the nearest centimeter the length of the side marked x.
http://www.crunchyroll.com/user/babiixjen_x3/photos/2239630

2007-09-10 09:59:27 · 8 answers · asked by Anonymous in Mathematics

How do you find a physics formula from a table of values? I can only do it with Excel ... Like how can you tell when to use y=1/x^3 instead of y=1/x^2, when the graphs look extremely similar? For example, I will type 2 data tables.
_________
A B
2 100
8 200
50 500
200 1000
--------------

____________
E F
2 90
54 270
16 180
250 450
--------------

The first table is square root while the second is cubed root, but when I graphed them, they looked almost exactly the same ...

2007-09-10 09:57:36 · 3 answers · asked by Anonymous in Physics

4x+3(2x-5)+6(1-5x)

The answer to this question is
-10-9


but what are the steps on solving this equation...????

2007-09-10 09:57:18 · 10 answers · asked by Anonymous in Mathematics

My teacher asked us to research the meaning of a formula. I don't know how to type it up into google or anything so I was hoping someone can help me.
http://i5.photobucket.com/albums/y162/MuffinMilk/formuala.jpg
^that's the formula, i had to write it and then scan it
please + thank you.

2007-09-10 09:56:48 · 3 answers · asked by emitothelee 1 in Physics

2007-09-10 09:54:54 · 3 answers · asked by azkobushi 2 in Engineering

starts with the letter c or g

2007-09-10 09:53:42 · 4 answers · asked by Anonymous in Geography

2007-09-10 09:52:14 · 5 answers · asked by Anonymous in Physics

Determine whether the sequence is increasing, decreasing, or monotonic. Is the sequence bounded?

1) an= 1/(2n+3)

2) an= n + 1/n

can you show the steps/explain..thanks

2007-09-10 09:51:07 · 1 answers · asked by Anonymous in Mathematics

A sequence {an} is given by a1= (radical 2) and a(n+1)= radical (2 + an).

a) by induction or otherwise, show that {an} is increasing and bounded above by 3. Apply the Monotonic Sequence Theorem to show that lim n -> infinity of {an} exists.

b) Find lim n -> infinity of {an}

2007-09-10 09:50:24 · 1 answers · asked by Anonymous in Mathematics

Tell me anything you know about this question. It would be greatly appreciated!

2007-09-10 09:50:09 · 1 answers · asked by robert johnson 2 in Chemistry