Science & Mathematics - 29 October 2007

Please provided details, answers, and how you got to your answer.

Problem 1:
A ball is dropped from the top of a building and hits the ground 4.6 seconds later. How high is the building?

Problem 2:
A cannon fires an object with an inital velocity of 40 m/s at an angle of 25 degrees. How long is the object in the air? What is the maximum height of the object? What is the range of the object?

Problem 3:
A projectile remains in the air for 6.0 seconds after it is fired. The horizontal component of its velocity is 100 m/s. How far did the object move forward before it hit the ground? How long after firing did the projectile reach it's maximum height? How high up did the projectile go?



Thank you. I am studying for a test and really need help

2007-10-29 09:15:58 · 1 answers · asked by Courtney B 1 in Physics

2007-10-29 09:10:46 · 6 answers · asked by Anonymous in Mathematics

i need some example energy bond values for ionic, covalent and metallic bonding...please help.

2007-10-29 09:09:07 · 3 answers · asked by Anonymous in Chemistry

Help!!!

2007-10-29 09:06:27 · 3 answers · asked by Anonymous in Physics

2007-10-29 09:04:56 · 8 answers · asked by Gotti 1 in Mathematics

when water is in a river, lake or water source a city gets there water from is cleaned it goes through all of the processes and then in to homes used water goes through pipes to a cleaning plant then back into the river so how is it clean

if you add the fact about water getting evaporated then it rains back down how can you say that water isnt contaminated.

2007-10-29 09:04:34 · 3 answers · asked by Andreu 2 in Chemistry

40% female, 3male replaced by female to 44% female how many more males than females are in the original
10
12
15
18
20

2007-10-29 09:04:29 · 6 answers · asked by jennifer 2 in Mathematics

I NEED TO TRAVEL BACK IN TIME, AND FIX SUM THINGS I DID. DOES ANYONE KNOW HOW TO MAKE A TIME MACHINE, OR IS THERE A WAY TO GO BACK.. WHAT IF I PRAY TO GOD..WILL HE HELP ME GO BACK IN TIME. PLEASE HELP

2007-10-29 09:04:12 · 13 answers · asked by DR.LOVE16 1 in Astronomy & Space

2007-10-29 09:02:28 · 7 answers · asked by Anonymous in Chemistry

ok guy i finally ask a calculs 1/ general mathematics question lol.will post more!

2007-10-29 09:01:41 · 2 answers · asked by Josianne 3 in Mathematics

2007-10-29 09:01:24 · 3 answers · asked by RogerDodger 1 in Mathematics

You receive a penny on January 1st, two cents the next day, four cents the next day, and so on, doubling every day. How long will it take to be a millionaire? Suppose you started wtih a nickel and doubled, how long before you were worth a million dollars?

2007-10-29 09:00:44 · 8 answers · asked by SM 2 in Mathematics

I'm really looking for the most detailed research on our planets and the moons we have discovered so far.

2007-10-29 09:00:09 · 2 answers · asked by Anonymous in Astronomy & Space

what's 2,193 divided by 43

2007-10-29 08:59:38 · 2 answers · asked by cuddlbunny2003 2 in Mathematics

I understand that n n < ln (n) < n^2 and that n^p is convergent if p > 1. Where do I proceed from there?

2007-10-29 08:59:25 · 1 answers · asked by Mitur 2 in Mathematics

Please help ASAP!

2007-10-29 08:59:04 · 4 answers · asked by SM 2 in Mathematics

Please help me. I need a chemistry tutor. Just give me your email address and I'll email you some of my questions when I get them. Have a nice day. Thank you.

2007-10-29 08:58:47 · 3 answers · asked by Chrishonda Alston 3 in Chemistry

A) C4
B) C4H10
C) C3H8
D) C6H12O6
E) These are all organic molecules.

2007-10-29 08:51:57 · 6 answers · asked by Anonymous in Chemistry

2007-10-29 08:50:55 · 10 answers · asked by Anonymous in Botany

Consider carbon-12, carbon-13 and carbon-14 (the numbers indicate atomic mass). Which of these forms of carbon is an isotope?
A) Carbon-12
B) Carbon-13
C) Carbon-14
D) none are isotopes
E) all are isotopes

2007-10-29 08:50:53 · 8 answers · asked by Anonymous in Chemistry

From this information alone, you can predict that
A) argon has more neutrons than chlorine.
B) argon is more chemically reactive than chlorine.
C) argon will more readily ionize than chlorine.
D) chlorine is more chemically reactive than argon.
E) chlorine has more neutrons than argon.

2007-10-29 08:49:00 · 2 answers · asked by Anonymous in Chemistry

An airplane flies 1000 miles due east in 2 hours and 1000 miles due south in 3 hours. What is the average speed of the airplane?

2007-10-29 08:46:12 · 7 answers · asked by Anonymous in Mathematics

When you look at the moon you see 'the man on the moon' but what really is 'the man on the moon' ?

canyons, mountians or what?

2007-10-29 08:43:46 · 6 answers · asked by Anonymous in Astronomy & Space

differentiate (generalized power function rule)

y = 1/sqrt(3x^2 + 7)

the rule says:

f'(x) = n[g(x)]^n-1 g'(x)

i dont see how this applies to that example? could someone give me a hint, please lol

2007-10-29 08:43:06 · 3 answers · asked by Mathema-what?! 1 in Mathematics

i heard on the radio last night about a theory that some paranormal investigators have.It's that we have lived life many times,and we kind of go through a circle.This explains deja vu and why some people seem to have psychic powers, or know what's going to happen before it's happened (because they've already gone through life several times).I think it's called the Cirlce Theory,I was wondering if anyone could tell me who thought of it,and explain a bit more about it?It sounds really interesting.

2007-10-29 08:41:51 · 19 answers · asked by toastxcore 6 in Paranormal Phenomena

2007-10-29 08:41:48 · 10 answers · asked by matt 1 in Physics

2007-10-29 08:39:40 · 5 answers · asked by matt 1 in Astronomy & Space

if you have proof on websites then that would really help

2007-10-29 08:38:16 · 2 answers · asked by Anonymous in Chemistry

is it possible for someone to live eating nothing but vitamin and mineral pills. and water. no food what so ever. the only thing filling in your stomach is your daily need of vitamins and minerials?

2007-10-29 08:36:05 · 6 answers · asked by Anonymous in Medicine

For my math homework

2007-10-29 08:35:53 · 9 answers · asked by Anonymous in Mathematics