Science & Mathematics - 17 September 2007

I'm just wondering because i like to smoke my pipe tobacco and have the occasional cigar every now and then.

2007-09-17 12:37:15 · 13 answers · asked by Anonymous in Astronomy & Space

CHRISTIANS --------- if you think your clever and you tell me God created the Universe or to pick up the bible and read about it, I want to emphasize HOW not WHO.

2007-09-17 12:36:56 · 6 answers · asked by Mercury 2010 7 in Astronomy & Space

2007-09-17 12:33:42 · 4 answers · asked by Anonymous in Other - Science

2007-09-17 12:30:37 · 9 answers · asked by StarStruck 2 in Mathematics

2007-09-17 12:29:06 · 8 answers · asked by Anonymous in Geography

Tina begins to accelerate at a steady 2.30 m/s^2 at the instant when David passes.
How far does Tina drive before passing David?
What is her speed as she passes him?

2007-09-17 12:26:37 · 2 answers · asked by Anonymous in Physics

You're rowing a boat perpindicular to the shore of a river that is flowing at 3 m/s. The velocity of you're boat is 4 m/s relative to the water. What is the velocity of your boat relative to the shore? and what is the component of your velocity parallel to the shore?

2007-09-17 12:26:35 · 1 answers · asked by Anonymous in Physics

Where is each of them used??

2007-09-17 12:25:35 · 7 answers · asked by Anonymous in Weather

I want to control a DC motor using Atmega8515.I want to know details about controlling motors using PWM.Another question, I want to know if there is faster motor than DC motor.

2007-09-17 12:25:19 · 3 answers · asked by Islam Refaat 1 in Engineering

Have a friend hold a ruler by one end, letting the other end hang down vertically. At the lower end, hold your thumb and index finger on either side of the ruler, ready to grip it. Have your friend release the ruler without warning. Catch it as quickly as you can. If you catch the ruler 5.2 cm (~2.0 inches) from the lower end, what is your reaction time?

2007-09-17 12:25:02 · 5 answers · asked by Anonymous in Mathematics

If Santa slides 10.0 before reaching the edge, what is his speed as he leaves the roof?

2007-09-17 12:25:01 · 2 answers · asked by Anonymous in Physics

For example a chart that tells how many mL= l, or how many centimeters equals a kilogram.

2007-09-17 12:24:11 · 2 answers · asked by Anonymous in Engineering

this is my question
Hans stands at the rim of grand canyon and yodels down to the bottom. He hears his yodel echo back from the canyon floor 5.20sec later. Assume that the speed of sound in air is 340.0m/s. How deep is canyon at this location?
Okay this what i don't understand is i use my equations and i get a result different then the the answer give in the book
and correct answer is 884m and i get is double of it which is 1768, so if anyone could help me understood it and how to get it.

2007-09-17 12:22:56 · 1 answers · asked by Anonymous in Physics

This has got me stumped. I'm taking organic chem part 1 in college

2007-09-17 12:22:16 · 2 answers · asked by Anonymous in Chemistry

Which mass measurement contain s four significant figureS?..
0.0086 g, 0.431 g, 1003 g, 3870 g

2007-09-17 12:20:52 · 5 answers · asked by Mike C 1 in Chemistry

2007-09-17 12:20:46 · 3 answers · asked by cubedude56 1 in Chemistry

Some guy hikes/swims (depending on terrain) 1 mile south, 1 mile east, and 1 mile north. He finishes at the same point at which he started. Indentify all the possible places he could have started.

2007-09-17 12:18:21 · 8 answers · asked by Anonymous in Mathematics

2007-09-17 12:15:37 · 1 answers · asked by Anonymous in Mathematics

This how our universe began..correct me if I'm wrong but you need proof.
Outside our universe there is another universe.
Now we were one massive black hole.
16 billion years ago we exploded creating what is now our universe.
We are expanding within the other universe.
one day we will become part of that other universe when we slow down to its speed..
And then we will see more galaxy's than we ever dreamt possible...amen

2007-09-17 12:14:37 · 13 answers · asked by Anonymous in Astronomy & Space

If an object weighs 100 Newtons on Earth, is the mass of the object is 100N/9.81m/s^2 = 7.17 kg. Correct?
Is the mass of the object on the moon the same?

So is the mass of an object the same no matter where it is in the universe?

2007-09-17 12:12:58 · 7 answers · asked by cookie 2 in Physics

2007-09-17 12:12:51 · 3 answers · asked by alisherzz 1 in Chemistry

if you could answear this it would be a real help i need all the info i can fo the project i got to do and also if you can tell me a website i could use to find this information and information about how dogs react to the moon to that would be a real help

2007-09-17 12:12:27 · 3 answers · asked by funkyjason11 2 in Astronomy & Space

You and a friend each drive 50.0 km. You travel at 90 km/h; your friend travels at 95.0 km/h. How long will your friend wait for you at the end of the trip?

I'm not even sure where to start with this problem...

2007-09-17 12:12:07 · 2 answers · asked by Katie E 2 in Physics

can we travel faster than light?

2007-09-17 12:10:12 · 9 answers · asked by Mercury 2010 7 in Astronomy & Space

Barium crystalizes in a body-centered cubic system with atoms at all lattice points and an edge length of 5.02 angstroms. Calculate its density in g/cm3.

please explain if u can how u got the answer. thanks

2007-09-17 12:08:46 · 1 answers · asked by Hank_Remix 2 in Chemistry

A pendulum is swinging freely. At the top of it's swing

A potential energy = 0
B kinetic energy is a maximum
C potential energy = kinetic energy
D kinetic energy = 0

2007-09-17 12:08:08 · 2 answers · asked by CarzCrashzHeartz 3 in Physics

2007-09-17 12:07:47 · 4 answers · asked by RR 1 in Medicine

2007-09-17 12:07:40 · 6 answers · asked by Eye of Ra 1 in Astronomy & Space

Ok when the big bang happened the universe was formed and began to expand outward, now here is what i'm confused about, time moves forward as the universe expands, and the universe becomes a bigger place so if a person was to travel back in time would everything be smaller because the universe was smaller at the time you travelled back to, sure going back in time 20 years probably wouldn't make a difference but what about 100 millions years ago, wouldn't sub atomic particals be smaller because the whole universe was smaller and more compact?

2007-09-17 12:07:26 · 17 answers · asked by Anonymous in Astronomy & Space

Hydrologic pressure in a subterranean aquifer pushes 900 lb of water 80 ft to the surface through a natural spring in 2.0 minutes. How much power is utilized?

2007-09-17 12:06:10 · 1 answers · asked by CarzCrashzHeartz 3 in Physics