Physics - January 2007

Question: A typical 12-V car battery can deliver about 7.5 x 10^5 C of charge before dying. This is not very much. To get a feel for this, calculate the maximum number of KILOGRAMS of water (100 deg celsius) that could be boiled into steam (100 deg celsius) using energy from this battery.

My Thoughts:
I know V = EPE/q is supposed to utilized in this problem. i tried to substitute some equations into the problem, but they don't seem to fit!! i want to get a mass amount...i just don't know how to do that. someone help me out by showing me how to do the problem! appreciate all the help i can get.

Book Answer: 4 kg (just for checking purposes!)

(i will award a best answer - i promise)

2007-01-27 15:41:39 · 2 answers · asked by Anonymous

And where is he,I'm sorry,when is he now?Was he a Time traveler?

2007-01-27 15:28:37 · 2 answers · asked by Jo 4

A cyclist Amoves with a speed 3.0 m/s to the left(with respect to the road). A second cyclist, B, moves on the same straight-line path as A with a relative velocity of 1.0 m/s with respect to A. What is the velocity of B with respect to the road. And a third cyclist has a relative velocity with respect to A of -2.0m/s. Whatis the velocity of C with respect to the road?

*What does it mean when it says "What is the velocity of B with RESPECT TO THE ROAD" and "A third cyclist has a RELATIVE VELOCITY WITH RESPECT TO A OF -2.0 m/s. WHAT IS THE VELOCITY OF C WITH RESPECT TO THE ROAD", specifically the capatilized parts

And also how do you solve the questions

2007-01-27 15:25:42 · 3 answers · asked by bob c 2

2007-01-27 15:24:16 · 4 answers · asked by Anonymous

2007-01-27 15:21:25 · 5 answers · asked by classic_vintage20 1

a noisy machine in a factory produces a decibel rating of 80dB. How many identical machines could you add to the factory without exceeding the 90dB limit set by federal regulations?

2007-01-27 15:16:10 · 1 answers · asked by Jackie 2

2007-01-27 14:43:56 · 14 answers · asked by Anonymous

with the inside wall being made of nothing but the mirrors used in police interrogations, so that you could see inside, but the mirror wouldn't reflect your image, and there were no objects of any kind that are visible, inside of the sphere, what would be displayed in the mirrors?

2007-01-27 14:24:53 · 5 answers · asked by Anonymous

A.) Truck 1=
B.) Truck 2=

You are a traffic accident investigator. You have arrived at the scene of an accident. Two trucks of equal mass(3,000 kg each) were involved in a rear-end accident at a stop sign. here is what you know:
Truck 1 approched the intersection from the top of a 22-meter hill.
Truck 2 was on a flat stretch of road directly in front of truck 1.
At the bottom of the hill, before braking for the stop sign, Truck 1 was going 20 m/s and truck 2 was going 35 m/s.
From the skid marks on the road you can see that truck 1 applied force on its brakes for 2 seconds, 80 meters before the stop sign.
There were no skid marks left by truck 2. The collision occured at the stop sign, where truck 2 had stopped.
After the collision, both trucks were moving together in the same direction at 10 m/s, before slowly rolling to a stop.
You must now push truck 2 using 1,000 N of force, 8 meters off the side of the road so no one else gets hurt.

2007-01-27 14:12:33 · 1 answers · asked by krysdizzle_2006 1

2007-01-27 13:58:31 · 7 answers · asked by blah b 1

Do you think the bottom line is love or money?

2007-01-27 13:45:02 · 9 answers · asked by Gypsy Gal 6

A constant net force of 410 N is applied upward to a stone that weighs 32 N. The upward force is applied through a distance of 2.0 m, and the stone is then released. To what height, from the point of release, will the stone rise?

Please help me with this problem.
I'm having trouble solving it.

I asked this question once before, but I was confused with the answers received.

2007-01-27 13:36:09 · 2 answers · asked by swimmertommy 1

How come we haven't found it out yet, or is it just our perception on things, because we always ask "What came before that"? AND can time itself be disproved, because all the past is is our memory, and the future hasn't happened yet, and if it had no beginning how could it exist? To anyone who says there was a beginning of time and time does exist, well how do you know there was a beginning if you don't know when it was, if it at all did begin.

2007-01-27 13:29:56 · 3 answers · asked by Anonymous

2007-01-27 13:29:50 · 1 answers · asked by abcdefghijk 4

One person says that when a comapss is taken across the equator, it turns around and points in the opposite direction. Another person says that people in the Southern Hemisphere use the south magnetic pole of the compass to point toward the nearest pole.

Which one is correct and why?

2007-01-27 13:03:12 · 2 answers · asked by Melissa 2

2007-01-27 12:56:16 · 3 answers · asked by Anonymous

I know this is impossible, but humor me, If you had a straight hole that went completely through the Earth and dropped a pebble in would it fall through or would gravity stop it dead straight in the center?

2007-01-27 12:46:20 · 18 answers · asked by the walrus 1

2007-01-27 12:22:57 · 5 answers · asked by Anonymous

what is the sum of three vectors that when placed tip to tail, form a triangle? If the vectors represent forces on an object what does this imply about the object.

2007-01-27 12:19:40 · 4 answers · asked by DEXTER10 3

2007-01-27 11:56:48 · 3 answers · asked by naenae 1

2007-01-27 11:52:05 · 4 answers · asked by naenae 1

...with you right in the middle with 2 perfect symmetrical lines and the forces are of equal strength...what would happen?

2007-01-27 11:32:12 · 7 answers · asked by Terry The Terrible 5

2007-01-27 11:29:16 · 6 answers · asked by ♥femme fatale♥ 2

I'm doing a project on Dark Matter for my physics class, but all the sources that I have found on it assume that the reader has a certain amount of background knowlege which I seem to be lacking. Can anyone explain it to me in simple, 9th grade language? I'd really appreciate the help. :)

2007-01-27 11:22:23 · 3 answers · asked by Anonymous

2007-01-27 11:16:20 · 9 answers · asked by alfreja03 1

Is it the force of the ground on him?
or the force he exerts on the ground?

2007-01-27 10:44:30 · 7 answers · asked by Sofia 1

Say it is regular piece of paper for a printer, but just an atom thin, how many times would you be able to fold it up in half?

2007-01-27 10:31:19 · 7 answers · asked by Terry The Terrible 5

thx!

2007-01-27 10:18:46 · 1 answers · asked by lyxl_2005 1

2007-01-27 10:11:24 · 3 answers · asked by Lubna M 2

For example, every person has some chance of getting hit by a lighting, or winning a lottery ticket jackpot. I'm talking about the smallest possible odds that can happen to you. So wouldn't all the smallest odds that can happen to you with a normal life turn into 100% happening if you live forever?

2007-01-27 10:09:24 · 5 answers · asked by Believe me 3