Physics - April 2007

other than the common definition of a force of one pound acting from a distance of one foot

2007-04-12 02:56:26 · 5 answers · asked by Pawnbroker1 1

with examples please!

2007-04-12 00:57:34 · 12 answers · asked by wony L 1

any insight on as many detailed uses in the scientific, mythical, psychological, electromagnetic, illusionary, reality warping, fictional, alchemic or just about anything else I left out. Thanks in advance for the answers.

2007-04-11 23:14:51 · 3 answers · asked by GC 1

Why did Einstein regret that he played a role in the emergence of quantum mechanics ?
and how does the emergence of quantum mechanics change the way that we think about science ??

Thank you.

2007-04-11 22:48:35 · 3 answers · asked by spacəmɐn 2

2007-04-11 22:29:34 · 6 answers · asked by huddy 1

2007-04-11 19:31:38 · 18 answers · asked by Anonymous

A child of 15-kg is in a swing that has two-meter long chains attached to the supporting rod. If the child swings with a speed of 5.5 m/s at the bottom of the arc and is 1.5 meters higher at the top of her swing, determine the change in total energy between the top and bottom of one swing.
A 226 J
B 452 J
C 150 J
D 0 J

2007-04-11 16:20:52 · 2 answers · asked by star wars freak 2

A ball is thrown straight up into the air with an initial speed v, and reaches a maximum height h. If the ball is again thrown vertically, but this time with a speed of v/2, what maximum height will it attain?

2007-04-11 15:28:23 · 1 answers · asked by N 1

Suppose you are on board a spaceship that is passing the earth at 80% the speed of light. You see a clock on earth tick off five seconds. How much time elapsed on your clock while this was happening?

Is it a. 5 seconds-the same as on earth's clocks b. less than 5 seconds if you are approaching earth, or more than five seconds if you are moving away c. less than 5 seconds d. more than 5 seconds

2007-04-11 14:51:49 · 5 answers · asked by Angel Face 2

Here's a series of related questions...

Do forces only translate energy through acceleration?
If so, how can we feel the contact force of the chair pressing against our bodies while sitting motionless on the Earth? Where does the energy required for us to feel the contact force go?
Where does it come from for that matter?
And if an object was never raised above any other object, would it be capable of falling due to gravity?
If two forces are directly balanced, is any energy moved through the system due to those two forces?

2007-04-11 14:41:52 · 6 answers · asked by Anonymous

How do you convert radians per second into miles per hour? If you cannot explain...are there any sites that do? Thanks.

2007-04-11 14:41:35 · 7 answers · asked by *australian*gal* 2

How do i find out how much enegry is needed from a hotplate to sustain the heat inside the the container of a drip type coffee maker?

2007-04-11 14:16:55 · 2 answers · asked by Anonymous

One end of a uniform meter stick is placed against a vertical wall. The other end is held by a lightweight cord that makes an angle with the stick. The coefficient of static friction between the end of the meter stick and the wall is 0.400.

Let the angle between the cord and the stick be 14.0 degrees. A block of the same weight as the meter stick is suspended from the stick, as shown, at a distance from the wall.

http://session.masteringphysics.com/problemAsset/1008117/5/yf_Figure_11_40.jpg

2007-04-11 14:11:17 · 1 answers · asked by Devin B 1

This is 5th grade Science homework . Its dealing with convex lenses................................................

2007-04-11 13:55:21 · 6 answers · asked by sheritol 2

I was looking at the question of squared seconds and I am street smart but logic dumb I looked up the question on yahoo. I think I learned a little but I still don't really get it. So I think if I understand gravitational acceleration then there is some hope for me. Gravitational acceleration is 32 feet per second, per second. Does this mean that an object in its first second of falling has a velocity of 32 feet and after every second its fall accelerates another 32 feet? Is it correct to assume that a free falling object on its first second, of free falling has a velocity of 32 feet per second, and the same object in its second, second of free falling has a velocity of 64 feet per second? What is I know nutting take on this?

2007-04-11 13:54:00 · 2 answers · asked by stalin 2

Assuming the theory of the Big Bang, scientifically how are all of these things explainable? I mean, the pre-existence of matter and the big bang being triggered from nothing... Does the scientific community have an explanation for any of these things, or does the argument come back to a God as the origin for creating the matter and setting off the big bang?

2007-04-11 13:49:46 · 7 answers · asked by Edward Fillet 1

A meter stick is found to balance at the 49.7 cm mark when placed on a fulcrum. When a 49.0 gram mass is attached at the 11.0 cm mark, the fulcrum must be moved to the 39.2 cm mark for balance. What is the mass of the meter stick?

2007-04-11 13:47:46 · 1 answers · asked by Anonymous

a) At what height is half of its energy kinetic and half potential?

b) Using energy considerations only, what is the velocity of the ball just as it hits the ground?

2007-04-11 13:46:32 · 6 answers · asked by JUDY T 3

2007-04-11 13:40:39 · 7 answers · asked by JUDY T 3

Find center of mass of the ladder. To a good approximation, the ladder can be described as consisting of three parts with uniform mass distribution: a left leg(ab) with the mass Mab=10 kg, a right leg(bc) with the mass Mbc=15 kg and a crossbar (de) with the mass Mde=4kg. Coordinates of the points a,b,c,d and e are all given(meters). Xa=0, Ya=0, Xb=2, Yb=5, Xc=4, Yc=0, Xd=1.25, Yd=3, Xe=2.75, Ye=3. Precision of your answer should be atleast .1m

2007-04-11 13:02:58 · 2 answers · asked by ? 1

I NEED TO FIND BACK GROUND RESEARCH ON HOW I CAN MAKE A BOTTLE SPIN BY ONLY MAKING HOLES ON THE SIDES OF THE BOTTLE AND LETTING WATER COME OUT OF THE HOLES
PLEASE SEND ME A LINK TO A WEBSITE FOR THIS

2007-04-11 12:37:00 · 1 answers · asked by DVD 1

I've heard that the green ones can cut paper, but are they more powerful?

2007-04-11 11:52:59 · 8 answers · asked by Why_so_serious? 5

please help

2007-04-11 11:32:32 · 4 answers · asked by ben A 1

I think Oscar Greenberg came up with it but was is the story behind chosing that term?

2007-04-11 11:13:49 · 4 answers · asked by kiwi 2

The moon has a mass of 7.4 x 10^22 kg and completes an orbit of radius 3.8x10^8 m about every 28 days. The Earth has a mass of 6 x 10^24 kg and completes an orbit of radius 1.5 x 10^11 m every year.

What is the speed of the Moon in its orbit? Answer in units of m/s.

What is the kinetic energy of the Moon in orbit? Answer in units of J.

What is the kinetic energy of the Earth? Answer in units of J.

2007-04-11 10:23:08 · 4 answers · asked by p.b 1

Hi,

I am trying to find the radius of convergence for [(2n)!x^n] / (n!)^2. I did the ratio test and have it down to:

[(2n+2)! * x * (n!)^2] / [(2n)! * ((n+1)!)^2].

I was wondering if I could simplify [(2n+2)!] / (2n)! to 1? If so, could I then simplify [(n)!]^2 / [(n+1)!]^2 to 1 as well?


Thanks!

2007-04-11 10:16:05 · 1 answers · asked by Anonymous

that the other people even if the actual temperature was the same or very close to the same help

2007-04-11 09:18:11 · 4 answers · asked by hana s 1

If (a) varies directly as (b) and inversely as (c), then (c) varies______________ as( b) and _____________as (a)

and

If the length of a rectangle is held constant, the area of the rectangle varies __________as the width.

2007-04-11 08:57:05 · 6 answers · asked by GJN 2

And i stepped out just before it hit the ground.Would i die?

2007-04-11 08:45:04 · 6 answers · asked by rock star 5

2007-04-11 08:34:41 · 4 answers · asked by STORMY K 3