Physics - December 2006

A 39.9 kg girl and a 57.4 kg boy are on the surface of a frozen lake, 10.0 m apart. Using a rope, the girl exerts a horizontal 5.60 N force on the boy, pulling him toward her. Calculate the magnitude of the girl's acceleration.

2006-12-04 02:14:12 · 4 answers · asked by Anonymous

What are the following defined as and what is their formula?
Frequency
Amplication
Wavelength

2006-12-04 01:43:35 · 4 answers · asked by the_immortal89 2

2006-12-04 01:37:02 · 4 answers · asked by Anonymous

2006-12-04 00:49:46 · 4 answers · asked by Camille H 1

1. What is Dark matter

2. What is Dark energy.

2006-12-04 00:37:16 · 4 answers · asked by Anonymous

2006-12-04 00:25:35 · 4 answers · asked by Ruchika 1

I've read we are all made of stardust, that the atoms in our bodies could have once been part of a star and that they have been around since the creation of the universe.

So if this is true, could it be true to think that in some way after you die, after you decompose into the Earth, a worm eats the earth, a chicken eats the worm and someone eats the chicken then maybe the atoms apart of us now may make there way into another life and though I won't be me, I'll be aware of existance, alive again.

A bit of a sci fi take on the afterlife idea

2006-12-04 00:08:23 · 6 answers · asked by scott e 1

2006-12-03 23:45:54 · 3 answers · asked by Anonymous

2006-12-03 23:35:40 · 3 answers · asked by Life is Like A Box of Chocolate 1

a uniform meter stick supported at a 25-cm mark balances when a 1 kg rock is suspended at the 0 cm end. What is the mass of the meter stick??

2006-12-03 23:25:06 · 7 answers · asked by Anonymous

ASAP! PLS!

2006-12-03 23:12:25 · 4 answers · asked by mhel 1

plz read the following very carefully.
we do work to move a box on an inclined plane...
we have to prove that work done = fs cos theta
for proving f s cos theta:
we can do by 2 methods,...

1)by finding the component of displacement of body in the direction of force.

here,...surely the work we are finding is the work we do in that particular direction?
so ...it is not equal to the full work ?

2)we find the component of force applied in the direction in which the object oves on the inclined plane.
as this is the direction in which the object is movng ,..surely this is the total work done.?

but in accord with the first method...we got ...F * S cos theta
in accord with the 2nd method,...we got ...Fcos theta* S
so both of them are equal...but how can that be when one is measuring only work along a specific direction and the other work in the whole?

i would really prefer an explanation in logic rather than by mathematics.
i know it will take time...but plz do help.

2006-12-03 22:33:33 · 7 answers · asked by catty 4

2006-12-03 22:28:56 · 10 answers · asked by Anthony R 4

A 4500-kg helicopter accelerates upward at 2.0m/s squared. What lift force is exerted by the air on the propellers?

Please show work so i can understand.....thanks

2006-12-03 22:28:16 · 3 answers · asked by Anonymous

2006-12-03 21:26:15 · 2 answers · asked by Anonymous

I am working on a Science project, and it has something to deal with batteries lighting up a lightbulb. I just have to know which brand of battery can light a lightbulb the longest. Let's just say give me two brands of batteries and if you know, please tell me which one can light it the longest. Thank you.

2006-12-03 21:13:24 · 4 answers · asked by Anonymous

2006-12-03 21:05:03 · 2 answers · asked by sakhawat hossan 1

2006-12-03 20:55:09 · 5 answers · asked by monlapa 1

2006-12-03 20:48:42 · 4 answers · asked by Anonymous

2006-12-03 20:28:34 · 9 answers · asked by Illeagal Alien 3

A block of mass m = 2 kg is held in equilibrium on an incline of angle of 60 degrees by a horizontal force.

a. Determine the magnitude of this horizontal force.
b. Determine the magnitude of the normal force on the block.

2006-12-03 20:23:56 · 5 answers · asked by Some Guy 2

2006-12-03 19:52:39 · 6 answers · asked by aye_eye 1

A block of wood floats in fresh water with two-thirds of its volume V submerged and in oil with 0.90V submerged. please explain how to find the density of the wood and oil, thanks!

2006-12-03 19:42:14 · 2 answers · asked by uoprummel 2

2006-12-03 19:20:09 · 3 answers · asked by Life is Like A Box of Chocolate 1

2006-12-03 19:13:57 · 9 answers · asked by sligons 1

2 balls are released from 1 meter high at the exact same time. Ball 1 is simply dropped and ball 2 is launched off the edge of a desk from a ramp. Will both balls hit the floor at the same time? Why or why not?

2006-12-03 19:08:18 · 4 answers · asked by susie q 2

2006-12-03 18:57:58 · 8 answers · asked by Shehzad Khan 1

i'll give best answer if its good

2006-12-03 18:48:03 · 4 answers · asked by sligons 1

give reasons for your answers

2006-12-03 18:42:45 · 20 answers · asked by shabbarboy1991 2

2006-12-03 18:40:02 · 3 answers · asked by paredesal2910 1