Physics - March 2007

How do the molecules know that they are no longer part of a single entity (the loaf) but rather part of a separate entity("*the slice"). Do they have infinite memory? or will they forget, and drift back into the loaf state eventually?

2007-03-27 08:45:52 · 8 answers · asked by longk 2

According to Coulomb's Law, if the distance between the nucleus and electron were doubled, the force would be

1/4 as much.

1/2 as much.

two times as much.

four times as much.

2007-03-27 08:24:36 · 3 answers · asked by mac_addict 3

2007-03-27 08:13:41 · 9 answers · asked by Anonymous

Starting at rest at the edge of a swimming pool, a 72.0-kg athlete swims along the surface of the water and reaches a speed of 1.20 m/s by doing the work Wnc1= +161 J. Find the nonconservative work, Wnc2, done by the water on the athlete.

Explanations would be appreciated. Thanks!

2007-03-27 08:02:26 · 3 answers · asked by 123haha 1

The potential energy of a particle moving along the x axis show in the image (click on link below for image). When the particle is at x = 1.0 m it has 3.6 J of kinetic energy. a) What is the total mechanical energy of the system? b) What is the smallest value of x the particle can reach? c) What is the largest value of x the particle can reach?

LINK FOR THE IMAGE: http://img.photobucket.com/albums/v156/PNHTran88/46.jpg

Note:

A has values 0 m and 10.0 J
B has values 2.0 m and 2.0 J
C has values 3.0 m and 6.0 J
D has values 4.0 m and 5.0 J
E has values 5.0 m and 10.0 J

Thank you so much!

2007-03-27 08:00:46 · 3 answers · asked by 123haha 1

2007-03-27 07:58:19 · 2 answers · asked by Gypsy Gal 6

Photons have no mass, therefore they can travel at the speed of light (mass cannot increase if you start with 0). Then how do black holes' gravity suck photons back into the black hole itself? In order for gravity to work, an object of a mass must be present.

2007-03-27 07:36:02 · 8 answers · asked by Anonymous

a) A 3.0 kg ball has a velocity of 25 m/s downward just before it strikes the ground and bounces up with a velocity of 25 m/s upward. What is the change in momentum (impulse) of the ball?

b) If the ball is in contact with the ground for 0.20 seconds, what is the average force experienced by the ball on impact with the ground?

Thanks...

2007-03-27 07:04:52 · 2 answers · asked by LesJerLayne 2

A golf ball with mass 4.500×10−2 is moving in the +x-direction with a speed of 9.45 , and a baseball with mass 0.145 is moving in the -y-direction with a speed of 6.80 .

2007-03-27 07:02:01 · 2 answers · asked by ? 1

A baseball with mass 0.145 is moving in the +y - direction with a speed of 1.40 , and a tennis ball with mass 5.70×10−2 is moving in the -y - direction with a speed of 7.87 .

2007-03-27 07:01:10 · 2 answers · asked by ? 1

A 90.0 kg box of books slides from rest down a frictionless incline from a height of 5.0 meters. A constant frictional force introduced at point A, then brings the box to rest at point B which is located 19.0 meters to the right of point A. (Assume sliding from A to B is along a horizontal surface).

a) What is the speed of the box just before it reaches point A?
b) What is the coefficient of kinetic friction, µ sub k, of the surface from A to B?

2007-03-27 07:00:31 · 1 answers · asked by LesJerLayne 2

Can all ocean boats float in fresh water?

2007-03-27 06:58:38 · 10 answers · asked by Megan L 1

2007-03-27 06:44:32 · 3 answers · asked by jennytheowl 1

2007-03-27 06:37:24 · 3 answers · asked by Monty 1

Not homework.

2007-03-27 06:28:31 · 3 answers · asked by Dovey 7

Polarization can be observed.....
>
> for all types of waves.
>
> for light waves.
>
> for short wavelengths.
>
> only at night.

2007-03-27 06:26:54 · 4 answers · asked by mac_addict 3

this depth? quarter diameter= 2.4 cm

#1. What hydrostatic pressure at a depth of 5.0 meters in a freshwater lake
anwer
2.75 kg

i am horrible at math need all help I can get when studying.

2007-03-27 06:22:31 · 1 answers · asked by Fresca 2

which phenomenon is associated w transverse waves but not with longitudinal.these are different waves but how then we draw them as sinosodial curve.in sinosodial curve at the peak point or maximum the velocity or acceleration will be zero or not.if in graph curve is moving upward why the particle will be moving downward

2007-03-27 06:13:33 · 1 answers · asked by ghulamalimurtaza 3

2007-03-27 05:52:28 · 5 answers · asked by HannahMontanaRox 1

?

2007-03-27 05:35:27 · 2 answers · asked by Fresca 2

2007-03-27 05:30:22 · 4 answers · asked by HannahMontanaRox 1

2007-03-27 05:29:51 · 1 answers · asked by HannahMontanaRox 1

what are some of the good books that try to explain why time travel is impossible?

OR i wouldnt even mind going thru some good websites

2007-03-27 05:26:37 · 6 answers · asked by sh 1

2007-03-27 05:09:18 · 4 answers · asked by Fresca 2

a vertically supported spring has a force constant of 660n/m. a stone of mass 6kg is placed on top of the spring, pushed down until it is 0.25m from the equilibrum position and the released. how HIGH above the release point does the stone rise ?

2007-03-27 05:03:48 · 1 answers · asked by stanezzz 1

can it hold?? thank you

2007-03-27 05:00:48 · 4 answers · asked by Fresca 2

that time is a torund (donut shaped) and we are like an ant on it, so it seems like we are travelling linearly but really we're curving all over the place?

I was thinking the other day and I just sort of stumbled across this idea -- I may have seen it on tv a long time ago, I don't know -- and I thought "Huh. That's really cool." because you know what?

It eliminates the need for a creator because there is no beginning and there is no end. Not only is it a circle it is also 3D if you will, so there is absolutely no beginning or end. Then you don't have to worry about "Well what was before the big bang?" because everything was and nothing was, in the sense that it is a torund.

Oh, and if you are wondering "Who created the torund?", nobody created it because the torund is time and nobody/nothing can make time.

So what do you think?

2007-03-27 04:57:18 · 8 answers · asked by Rat 7

Two particles, with identical positive charges and a separation of 2.00 * 10^ (-2) m, are released from rest. Immediately after the release, particle 1 has an accleration a1 whose magnitude is 4.600 * 10^3 m/s ^2, while particle 2 has an acceleration a2 whose magnitude is 8.50 * 10^3 m/s^2. Particle 1 has a mass of 6.00*10^-6 kg.

a) Find the charge on each particle:


b) Find the mass of particle 2:

2007-03-27 04:41:04 · 2 answers · asked by Alan l 1

And would the boomerang do more damage if it were on fire? If it were frozen? If it had a gernade attached to it, your answer's please.

2007-03-27 04:37:36 · 2 answers · asked by Mootron 2

A charge of +q is located at the origin, while an identical charge is located on the x axis at x= 0.55 m. A third charge of +5 q is located on the x axis at such a place that the net electrostatic force on the charge at the origin triples, its direction remain unchanged. Where should the third charge be located?

2007-03-27 04:37:27 · 2 answers · asked by Alan l 1