Physics - February 2007

2007-02-19 00:22:25 · 2 answers · asked by anarchygirl 1

if so , where does the mass removed from it go?pls explain clearly..

2007-02-18 23:59:01 · 5 answers · asked by fransjack123 1

I know it sounds crazy....but in elliptical orbits, in order for the angular momentum to be conserved...at different points of the ellipse...when 'r'(distance from sun) increases, the linear velocity decreases....and we all know that a change in linear velocity is a linear acceleration!
so....where am i wrong????????

2007-02-18 23:53:53 · 4 answers · asked by vyaasgururajan 1

2007-02-18 23:36:30 · 6 answers · asked by anarchygirl 1

2007-02-18 23:31:48 · 5 answers · asked by anarchygirl 1

2007-02-18 23:24:53 · 3 answers · asked by virat 2

Apparantly its all around us, and ive seen the effects, like things move as if to be pulled by an invisible force, its been on tv loads of times so is it real?

2007-02-18 23:19:57 · 7 answers · asked by Fire Juggler 2

2007-02-18 23:17:09 · 3 answers · asked by Anonymous

using a magnet , more exactly, a certain pole: negative or positive, can you atract electrons or positrons?

electricity is the ordered movement of electrons, but magnetism what is it more exactly?

2007-02-18 23:14:25 · 1 answers · asked by erzebet 2

2007-02-18 23:13:30 · 1 answers · asked by Brilliant_Advisor 3

what is acceleration of light

2007-02-18 23:09:33 · 5 answers · asked by Anonymous

2007-02-18 21:57:26 · 3 answers · asked by ace 1

in 5 minutes answer

2007-02-18 21:53:32 · 3 answers · asked by ace 1

2007-02-18 21:44:43 · 2 answers · asked by lina k 1

PEgrav = mass * g * height
PEgrav = m * g * h
In the above equation, m represents the mass of the object, h represents the height of the object and g represents the acceleration of gravity (approximately 10 m/s/s on Earth).

I want to find out how many pounds of force there are behind a punch/kick...if i were using a weighted pendulum and based on how high it goes when you hit it, would this equation give me what i am looking for...if not what would?

2007-02-18 21:41:19 · 3 answers · asked by will_samp 1

t=pghr/2

2007-02-18 21:36:19 · 2 answers · asked by raghav m 1

2007-02-18 20:49:14 · 5 answers · asked by gAiL_17 1

(Refering to the two-slit experiment) How is it possible that a single photon can pass through both slits and interfere with itself? If it is because it is a wave of possibilities, how does it not ultimately choose one of those possibilites? How can a single thing be in more than one place at one time, an idea that seemingly contradicts logic itself?

Also, when an attempt is made to observe how this happens, the single photon does not behave in this manner, going through only one slit at a time. How is the photon's behavior changed by the mere act of observation? Does this experiment imply that light is somehow intelligent?

2007-02-18 20:42:36 · 4 answers · asked by thiefofsanity 2

2007-02-18 20:41:00 · 9 answers · asked by GilmourFrancis 3

A student stands at the edge of a cliff and throws a stone horizontally over the edge with a speed of 17.0 m/s. The cliff is h = 61.0 m above a flat horizontal beach.



How long after being released does the stone strike the beach below the cliff?
_____s
With what speed and angle of impact does the stone land?
_____m/s
_____° below the horizontal

2007-02-18 20:01:43 · 2 answers · asked by Erin C 1

Thanks for your answer...Tom Science 4

2007-02-18 19:59:22 · 3 answers · asked by Anonymous

Man is inventing & discovering many things. Can he win the war with time? I am not sure. But i 'm more than 100%sure that he can't capture GOD even 1%.
I am very eager to know about time reltivity. Please tell me what do u know my friend.May u live happy!

2007-02-18 19:51:37 · 5 answers · asked by Anonymous

2007-02-18 19:15:20 · 4 answers · asked by Anonymous

What if our world's length is about a few billions of years, but all the world, the beginning and the end, is just a few days old?

2007-02-18 19:13:20 · 5 answers · asked by spring 2

2007-02-18 19:03:08 · 5 answers · asked by MA LAI LI 2

1. A 10 kg bix,initially at rest, is pulled through a distance of 8 m across a level floor by a 10 N force applied parallel to the floor.The coeffcient of friction between the floor and the box is 0.25
a. what is the work done by the force ?
b. what is the work done by friction?
c. what is the network on the box?
d. what is the speed of the box at the end of 5 m?

2.Two bodies of masses 2 kg and 4 kg moving with velocities of 10 m/s, east and 20 m/s west respectively,collide head on.
a. what is the total momentum of the bodies before collision ?
b. if the collision perfectly inelastic,what is the velocity of the bodies after collision?
c. if the collision is perfectly elastic,what is the velocity of the 2 kg and 4 kg ball after collision?

please kindly help me with dis problem
a BIG THANKS

2007-02-18 18:37:23 · 3 answers · asked by ice_cream_chico 1

2007-02-18 18:28:50 · 4 answers · asked by Anonymous

An inventive child wants to reach an apple in a tree without climbing the tree. Sitting in a chair connected to a rope that passes over a frictionless pulley, the child pulls on the loose end of the rope with such a force that the spring scale reads 320 N. The child's true weight is 280 N, and the chair weighs 160 N.

(a) Show that the acceleration of the child-chair system is upward and find its magnitude.
___ m/s2
(b) Find the force the child exerts on the seat of the chair.
___ N

Thank you so much!

2007-02-18 18:11:18 · 4 answers · asked by Anonymous

Calculate the frequency, in hertz, of the photon that is emitted when a electron falls from level n = 9 to level n = 4 in the H atom.

2007-02-18 18:08:11 · 2 answers · asked by Anonymous

2007-02-18 18:07:26 · 10 answers · asked by xcaluber 1