Physics - March 2007

2007-03-04 01:13:56 · 16 answers · asked by j y 2

2007-03-04 01:11:59 · 2 answers · asked by luc_bugeja 1

My 7th grade daughter came home and announced that they do not move..Now I am fairly knowledgeable in astronomy so I know all about the earths rotation when viewing night sky objects but I never thought about the clouds being still..What do you all think is she right or wrong?

2007-03-04 01:08:25 · 13 answers · asked by Jenny T 4

2007-03-04 01:01:36 · 1 answers · asked by Sajjad Ali Memon 1

2007-03-04 00:51:38 · 8 answers · asked by cobra sly 1

2007-03-04 00:28:34 · 4 answers · asked by ayob 2 1

2007-03-04 00:26:35 · 3 answers · asked by Kelly C 1

What is the difference between primary and secondary rainbows in the rain droplets with respect to :

Angular size,
Color ordering,
Number of internal reflections

thanks

2007-03-04 00:14:38 · 2 answers · asked by Anonymous

2007-03-03 23:58:40 · 2 answers · asked by Anonymous

A head on collision between two cars of equal mass each going 80 m/s or a collision between the same two cars, one stationary and the other going at 160 m/s? My hunch is the collision between the car going 80 m/s and the stationary car. I am curious to know because the total kinetic energy of the system in the head on collision seems to be m*80^2 and the total kinetic energy in the other case seems to be m*160^2

2007-03-03 23:50:09 · 3 answers · asked by z_o_r_r_o 6

2007-03-03 23:40:22 · 1 answers · asked by rohit_gupta322 2

best answer will be given ASAP

2007-03-03 23:29:29 · 1 answers · asked by Samlovesjesea 1

*weight of body is more at poles and less at equator.
*why is it dangerous to jump out of moving bus?
*rolling friction is less than sliding friction
*steam 100 degree C produces more severe burns then water at 100 degree C..
*a needle sinks while ship floats.
*the explosions produced in sun are not heard.
*it is difficult to start fusion reaction..

if u know even a single reason do post.serious answers only.abuse will be reported.

2007-03-03 23:15:41 · 3 answers · asked by d♥n't y♥u dare try t♥ add me 2

2007-03-03 22:59:27 · 6 answers · asked by Sajjad Ali Memon 1

I live in Sub-Sahara Africa. This phenomenon is frequent. The refrigerator temperature is standard (in °C) so the water is NOT frozen. The water is cool, not ice cold when taken from the fridge. The ambiant temperature is "normal" for this region of Africa (in °C not F). Thank you very much, Sarah

2007-03-03 22:57:28 · 1 answers · asked by srhappy 1

2007-03-03 22:44:09 · 3 answers · asked by scorpiangrl055 1

living plants and trees absorb carbon dioxide which contains a small amount of radioactive carbon-14 which has a half-life of 5600 years. when the plant dies, the proportion of radioactive C to non-radioactive C in the plant decreases as the C-14 decays. the activity of a living plant is 15 Bq for each gram of carbon. if the activity of a piece of wood containing 4g of carbon is 30Bq, how old is the wood?

please help.. i'm very confused

2007-03-03 22:31:02 · 3 answers · asked by cutie 1

2007-03-03 22:12:24 · 8 answers · asked by James 1

hmmm

2007-03-03 21:59:44 · 10 answers · asked by James 1

2007-03-03 21:02:59 · 7 answers · asked by jaw 2

2007-03-03 20:54:46 · 10 answers · asked by Anonymous

2007-03-03 20:44:19 · 7 answers · asked by Anonymous

a disscussion started at work one day when a aircraft flew over and i happend to comment that i thougt thrust was keeping it up. The others argued that it was the wings.I dissagreed saying that the wing was only helping to reduce the amount of thrust needed and gave a example of throwing a stone saying it would stay in the air indefinitly if the thrust was great enough and a stone has not got wings . can someone please help us all become friends again and settle this

2007-03-03 20:43:50 · 20 answers · asked by Anonymous

it seams so DUMB to me! I mean all that would happen is you wouldnt be able to see anything is the opposite dirrection than your going!

2007-03-03 20:38:03 · 7 answers · asked by James 1

Do you think it's possible to see the laser light if pointed to outer space? Like for example, the guys up there in the shuttle, do you think they could see the light from the laser pointer if we pointed it straight up?

2007-03-03 20:28:45 · 7 answers · asked by Anonymous

Electrons of kinetic energy 10eV travel a distance of 2 km. if the size of the initial wave packet is 10^-9 m, estimate the size at the end of their travel

2007-03-03 20:20:37 · 1 answers · asked by hayat a 1

It has been argued that power plants should make use of off-peak hours (such as late at night) to generate mechanical energy and store it until it is needed during peak load times, such as the middle of the day. One suggestion has been to store the energy in large flywheels spinning on nearly frictionless ball-bearings. Consider a flywheel made of iron, with a density of p, in the shape of a uniform disk with a thickness of L.

A.)What would the diameter of such a disk need to be if it is to store an amount of kinetic energy of E when spinning at an angular velocity of w about an axis perpendicular to the disk at its center?


B.) What would be the centripetal acceleration of a point on its rim when spinning at this rate?

2007-03-03 20:02:28 · 1 answers · asked by squishy 1

It is just like a pad where human has to touch the pad and he can realise certain sence like water, rough surface,fire, cool , hot ,soft etc.

2007-03-03 19:41:44 · 2 answers · asked by sunil n 2

curious,work wit me on thiswat about a cotton ball

2007-03-03 19:03:16 · 8 answers · asked by Book of Changes 3

2007-03-03 18:53:09 · 16 answers · asked by Anonymous