Physics - September 2007

2007-09-13 06:54:08 · 5 answers · asked by Anonymous

2007-09-13 06:49:53 · 8 answers · asked by Anonymous

i a trying to write a research paper on higher dimension, what kind of argument can i give.
any sample paper which fits my level i.e. freshman college compostion..
thankx

2007-09-13 06:40:21 · 5 answers · asked by eminent_youtom 1

Everyone loves to talk about gravitational waves, but it's just too weak of a force and too tied up with our sense of space-time to really be measured...

So has anyone really done measurements on the propagation of large-scale changes of a straight electric/magnetic field?

In my sillyness I imagine some scientist in the pacific ocean turning some massively strong electromagnet on and off @ a predetermined frequency and some other scientist sitting in the atlantic ocean with some incredibly delicate and sensitive field indicator expecting to measure disturbances at the predetermined frequency by some time offset that hopefully makes sense given all that we know about field interaction and relativity.

Tried to find information on this through normal noob-y means (wiki, google) and failed so I ask here.

2007-09-13 05:36:08 · 5 answers · asked by Robert B 1

How do i find the answer and what is the answer to "A soccer player kicks the ball giving it a speed of 76.2 km/h. If the ball travels in a straight line parallel to the ground, how long does it take the ball to reach another player 61.3 m away?"

2007-09-13 04:24:21 · 3 answers · asked by XLR8 2

2007-09-13 03:45:46 · 3 answers · asked by Anonymous

An arrow is shot at an angle of 45 degrees above the horizontal. The arrow hits a tree a horizontal distance 220m away, at the same height above the ground as it was shot. Use 9.8m/s for the magnitude of the acceleration due to gravity. someone drops an apple from 6m, how long after the arrow is shot should the apple be dropped in order for the arrow to hit the apple?

2007-09-13 02:42:29 · 1 answers · asked by Anonymous

2007-09-13 02:36:24 · 6 answers · asked by Anonymous

Nobody here knows the answers.

2007-09-13 01:57:38 · 2 answers · asked by Anonymous

pls give me links where i can find some reliable answers.

2007-09-13 01:56:46 · 1 answers · asked by cuteness 1

The standards for the kilogram are drifting apart. Why is this happening?


http://news.yahoo.com/s/ap/20070912/ap_on_re_eu/shrinking_kilogram

2007-09-13 00:27:34 · 3 answers · asked by Sopwith 4

well...did he? (my hw pls help)

2007-09-13 00:24:38 · 5 answers · asked by skullprince5 1

2007-09-13 00:24:00 · 7 answers · asked by Anonymous

2007-09-13 00:02:31 · 4 answers · asked by WhydoIdothis 3

explain neglecting friction and taking into account the time of operation of the engines.

2007-09-12 23:40:33 · 2 answers · asked by daineyjinh 1

If electrons constantly vibrate(uncertainty principle), and since moving charges emit photons (from the virtual photons left behind), shouldn't all electrons be constantly giving "free" energy?

2007-09-12 23:40:32 · 3 answers · asked by worried person 1

2007-09-12 23:39:52 · 6 answers · asked by mesun1408 6

we have this project to gather information and stuff about this topic...does anybody know how to or what kind of experiment do i need to do..?? please... or could you give any info about the experiment... i think it doesn't loss mass if you include the gases or soot that it produce when lighted..

2007-09-12 23:24:56 · 4 answers · asked by Ren2x 2

I would like to ask how to have a reverse rotation, but the forward rotation still be active... For instance forward rotation will take place at sometime, then after 5 hours reverse rotation will take place... vice versa...

How can I do this?

2007-09-12 22:49:14 · 5 answers · asked by ken p 1

just a short expaination needed?

2007-09-12 20:58:53 · 2 answers · asked by Anonymous

Can someone help me with this revision question before i do my exam?

I only need pretty basic answers no more than a paragraph.

2007-09-12 20:11:10 · 1 answers · asked by Anonymous

By how much does the speed of a vehicle moving in a straight line change each second when it is acceleration at 2 km/h.s? At 4 km/h.s? at 10km/h.s?

2007-09-12 19:54:14 · 2 answers · asked by cocomademoiselle 5

A student who weighs 530 N is wearing a backpack that weighs 84 N. The student is standing still on level ground. Give your answers to the following questions in Newtons.
a) What is the magnitude of the net force on the student?
b)What is the magnitude of the contact force on the student by the backpack?
c) What is the magnitude of the contact force on the student by the ground?

2007-09-12 19:47:26 · 4 answers · asked by ariddlegirl 1

The graph of , is reflected in the x axis and shifted to the left 3 units and up 4 units. What is the equation of the new graph?

2007-09-12 19:22:30 · 1 answers · asked by yourdaddy 2

2007-09-12 18:13:31 · 1 answers · asked by uncleclover 5

ok so ike we did this experiment when u have to watch the shadow of a circle until it moves a complete diameter. the time we got was 3:37 (minutes). and were supposed to assume that the moving one diameter is equal to .5 degrees.
the formula were supposed to use is time/.5 degrees x 360 degrees/1 rotation.
we ended up with 43.4. is that right? what did we do wrong?

and for linear speed, the equation is d/t = 2pi r /hours. the earth to sun distance is 149.6 x10 exponent 6 km. raduis of the earth is 638 x 10 exponent 3 km.

does anyone know how to do this?
thankkkss sooo much if u do.

2007-09-12 18:12:09 · 3 answers · asked by nikijoe46 3

2007-09-12 17:58:51 · 2 answers · asked by Anonymous

A river flows due south with a speed of 2.00m/s . A man steers a motorboat across the river; his velocity relative to the water is 4.20m/s due east. The river is 800m wide.
What is the magnitude of his velocity relative to the earth? What is the direction of his velocity relative to the earth? How much time is required for the man to cross the river?

2007-09-12 17:45:24 · 1 answers · asked by Anonymous

a(with arrow pointing to left on top)=(4.0m)i - (3.0m)j + (1.0m)k
b(with arrow pointing to left on top)=(-1.0m)i+(1.0m)j+(4.0m)k.

In unit-vector notation, find (a) a + b, (b) a - b and, (c) a third vector c such that a - b + c = 0.

Please explain with the answer so that i understand the process rather than just get the answer. Thanks! xoxo

2007-09-12 17:11:37 · 1 answers · asked by laureni 1

2007-09-12 16:45:18 · 6 answers · asked by Anonymous