Physics - July 2007

2007-07-15 01:14:40 · 3 answers · asked by mohan rao kotari k 2

2007-07-15 00:41:49 · 7 answers · asked by windjammer_ph 2

what objects demonstrate UAM?

2007-07-15 00:04:25 · 5 answers · asked by lei 1

2007-07-14 23:39:21 · 3 answers · asked by Lhyss 1

2007-07-14 23:35:34 · 6 answers · asked by Anonymous

Just a curious question my dad asked me to find an answer on here.

2007-07-14 23:12:59 · 19 answers · asked by magnaflo 1

This is similar to a question I posted previously; but hopefully this version is stated more clearly. I know the answer, but the best response deserves 10 pts. anyway.

Two spaceships pass each other at a relative speed of 1/2 c. At the moment they cross paths, they each synchronize their on-board clocks to read "12:00 PM."

The captain of Ship "A" knows that when his own clock reads "1:00", it's only 12:52 on Ship "B", due to time dilation. He can prove this by sending a signal to Ship "B" asking what time it is (and then accounting for the time it takes for the signal to return).

But the captain of Ship "B" knows that when his own clock reads "12:52", it's only 12:45 on Ship "A", due to time dilation. He can prove this by sending a signal of his own.

So here's the question: When it's 12:52 on Ship "B", what time is it on Ship "A"?

2007-07-14 22:12:38 · 6 answers · asked by RickB 7

"Block A, with a mass of 35 kg, rests on a 65o incline. The coefficient of kinetic friction is μk = 0.3. An attached rope is parallel to the incline and passes over a massless, frictionless pulley at the top of the plane. Block B, with a mass of 9 kg, is attached to the dangling end of the rope. What is the acceleration of block B? Define down as the -y direction."
My solution was -2.0 m/s^2 but I got wrong. please help me!

2007-07-14 21:09:29 · 3 answers · asked by Anonymous

I have 2 Questions, feel free to answer if you'd like. All help is appreciated. Unfortunately, I can only choose one best answer.

QUESTION ONE:
Two point charges, q1 = +20.0nC and q2 = +10.0 nC, are located on the x-axis at x = 0 and x = 1.00 m, respectively. Where on the x-axis is the electric field equal to zero?

QUESTION TWO:

Two point charges, q1 = +20.0nC and q2 = +10.0 nC, are located on the x-axis at x = 0 and x = 1.00 m, respectively. What is the magnitude of the electric field at the point x = 0.50 m, y = 0.50 m?

Once agian, ANY Help is appreciated! Thanks to those who take the time to help! :)

2007-07-14 19:50:43 · 2 answers · asked by Anonymous

2007-07-14 19:41:36 · 1 answers · asked by Failure 2

Two equal positive charges are separated by a distance 2a. For what value of y is the force on a charge Q is placed at point p maximum?
ans- y sq.rt2/2

2007-07-14 19:07:52 · 1 answers · asked by Anonymous

A delivery man travels 50m north, 40m east, 20m south and then takes elevator 50 m up in the building. What is his final displacement from the origin?
ans-50 *1.414=70.7

2007-07-14 18:57:05 · 3 answers · asked by Anonymous

No hints....THINK!

2007-07-14 18:01:18 · 6 answers · asked by andyg77 7

Why must the mercury bulb of the thermometer not touch the walls of the container(ex. beakers, test tubes...) when measuring the temperature of a liquid that is being heated?

Well, i mean it is inevitable right?

2007-07-14 16:39:17 · 4 answers · asked by Anonymous

.. or contrariwise the profusion of fusion, and the demission of fission?

(10pts if you can do worse...)

2007-07-14 16:04:09 · 1 answers · asked by smci 7

You are riding a bicycle aross a field when lightning strikes the field. Will you get electrocuted due to your bicycle's metal frame? Will the rubber tires insulate you from the intense shock? Or, is there some other reason why you will or will not get toasted?

2007-07-14 14:44:16 · 6 answers · asked by Anonymous

must provide detailed scientific reasoning

2007-07-14 14:37:32 · 7 answers · asked by Steve25e 1

in the guiness book of world records the quietest place on the earth was -0.98 decibals? how can that happen?

2007-07-14 14:20:02 · 4 answers · asked by i_am_not_a_french 3

i heard about it before althought i think its stupid.is it true?

2007-07-14 12:33:31 · 4 answers · asked by Anonymous

1) What are the possible combinations ?
And
2) If our human population exceed this amount would it be possible to have identical humans who are not related ?

2007-07-14 12:26:11 · 5 answers · asked by DeclanTynan 1

How did math turn out to be like it today,how can it be use to solved or invent things?

2007-07-14 11:34:04 · 5 answers · asked by Anonymous

There is plenty more evil in the world then good. No science has been able to even explain the rise of Naziism. Even caos theory only explains the balance of matter, not the inter-relationship between people and events. Under random chance something bad is more likely to happen to you then something good.

2007-07-14 11:27:20 · 10 answers · asked by wisemancumth 5

You are driving your car on a straight level road and slam on your brakes and skid to a stop over a distance of 20m(your car doesn't have anti-lock brakes). If you had been traveling twice as fast, what distance would be required to stop your car under the same conditions?

a) 28m
b) 30m
c) 40m
d) 60m
e) none of the above

2007-07-14 11:12:20 · 7 answers · asked by Anonymous

2007-07-14 10:55:05 · 16 answers · asked by John S2005 3

An ice skater is spinning in place(doing pirouette) and increases his rate of rotation by a factor of 2 by pulling his arms in against his body and reducing his moment of inertia. Which of the following statements correctly describes his rotational kinetic energy?

a) his rotational kinetic energy is zero
b) his rotational kinetic energy remains constant and not zero.
c) his rotational kinetic energy increases by a factor of 2
d) his rotational kinetic energy increases by a factor of 4
e) none of the above.

2007-07-14 10:05:38 · 5 answers · asked by Anonymous

2007-07-14 09:46:25 · 4 answers · asked by nasser a 2

The glass filters that are being set up om the PC screensagainst the harmful Radiations by coming toward our eyes work on the principal on the principal they have have meant to be worked.????

2007-07-14 09:18:34 · 2 answers · asked by Dawood Munir 1

and you can choose gods power, black hole power, gravity power, or unlimeted power and the maximum degrees of whatever element you choose is 4000 and not unlimited. and you can only choose up to 2 powers and one weapon (and no that weapon can not be some "ulta powerful weapon" or something of unlimetedness unless its a machine gun)

2007-07-14 09:16:07 · 15 answers · asked by mike 2

Okay im 20 years old....got into a lot of debt, lost my house car, feancee and am now living with grandparents, I work at lowes for 8 bucks an hour. Im really getting tired of this. I have quite a bit of knowledge in many areas. I want to have an excellent career as a scientist. Have i screwed up my life to much for that to be possible now? If not then what do i do?

2007-07-14 07:31:47 · 9 answers · asked by Anonymous

The visible spectrum of hydrogen can be described accurately with an empirical formula found by the Swiss teacher Johann Balmer in 1885. This formula, which gives the wavelength of a spectral line as a function of an integer quantity n, describes the spectrum known as the Balmer series. By varying n, you can calculate the wavelength of all spectral lines.
Part A
Find the minimum value of n in the Balmer series for which the predicted wavelength is in the ultraviolet region of the spectrum.

2007-07-14 07:04:15 · 1 answers · asked by Anonymous