Physics - March 2007

An indicator changes color when the acidity of a solution changes. What evidence is there that such a change took place?

2007-03-29 10:01:06 · 1 answers · asked by Lizzie 5

which means there are an infinite number of possibilities, then do you think there are an infinite number of you's and me's having this same conversation right now or has matter not yet reached the other dimensions for there to be the exact same connection?

2007-03-29 09:59:01 · 3 answers · asked by Anonymous

How fo you find the wavelength of a wave traveling at 3.26 E6 m/s with a period of 0.0125 s

2007-03-29 09:27:41 · 3 answers · asked by mac_addict 3

tom keeps raising the cover of a book until his 31 g eraser slides down. if the coefficeint of static friction between the eraser and text=1.6, find the maximum angle he can raise the cover until the eraser slides down.
the answer is 58degrees
thanks!!1

2007-03-29 09:14:51 · 1 answers · asked by surferr 1

2007-03-29 09:05:54 · 8 answers · asked by Lizzie 5

Ok! What happens when the slope (by with the ball rolls down, in my case it was a wooden plank) has been tilted over 45 degrees in angle. and the ball is put at the top of the slope and released to roll down? (remember the slope is over 45 degrs) and as u tilt the board/slope the ball starts simply starts rolling down the board, but actually with out any force acting on it. You know what i mean? ofcourse until the point of 'free fall' where the ball simply drops down with total gravity acting on it. but when its u know on a slope of say ..... 55 degrees or 70 degrees. what is actually happening? what do u call that?

2007-03-29 09:01:41 · 4 answers · asked by john_stephenraj2000 2

2007-03-29 08:32:11 · 4 answers · asked by cody link 1

The Sun delivers about 1126 W/m2 of electromagnetic flux to the Earth's surface.
Calculate the total power incident on a roof of dimensions 10m x 20m, assuming the radiation is incident normal to the roof. Answer in units of W.

2007-03-29 08:24:27 · 3 answers · asked by smb473 1

A Sytrofoam® ball covered with a conducting paint has a mass of 6.0 10-3 kg and has a charge of 3.0 µC. What electric field directed upward will produce an electric force on the ball that will balance its weight?

2007-03-29 08:07:11 · 2 answers · asked by Nate E 1

Consider three objects with the same temperature, but with radii of Bob = 1000 meters, Patrick = 2000 meters and Gary = 4000 meters. Which has the largest luminosity and which has the smallest? Why? How many times bigger is the largest luminosity than the smallest? What do we know about the color of the objects?

2007-03-29 08:04:55 · 1 answers · asked by Anonymous

Consider three objects with the same radii and temperatures, Bob = 2000 K, Patrick = 4000 K and Gary = 6,000 K. Which has the largest luminosity and which has the smallest? Why? How many times bigger is the largest luminosity than the smallest? What color is each object according to the temperatures listed?

2007-03-29 08:04:11 · 1 answers · asked by Anonymous

An electron is accelerated by a constant electric field of magnitude 280 N/C.
(a) Find the acceleration of the electron.
(b) Use the equations of motion with constant acceleration to find the electron's speed after 1.05 10-8 s, assuming it starts from rest.

2007-03-29 08:04:03 · 1 answers · asked by Nate E 1

2007-03-29 08:02:30 · 4 answers · asked by Gypsy Gal 6

2007-03-29 07:49:48 · 7 answers · asked by Jacqui H 1

2007-03-29 06:35:50 · 2 answers · asked by ssphotoshop 2

Two rays of light from the same source destructively interfere in their path lenghts differ by how much?

and I need to demonstrate the wave properties of light in the lab by using a slit film with different slit patterns with a range of widths, spacing, and number of slits. Before I go, I just want some ideas of how it's going to be resulted.

1)when two waves interact, do you end up with a larger amplitude wave, a small amplitude wave, or no amplitude?

2)What conditions d oyou need to make a larger amplitude wave?

3) what would show that light has wave properties?

4) Figure out, using geometrical arguments, whereyou should see bright spots and where you should see dark spots.

5) would the same concepts hold for sound waves and water waves?

2007-03-29 06:33:01 · 2 answers · asked by Anonymous

2007-03-29 06:16:51 · 5 answers · asked by Anonymous

A 54 kg skier coasts up a snow-covered hill that makes an angle of 25° with the horizontal. The initial speed of the skier is 5.2 m/s. After coasting a distance of 1.9 m up the slope, the speed of the skier is 2.5 m/s.

(a) Find the work done by the kinetic frictional force that acts on the skiis.
(b) What is the magnitude of the kinetic frictional force?

2007-03-29 05:53:37 · 1 answers · asked by buttrefly007 1

Please?? I try but I don't get it.

2007-03-29 05:31:52 · 9 answers · asked by Dovey 7

like fishing, napping etc, then he leaves the top of the mountain to come back down the next morning at 5am taking the same path back down and reaches the bottom at 5pm also making whatever stops along the way down, what are the odds that he will be at the exact same spot at the exact same time anywhere along the way as the day before?

2007-03-29 05:29:05 · 5 answers · asked by Anonymous

2007-03-29 04:08:54 · 2 answers · asked by drishani_saggi 1

2007-03-29 03:39:15 · 3 answers · asked by Anonymous

2007-03-29 03:37:42 · 3 answers · asked by Anonymous

2007-03-29 03:36:51 · 2 answers · asked by Anonymous

2007-03-29 03:34:48 · 3 answers · asked by Anonymous

2007-03-29 03:33:02 · 4 answers · asked by Anonymous

2007-03-29 03:31:53 · 1 answers · asked by Anonymous

2007-03-29 03:09:42 · 5 answers · asked by Anonymous

2007-03-29 02:58:08 · 2 answers · asked by thatsfunnybunny 2

I know that it will explode but why does that happen?

2007-03-29 02:55:56 · 9 answers · asked by deadly_plague101 1