Physics - June 2007

I have a list of positions (about 22 in (x,y,z)), and what I would like to know is if i used the distance equation for finding the distance between two charges would that suffice as my r. I have 22 charges and 22 different positions (x,y,z), will this work?

2007-06-01 17:40:02 · 1 answers · asked by Nate-dawg 2

2007-06-01 16:44:35 · 11 answers · asked by dave777 4

As we all know, fusion power always seems 20 years off from anything workable (let alone "breaking even"). However, at least twice (were there more?) folks have claimed to find a way of fusing H atoms in some sort of dense matrix. I assume the Utah Institute never worked out. What about using the extreme heat of bubble formation and collapse in cavitation? Was it in acetone or some such organic liquid? Curious how this all came out. Anyone know?

2007-06-01 16:24:37 · 5 answers · asked by BandEB 3

This is a term of Physics

2007-06-01 15:15:55 · 7 answers · asked by anoop v 2

When a highly coherent beam of light is directed against a very fine wire, the shadow formed behind it is not just that of a single wire but rather looks like the shadow of several parallel wires. The explanation of this involves:

a) refraction
b) diffraction
c) reflection
d) Doppler effect
e) an optical illusion

2007-06-01 14:49:24 · 5 answers · asked by mary j 1

i'm confused

2007-06-01 14:16:32 · 3 answers · asked by Anonymous

According to a rule of thumb, every five seconds between a lightning flash and the following thunder gives the distance of the storm in miles. Assuming that the flash of light arrives in essentiall no time at all, estimate the speed of sound in m/s from this rule.

2007-06-01 14:05:54 · 4 answers · asked by Anonymous

(a) cont... A charge of q=+7.65 micro coulomb is located in an electric field. The x & y components of the electric field are Ex= 6.41x10+3 N/C & Ey= 8.33x10+3 N/C, respectively.
Also determine the angle that the force makes with the +x axis

(b) An electron is released from rest at the negative plate of a parallel plate capacitor. The charge per unit area on each plate is 1.63x10-7 N/m^2, & the plates are separated by a distance of 1.44x10-2 m. How fast is the electron moving just before it reaches the positive plate?

(c) A small plastic ball of mass 6.20x10-3 kg & charge +0.19 micro coulomb is suspended from an insulating thread & hangs between the plates of a capacitor. The ball is in equilibrium, with the thread making an angle of 30º with respect to the vertical. The area of each plate is 0.0128m^2. What is the magnitude of the charge on each plate?

2007-06-01 13:00:56 · 2 answers · asked by Brandy J 1

Human body sweats a lot more when we run upstairs,
than when we run downstairs.

What upper limit of efficiency of muscles does this fact imply?

2007-06-01 11:57:45 · 4 answers · asked by Alexander 6

A lunch tray is being held in one hand, as the drawing illustrates. The mass of the tray itself is 0.200 kg, and its center of gravity is located at its geometrical center. On the tray is a 1.00 kg plate of food and a 0.165 kg cup of coffee. Obtain the force T exerted by the thumb and the force F exerted by the four fingers. Both forces act perpendicular to the tray, which is being held parallel to the ground.
T =________ N (downward)
F = ________N (upward)


http://www.webassign.net/CJ/09_68.gif

2007-06-01 11:17:20 · 1 answers · asked by Anonymous

Jake who has a mass of 100 Kg runs up the flight of stairs at the stadium, ending up 40cm higher than his starting position. All of this is done in a remarkable time of 14.6 secs. What is his power output in watts? what is it in horsepower? If he is only 20% efficient how much energy in Joules did he expend?

2007-06-01 11:12:02 · 2 answers · asked by Anonymous

A glass bottle of soda is sealed with a screw cap. The absolute pressure of the carbon dioxide inside the bottle is 1.65 105 Pa. Assuming that the top and bottom surfaces of the cap each have an area of 4.25 10-4 m2, obtain the magnitude of the force that the screw thread exerts on the cap in order to keep it on the bottle. The air pressure outside the bottle is one atmosphere.
_____N

2007-06-01 11:08:09 · 1 answers · asked by Anonymous

Have about a 60 ft drop from my spring to the house and about a 600 ft.run with inch and a half poly pipe.I get around 25lb psi.If I increased the pipe size to say 4 inch would that give me more psi. Booster pump out of the question as I am off the grid.

2007-06-01 10:46:52 · 11 answers · asked by sawdust552001 2

2007-06-01 10:46:07 · 5 answers · asked by Anonymous

I was wondering.....

What happens to magnetic and electric feilds near the speed of light? in theory?

2007-06-01 10:22:03 · 7 answers · asked by Anonymous

The bricks are stacked on top of each other on the edge
of a cliff, no glue. Each brick has dimensions 2" x 5" x 10"

Think a stack of books.

2007-06-01 10:11:46 · 2 answers · asked by Alexander 6

2007-06-01 09:37:18 · 7 answers · asked by Ryan 1

One end of a wire is attached to a ceiling, and a solid brass ball is tied to the lower end. The tension in the wire is 110 N. What is the radius of the brass ball with the answer in m? Brass is 8470 p(kg/m^3)

Please provide the answer with the steps

2007-06-01 09:34:23 · 3 answers · asked by Anonymous

Two thin rectangular sheets (0.17 m 0.41 m) are identical. In the first sheet the axis of rotation lies along the 0.17 m side, and in the second it lies along the 0.41 m side. The same torque is applied to each sheet. The first sheet, starting from rest, reaches its final angular velocity in 8.5 s. How long does it take for the second sheet, starting from rest, to reach the same angular velocity?

2007-06-01 08:53:16 · 1 answers · asked by =] 1

2007-06-01 08:17:17 · 6 answers · asked by Anonymous

Assume a class 3 storm and an airburst at 5,000 feet.

2007-06-01 07:53:53 · 11 answers · asked by Ed D 2

I need to know a formula that can estimate horsepower if given the time it takes to cover a given distance, measured in feet. The formula needs to be for any distance (not just the quarter mile....the distnance needs to be a variable in the equation).

2007-06-01 07:37:18 · 1 answers · asked by Anonymous

On a safari, a team of naturalists sets out toward a research station located 4.1 km away in a direction 42° north of east. After traveling in a straight line for 2.6 km, they stop and discover that they have been traveling 28° north of east, because their guide misread his compass. What are the magnitude and direction (relative to due east) of the displacement vector now required to bring the team to the research station?

2007-06-01 07:36:12 · 3 answers · asked by M&M 2

I challenge the intelligent Yahoo community to answer this question....Is the length of the day affected when travelling on a jetliner? Assume that the starting point and the end point of the trip are on the same lattitude.

2007-06-01 06:58:44 · 6 answers · asked by Joline 6

Instead of transparent film

2007-06-01 06:45:13 · 3 answers · asked by Alexander 6

We did a lab proving the conservation of thermal energy using a calorimeter. Our objective was that the heat lost by hot water was the heat gained by the cold water. My group got 20% error!! What are the possible sources of it?

2007-06-01 06:06:22 · 3 answers · asked by Anonymous

Hi guys. Tomorrow in my school i have to make an exposition about my Physics project, a Balsa wood cable-stayed bridge. There is a question I couldn't solve, here it is:

What are the real applications of systems of equations?

I really need to solve this question. If you have an answer you'll be helping me a lot.

THX!

2007-06-01 06:04:52 · 1 answers · asked by JMG 2

The condition of apparent weightlessness for the passengers can be created for a brief instant when a plane flies over the top of a vertical circle. At a speed of 215 m/s, what is the radius of the vertical circle that the pilot must use?

2007-06-01 05:54:42 · 3 answers · asked by gurlie2 1

radio waves are lower in frequency, longer in wavelength, and have their own intrinsic set time period (1/frequency). How can light waves and radio waves both travel at 186,000 miles/second?

2007-06-01 05:37:12 · 9 answers · asked by Bob D1 7

What would the graph of veloicty vs. time look like for a glider on a level air track? I appreciate your time and insight in this manner. God Bless

2007-06-01 05:29:15 · 1 answers · asked by Anonymous