Physics - December 2006

A racing car moving with constant acceleration covers two successive kms in 30sec
& 20sec respectively.What is the acceleration of the car?

2006-12-04 20:35:17 · 3 answers · asked by Anonymous

Magnetic force is the key simple but no has done it magnetic force repels to create rotation if applied right the force could be harnessed to create rotation this constant frictionless rotation could be used with simple coils for electricity. This would be perpetual motion no outside energy required its like using gravity
minimal outside or no outside help would be required. Give me ideas if you think your smart?

2006-12-04 20:20:27 · 8 answers · asked by Anonymous

2006-12-04 20:13:13 · 9 answers · asked by Mysterious 3

Magnteic force is the answer for constant rotation. Rotation applied
in a large facilty using magnets materials coils could produce electricty at an alarming rate. frictionless energy would result. Magnets repel to create rotation static charge using coils wouls produce electricty lubrication could minimize friction between coils
result contant energy proudction with no extrenal power source.

2006-12-04 20:12:40 · 4 answers · asked by Anonymous

give some good examples

2006-12-04 19:23:09 · 7 answers · asked by Anonymous

2006-12-04 18:42:28 · 3 answers · asked by Curious 1

2006-12-04 18:15:46 · 1 answers · asked by bhupesh g 1

A car is traveling at 50.0 km/h on a flat highway. If the coefficient of friction between road and tires on a rainy day is 0.100, what is the minimum stopping distance in which the car will stop? What is the stopping distance on a dry day when the coefficient is 0.600?

2006-12-04 18:11:36 · 6 answers · asked by billf39 2

2006-12-04 18:09:41 · 5 answers · asked by prashant s 1

The star has a mass 3.35×10^5 times that of the planet, which orbits this star. For a person on the planet, the average distance to the center of the star is 2.39×10^4 times the distance to the center of the planet.

In magnitude, what is the ratio of the star's gravitational force on you to the planet's gravitational force on you?

2006-12-04 18:00:05 · 6 answers · asked by Anonymous

2006-12-04 17:50:51 · 5 answers · asked by kafka 1

A cannon is fired over level ground at an angle of 30 degrees to the horizontal. The initial velocity of the cannonball is 400 m/s, but because the cannon is fired at an angle, the vertical component of the velocity is 200 m/s and the horizontal component is 346 m/s.

a) How long is the cannonball in the air? (Use g= 10 m/s^2 and the fact that the total time of flight is twice the time required to reach the high point.)

b) How far does the cannonball travel horizontally?

c) Repeat these calculations, assuming that the cannon was fired at a 60 degree angle to the horizontal, resulting in a vertical component of velocity of 346 m/s and a horizontal component of 200 m/s. How does the distance traveled compare to the earlier result?

I feel like I know how to do this, but I am constantly not sure. To find time for part a, do you use the formula t=square root of 2 times the height divided by the gravitational acceleration?

2006-12-04 17:46:11 · 4 answers · asked by Anonymous

2006-12-04 17:44:01 · 0 answers · asked by Anonymous

I found this question posted on a message board, not by me.

Image a force, this force can only go in 1 direction, it is in space and most importantly, its unstoppable. Then theres a wall its also in space, this wall cannot be moved, cannot be bent, stretched, cut, broken through, teleported, destroyed, even if hell broke out and tried to suck it in! WHAT WOULD HAPPEN IF THEY MET?

My answer is simple....These 2 entities cannot exist in the same universe under these conditions.

Any thoughts?

2006-12-04 17:42:25 · 3 answers · asked by Chris R 1

I'm a student looking for a fairly accurate pendulum for measuring inertial properties

2006-12-04 17:15:14 · 1 answers · asked by Elizabeth D 1

I thought that smoke was composed of miniscule particles of the burning material. This should make them heavier than air, and they should drop.

2006-12-04 17:07:17 · 7 answers · asked by bettysdad 5

No variables, just 2 guns fired at the same rate at different angles.

2006-12-04 16:59:04 · 8 answers · asked by jeremy b 1

A convex spherical mirror with a radius of curvature of 17.0 cm produces a virtual image one half the size of the real object. Where is the object?
cm (from the mirror)

2006-12-04 16:55:56 · 4 answers · asked by rhondasumpter 2

What is the best way to suspend animation?

Freezing destroys cells, and nothing else seems to work.

How can I cheat death?
(I owe him money...)

2006-12-04 16:43:02 · 20 answers · asked by Kalsin C 2

25g cube of Al is heated to 150c and then added to 100g of water at 25c.
( sp. Heat of Al= 0.22 cal/g C )

2006-12-04 16:32:40 · 2 answers · asked by Peter T 1

I have a love for history, but I really like to go back and study several people and the periods in which they lived.

I am asking (though due to improbablity I may not but,) if possible can someone like me (who desires to see the past and record it for the sake of humanity and future generations) have the right and will to ask for such a thing like time travel?

Or am I selfish to ask?...
Perhaps too stupid for science fiction nonsense... *sigh*

2006-12-04 16:31:34 · 7 answers · asked by Kalsin C 2

2006-12-04 16:31:08 · 4 answers · asked by karl k 6

In a 45.0g brass calorimeter and 200g of silver at 1000.0 c

( sp.heat of brass =0.0917 cal/g c )
( sp.heat of silver = 0.0562 cal/g c)

2006-12-04 16:27:50 · 1 answers · asked by Peter T 1

2006-12-04 16:21:13 · 3 answers · asked by Peter T 1

2006-12-04 15:59:53 · 16 answers · asked by chris c 2

In a particle accelerator, an electron beam can be shot at particles of elements that are speeding at near the speed of light. These particles usually become two gamma ray photons...but, how long do those newly formed particles last?

2006-12-04 15:38:42 · 1 answers · asked by Kolinahr7 1

A bird on a power line does not shock because electricity follows the shortest route...... but the Earth is also suspended in space so why does it flow towards the Earth through my body if I touch the wire while standing on the Earth?

2006-12-04 15:12:39 · 4 answers · asked by Willem V 3

It explains what we need to know, but should every text book state

“This textbook contains material on Gravity. Universal Gravity is a theory, not a fact, regarding the natural law of attraction. This material should be approached with an open mind, studied carefully, and critically considered.”?

http://www.bringyou.to/apologetics/p67.htm

2006-12-04 15:06:57 · 13 answers · asked by Anonymous

One cord makes the angle = 36.9 with the vertical; the other makes the angel = 53.1 with the vertical. If the length l of the bar is 6.10m, compute the distance x from the left end of the bar to its center of mass.

Answer:2.20m

I don't know how they got this if you can please show me how.

2006-12-04 15:06:46 · 1 answers · asked by gods1princesschanel 1

2006-12-04 14:58:43 · 6 answers · asked by E A 1