Physics - October 2007

Is it because the brain prosseses information faster or cause it only prosseses vital information?

2007-10-31 06:17:37 · 10 answers · asked by Asklar 1

2007-10-31 06:12:27 · 4 answers · asked by Anonymous

I read somewhere that clocks on top of sky scrappers experience a deviation from those on the ground, due to less gravity effecting space/time.

Is this true? Is time faster or slower in the absence of gravity?

2007-10-31 05:26:57 · 4 answers · asked by Fred Head 4

2007-10-31 04:34:42 · 6 answers · asked by Anonymous

Could a realy fat guy have his own visible gravitional pull

2007-10-31 04:05:55 · 4 answers · asked by Mark 2

According to the second law of thermodynamics, entropy of a system can decrease only if useful energy is transferred into the system from outside the system. In a system which is somehow created without an investment of external useful energy, disorder will be at a maximum.

Now let's look at the entire physical universe. The high degree of orderliness in the universe can be made possible only through the transfer of useful energy into the physical universe from outside the physical universe.

Those who are not willing to accept the existence of God or of an "Intelligent Designer" outside the physical universe, are in effect saying that there is no source of such useful energy outside the physical universe. According to them, all energy sources for the orderliness in the universe are inside the universe. This would be a violation of the second law of thermodynamics, and, therefore, contrary to the laws of physics.

(Looking for answers from physicists who really understand the subject)

2007-10-31 03:40:20 · 7 answers · asked by brandlet 2

At a ball game, consider a baseball of mass m=0.15 kg that falls directly downward at a speed v=40 m/s into the hands of a fan. What impulse Ft must be supplied to bring the ball to rest? If the ball is stopped in 0.03 s, what is the average force of the ball on the catcher's hand?

2007-10-31 03:19:31 · 7 answers · asked by Anonymous

I need to find Radial, Tangential components of acceleration in nonuniform circular motion in 2-D & 3-Dimensionals?

2007-10-31 03:18:00 · 1 answers · asked by {A} Arsalan 1

When you hold two magnets close together they bond.

However when you move these magnets around each other there seems to be some resistence between them.

Could any boffins tell me what causes this and also what it is called?

Thanks

2007-10-31 03:16:41 · 5 answers · asked by davie 2

2007-10-31 02:35:59 · 7 answers · asked by brownie 2

its a bit like our brief life,a brief period of light and then back into eternal darkness,to be seen no more.out,out brief candle,life is a walking shadow!!

2007-10-31 02:23:59 · 2 answers · asked by Anonymous

A ball is projected horizontally from the top of a building. One second later, another ball is projected horizontally from the same point with the same velocity. At what point in the motion will the balls be closest to each other?
Will the first ball always be traveling faster than the second ball?
yes
no

What will be the time difference between them when the balls hit the ground?
no time difference
between one and ten seconds
one second
it depends on the height of the building

Can the horizontal projection velocity of the second ball be changed so that the balls arrive at the ground at the same time?
yes
no
Explain.

2007-10-31 01:45:49 · 3 answers · asked by wmartine 1

Rating=10W and Relative speed of flow = .Half as as 5W oil and second Rating=15W and..... Relative speed of flow = .Half as fast as 10W oil...........and third Rating =20W and Relative speed of flow= Half as fast as 15W oil.........According to the table above,car engine oil with a rating of 5W flows how many times as fast as car engine oil with a rating of 20W?please explain in detail.

2007-10-31 01:31:23 · 4 answers · asked by amjad 1

2007-10-31 01:09:54 · 3 answers · asked by suppajam 2

2007-10-31 00:18:27 · 17 answers · asked by timelord 1

What kind of aircraft vessel, could not be picked up on radar, make no sound for human ear detection, and exactly what kind of energy could it possibly be powered by???? Please be specific.

2007-10-30 23:38:28 · 8 answers · asked by AK/BRAT 2

but i read in the papers that a scientist proved him to be wrong what did he say.please explain in simple language.

2007-10-30 22:24:27 · 14 answers · asked by Anonymous

Standard solar cells only use the red spectum of light to convert light to energy. Is it possible to change other wave lengths to red by the use of lenses?

2007-10-30 21:28:43 · 3 answers · asked by bookheflin 1

2007-10-30 20:29:40 · 3 answers · asked by guy17 2

2007-10-30 20:04:05 · 8 answers · asked by Anonymous

A massless spring of spring constant k is mounted on a turntable of rotation inertia I.the turntable is on a frictionless vertical acle,though initially it is not rotating.the spring is compressed a distance dx from its equilibrium,with a mass m placed against it.when the spring si released,the mass leaves the spring moving at right angles to a line through the center of the turntable,at a distance b from the denter,and slides without friction across the table and off find expression for a)the linear speed of the mass and b) the rotational speed of turntable?

2007-10-30 19:43:29 · 1 answers · asked by john m 1

To make an electric magnet I have a wire a battery and a piece of iron - the only problem is the piece of iron has a small hole right through the middle of it and im wondering if it will still become magnetic?

2007-10-30 19:25:24 · 2 answers · asked by George W 1

50kg person initially at rest slips off ledge 5.0m above ground person falls to ground and stops by sinking .10m in mud hole. determine average force of mud in stopping the person.

2007-10-30 18:09:05 · 2 answers · asked by Anonymous

How do we tap into them and how many are there? How can I learn about them?

2007-10-30 17:48:16 · 4 answers · asked by tunafish 2

I am making a toothpick bridge. The final mass of the bridge must not exceed 40 grams and it has to be at least be 30 cm long. There are 28 grams in one ounce. The mass can be less. It has to hold at least 1 kilogram (2.2 pounds) and extra credit will be given for more kilograms held which I definitely want.

What kind of bridge would be the best for holding the weight? How should I design it and go about it? What kind of glue should I use?

Thank You.

2007-10-30 17:37:16 · 3 answers · asked by nirmal 1

If the standard deviation is 0.45 and the average is 8.79, it can be written as:

8.79 +/- .45 or as 8.79 +/- 8.79%.

Under what conditions would the percentage notation be more useful in respect to experiments?

2007-10-30 17:23:17 · 1 answers · asked by labelapark 6

question: a 2.1 x 10^3 kg car starts from rest at the top of a driveway that is sloped at an angle of 20.0 degrees with the horizontal. an average friction force of 4.0 x 10^3 N implodes the car's motion so that the car's speed at the bottom of the driveway is 3.8 m/s. What is the length of the driveway?

(question involves work-kinetic thm)

answer: 5.1m

how do you get this answer?

2007-10-30 17:22:09 · 1 answers · asked by Asiana 1

During a serve, a tennis racket of mass 1.1 kg is given an angular acceleration of 160 rad/sec2. At the top of the serve, the racket has an angular speed of 14 rad/sec.

If the distance between the top of the racket and the shoulder is 1.4 m, what is the total acceleration of the top of the racket?

2007-10-30 16:29:45 · 1 answers · asked by Anonymous

Catching a wave, a 64 kg surfer starts with a speed of 1.3 m/s, drops through a height of 1.75 m, and ends with a speed of 8.2 m/s. How much nonconservative work was done on the surfer?

2007-10-30 16:09:24 · 1 answers · asked by =P 6

while you are driving along at 50 km/hr your attention wanders for 1/2 sec, how far do you travel "blind" in that half second?

2007-10-30 16:02:04 · 5 answers · asked by hepaintsmeeblue 1