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Physics - October 2006

[Selected]: All categories Science & Mathematics Physics

K=1/2 M V ^2, are the units of M in grams or kg? and is V m/sec, cm/sec or k/hour?? The question is Kinetic energy of a baseball where mass is 5.25 ozs and V 100miles/hour. I dont know what to convert too,

2006-10-31 15:23:03 · 2 answers · asked by lewisepalmer 2

The X-rays are very harmful to our physical health.

2006-10-31 15:12:12 · 2 answers · asked by JAMES 4

1

given a head wind of 15mph,what percentage of loss would I have from 2mph wind if I throw by neighbors cat at a velocity of 35mph(i spin cats over my head like no one else can)

2006-10-31 15:06:51 · 1 answers · asked by steve b 5

As I was reading special theory of relativity and general theory of relativity, I found out something very interesting which said that at the beginning of our universe, the universe was concentrated in a point called singularity where the laws of physics do not apply...
Now it has been proven that the universe is expanding... therefore giving support to the big bang theory...

Well in that point of space and time called singularity the laws of physics do not apply.. Then what made it burst into the huge big bang if there was nothing outside and in the inside the laws were not comprehensible then what made it burst into a huge explosion?... scientist say that only a supernatural power could have been the reason for such expansion... God? Think about it....

Sometimes science makes me reflex about my beliefs (religion) positively or negatively but this time is positively.

2006-10-31 14:05:31 · 15 answers · asked by Anonymous

when watching ghost hunters and so on, they're always holding this little pda like machine in their hands and whenever the machine shows alot of electro magnetic field around, they say its a ghost... someone explain to me how this works?
I also have no idea what catagory this should be in

2006-10-31 14:02:58 · 11 answers · asked by Anonymous

2006-10-31 13:52:32 · 7 answers · asked by Anonymous

A 70kg box is pulled by a 400N force at an angle of 30 degrees to the horizontal. The force of kinetic friction is 75 N.

What is the acceleration of the box?

2006-10-31 13:37:56 · 1 answers · asked by cubscaps33 5

Water from a garden hose that is pointed 29° above the horizontal lands directly on a sunbather lying on the ground 4.1 m away in the horizontal direction. If the hose is held 1.4 m above the ground, at what speed does the water leave the nozzle?

2006-10-31 13:09:47 · 3 answers · asked by Anonymous

During a head-on collision, a passenger in the front seat of a car accelerates from 13.3m/s to rest in .1 second. A 25kg child is thrown through the car. What is the weight of the child?

2006-10-31 13:07:29 · 4 answers · asked by cubscaps33 5

Suppose that a 1000 kg car is traveling at 25 m/s. Its brakes can apply a force of 5000N. What is the minimum distance required for the car to stop?

2006-10-31 13:05:09 · 5 answers · asked by cubscaps33 5

0

A person lifts a 4.9 kg cement block a vertical distance of 1.50 m and then carries the block horizontally a distance of 12.40 m.

How much work is done by the person in the process?
___J
How much work is done by gravity in the process?
___J

how do you do it?

2006-10-31 13:01:40 · 4 answers · asked by tingerpoo 2

2006-10-31 12:52:46 · 6 answers · asked by karelia 1

2006-10-31 12:41:46 · 6 answers · asked by Anonymous

I heard that the universe is constantly expanding, well if the universe is constantly expanding then matter and energy must be expanding with it, so if a person was able to travel back say 5000 years in the the past would his atomic mass be altered do to the fact that the universe of 5000 years ago would be more dence than it is today, if it was altered what would the results be?

2006-10-31 12:26:09 · 10 answers · asked by Anonymous

Joe wishes to hang a sign weighing 750 N so that cable A, attached to the store, makes a 30 degree angle. Cable B is horizontal and attached to an adjoining building. What is the tension in cable B, work please.

2006-10-31 12:07:56 · 2 answers · asked by Anonymous

A street lamp weighs 150 N. It is supported by two wires that form an angle of 120.0 degrees with each other. The tensions in the wires are equal.

a. What is the tension in each wire supporting the street lamp.
b. If the angle between the wires supporting the street lamp is reduced to 90 degrees, what is the tension in each wire.

Please help me show all the work involved in the steps.
I need help understanding it.

2006-10-31 11:38:49 · 2 answers · asked by swimmertommy 1

2006-10-31 11:27:33 · 3 answers · asked by izad a 1

One of my relative's has one on the heart. What exactly does an Anurism do?

2006-10-31 10:04:19 · 5 answers · asked by thelawnlord 1

I got this question from my Math-teacher, but he also told me that this problem was still way outta my league( I'm 15).

2006-10-31 09:53:10 · 10 answers · asked by ArktiK 1

why does jacobs ladder arc and a high voltage arc appear to look different?

2006-10-31 09:46:09 · 5 answers · asked by csnape2003 3

I'm a physics student in VA, what's the best way to go about getting a physics paper publisehd in major journals..if it is indeed ground breaking?

2006-10-31 09:43:22 · 3 answers · asked by Jae G 2

flies level to the ground at an altitude of 12 km with a constant speed of 186 m/s relative to the Earth.

What is the magnitude of the plane's angular momentum relative to a ground observer directly below the plane in kg . m^2/s?

Does this value change as the plane continues in motion along a straight line (increase, change in random pattern, decrease, remain constant)?

2006-10-31 09:04:25 · 2 answers · asked by Anonymous

2006-10-31 08:49:54 · 13 answers · asked by rafael 1

To put it more clearly here are the conditions and a restated question:

- there are 2 electrons and 1 proton.
- the proton is in between the electrons
- the electrons are equal distance to the proton
- the electron-electron repulsion doesn't matter to me

Diagram:
e- p+ e-

Question: Does the +1 charge of the proton "divide" equally and each electron gets half the force, or does each electron "feel" the entire +1 charge of the proton?

2006-10-31 08:44:09 · 5 answers · asked by Chris G 2

A flight attendant pulls her 75.0 N flight bag a distance of 241.0 m along a level airport floor at constant speed. The force she exerts is 438 N at an angle of 66.0° above the horizontal. Find:

The work she does on the flight bag.

The work done by the force of friction on the flight bag.

The coefficient of kinetic friction between the flight bag and the floor.

How would you solve this problem? With what formulas?

2006-10-31 08:15:58 · 4 answers · asked by gunder53534 2

I know someone has thought of this already but is there any evidence or research on this?

2006-10-31 08:04:38 · 10 answers · asked by logisticswizard 1

or is GOD english speaking?
English is the universal language not by accident, but by design.

"GOD does not play dice with men" -- Albert Einstein

What do you think about this amusing conjecture?
- Please do not give any kind of references.
- You could surmise with your own quote. (Not Borrowed)

2006-10-31 07:53:52 · 15 answers · asked by Anonymous

2006-10-31 07:42:53 · 2 answers · asked by Anonymous

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