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Physics - January 2007

[Selected]: All categories Science & Mathematics Physics

2007-01-28 05:01:34 · 1 answers · asked by xyz123 1

2007-01-28 04:52:04 · 9 answers · asked by thirteen 1

Anyone who saw this movie can think of magic being a real amazing thing. All congrats to Edison, and specially Tesla for their contribution in the creation for Energy, Power, and even magic?
My question to this, from one scene in the movie "The Prestige", Tesla, put one hand on the magicians arms, and gave a him a light bulb to hold in the other hand.. weird enough, the light turned on, and Tesla stated, " That the body can give enough energy to turn on the lamp" Is this true? If many people hold up one another, can there be enough Current to make a lamp turn on?>

2007-01-28 04:46:43 · 2 answers · asked by Shawn Miller 1

A 4-kg block sits on top of a shelf. Connected by a light and frictionless string to the 4-kg block, a 2-kg block is suspended over a pulley on the edge of the shelf. The coefficient of kinetic friction between the 4-kg block and the shelf is 0.35.
a)Find the energy dissipated by friction when the 2-kg block falls a distance y
b)Find the total mechanical energy E of the two-block system after the 2-kg block falls a distance y
c)Use your result for (b) to find the speed of either block after the 2-kg block falls 2 m

This is in relation to Kinetic and Potential Energy. I've racked up my brain all night to solve this...Help!

2007-01-28 04:43:09 · 1 answers · asked by bl00ish 2

I am only given 10 Ohm resistors, and i need to connect them to produce a network of resistors with 2 Ohms, and then 10Phms using more than one resistor.

2007-01-28 04:42:52 · 3 answers · asked by Fred 1

tornadoes can develope in only an hour and they can cause much demages in only a fewminutes describe how the doppler effect could be used to warn aginst an oncoming tornado

2007-01-28 04:40:49 · 2 answers · asked by pen_pencile 1

thank you for your time

2007-01-28 04:27:39 · 2 answers · asked by death angel 1

I have to do an oral presentation about Einstein. I completely understand the Theory of Relativity but I am not sure how I can present it. I will have access to a chalkboard so I can write things and draw things. I want to include E=mc^2, Special Relativity, and General Relativity.

2007-01-28 04:13:21 · 4 answers · asked by Anonymous

2007-01-28 04:12:55 · 6 answers · asked by Anonymous

During nuclei fission, large nuclei with high masses are split into two nuclei with smaller masses. During nuclear fission, two nuclei with low masses are combined to form one nucleus of larger mass. How are the two processes similar? ( i hate "think critically" questions)

2007-01-28 04:08:17 · 3 answers · asked by YYYpunk 3

2007-01-28 03:59:19 · 15 answers · asked by Anonymous

arrow, starting from rest, leaves the bow with a speed of 28.5 m/s. If average force on the arrow by the bow were doubled, all else remaining the same, what speed would the arrow leave the bow?


i'm completely lost by this problem........

2007-01-28 03:41:10 · 6 answers · asked by imjustmewhatelseshouldibe 1

Here's the question: A brass cylinder has a height of 3.54 cm and a diameter of 13 mm. What is its volume? What is its mass?

I have already found the volume (4.7cm^3) and it says I will need to use an experimental quantity to figure the mass. I'm not quite sure what that means...

2007-01-28 03:25:00 · 3 answers · asked by Anonymous

2007-01-28 03:01:49 · 8 answers · asked by Anonymous

A 1.20 kg toaster is not plugged in. The coefficient of static friction between the toaster and a horizontal countertop is 0.370. To make the toaster start moving, you carelessly pull on its electric cord. For the cord tension to be as small as possible, you should pull at what angle above the horizontal?

Does anyone know how to solve this question?

2007-01-28 02:53:10 · 3 answers · asked by jkl 1

i have a homework problem i have been workin on for hours now and i cant understnad it .....
A ducks mass = 2.9 kg. As the duck paddles, a force of 0.08 N acts on it in a direction due east. the current of the water exerts a force of 0.27 N in a direction of 41° south of east. When these forces begin to act, the velocity of the duck is 0.12 m/s due east. what is magnitude and the direction (relative to due east) of the displacement ofthe duck after 3.4 s while the forces are acting.

that is my homework problem i would like someone not to do it for me but maybe talk me through how to set up a problem like this so i can learn it myself...

2007-01-28 02:08:50 · 3 answers · asked by imjustmewhatelseshouldibe 1

Heres two other questions i got wrong on my test, you guys really helped w/ my last one thanks!

1. A metal container filled with gas Z is placed in ice. What will happen to the pressure of the gas? what will happen to the volume? Why?

2. An infected tooth forms an abscess that fills with gas. The abscess puts pressure on the nerve of the tooth causing a tooth ache. While waiting to see a dentist, the person with a toothache tries to releive pain by treating the infected area with a moist, hot, towel. Will this treatment help? Why, or Why not?

2007-01-28 01:27:46 · 6 answers · asked by Xbox361 1

why is the sky blue ?cause i got to find this girl named mandie.

2007-01-28 01:18:52 · 10 answers · asked by Markus B 1

But I participate for the intention biggest, that is well-being of the society, and never for the fear or egoism, that paralyze or in them they take the distortions in our proper way to be. Differently I finished indirectly rationalizing to all those that search new knowledge, and that if it transforms into action without gaps for optimum of that we are part of this Our alternating History of Daily pay-History. Any physical theory is provisory, in the direction of being only one hypothesis. It does not matter where the theory of the gravity of Newton if based, in which the bodies if attract reciprocamente with an inversely proportional force that was called mass of each one and to the square of in the distance between them. I ask! This same gravity in the Land exists for the Sun, that says the nuclear physicists, astrophysical astronomers and: The Sun, only loses energies, but it does not lose its gravitational forces of attraction for the planets that had always kept its distancias?

2007-01-28 00:58:20 · 1 answers · asked by britotarcisio 6

Please can you explain this in a simple way because the other questions like this are too confusing for my ickle brain xDD

2007-01-28 00:41:28 · 4 answers · asked by Anonymous

2007-01-28 00:23:01 · 5 answers · asked by John L 1

We are currently having a debate and though this may sound rather trivial, but at what time does the day become night and vica versa and why it is such a time. Some say between 6 & 7 but why is this? or does night time start at 12 midday and end at midnight?

2007-01-28 00:22:01 · 7 answers · asked by barry 1

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a stone thrown upwards returns to its point of projection after 5 sec .find the velocity of projection

2007-01-28 00:17:52 · 3 answers · asked by byebyebaby2001 1

a sphere of radius 1.4 m weighs 500kg.calculate the density of material of sphere

2007-01-28 00:17:26 · 4 answers · asked by byebyebaby2001 1

A scale is divided into 0.5mm divisions .if 20 divisions of this scale are divided into 25 equal parts if a vernier callipher calculate the least count

2007-01-28 00:15:24 · 4 answers · asked by byebyebaby2001 1

i need this for our physics subject.. I geuss that cellphones would be an interesting topic... so, is it a WAVE gadget or an ELECTRIC gadget? thanks!

2007-01-28 00:04:08 · 1 answers · asked by Anonymous

it is about a science question

2007-01-27 23:46:19 · 16 answers · asked by Anonymous

It is related to Atomic physics?

2007-01-27 23:34:09 · 3 answers · asked by Anonymous

2007-01-27 22:30:11 · 10 answers · asked by Shubham Agarwal 1

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