Physics - April 2007

No homework. Thank you.

2007-04-30 23:01:08 · 3 answers · asked by Dovey 7

hmmmmmmm
Will I look stupid by asking somebody to SIMPLIFY Maxwell's equations to me?
either step by step but very gently , or
refer me to a website that can do so.
I need to know about these equations for my study & I do not have a very solid background in Math.
Every resonse is grealy appreciated.
Thank you

2007-04-30 22:42:34 · 5 answers · asked by drinda_house 3

Firstly, the iron in our blood is not a metal, Am I right?

2007-04-30 22:32:44 · 6 answers · asked by bavwill 3

2007-04-30 22:31:03 · 4 answers · asked by Anonymous

2007-04-30 22:21:20 · 4 answers · asked by Anonymous

2007-04-30 22:10:41 · 4 answers · asked by Teddy Boo 1

2007-04-30 21:32:20 · 3 answers · asked by Jazmina 1

2007-04-30 20:12:29 · 1 answers · asked by Anonymous

singularities are a breakdown of a mathematical model, usually. Then why is their the Big Bang Theory, which also predicts a singularity?

2007-04-30 20:06:09 · 6 answers · asked by Anonymous

Quadriceps
Biceps
Masseter

Show your assumptions and calculations
(What kind of equations & formula's are used to solve this)

2007-04-30 19:20:36 · 1 answers · asked by kissdeesky88 1

Estimate the axial compression force necessary to fracture your femur based on the ultimate properties given above.

(I just need to know how do I go about estimating them both. ie. equations, formulas etc.)

2007-04-30 19:18:32 · 2 answers · asked by kissdeesky88 1

Light of wavelength 633 nm is incident on a narrow slit. The angle between the first diffraction minimum on one side of the central maximum and the first minimum on the other side is 1.20 degrees. What is the width of the slit?

2007-04-30 19:05:53 · 1 answers · asked by Anonymous

A stockroom worker pushes a box with mass 11.0 kg on a horizontal surface with a constant speed of 3.60 m/s. The coefficient of kinetic friction between the box and the surface is 0.240

What horizontal force must be applied by the worker to maintain the motion? (i already calculated this answer to be 25.9N)

If the force calculated in part (A) is removed, how far does the box slide before coming to rest?

2007-04-30 18:51:48 · 1 answers · asked by Anonymous

In class today, my professor mentioned that people still don't know why gravity exists. It seems to me that gravity is just the result of large scale electromagnetic forces. It can't just be a coincidence that the equation for the force gravity and for the force of electric charges are the same, can it? what do you guys think?

2007-04-30 18:50:33 · 6 answers · asked by rdigrdig 2

1. They are composed of different types of iron
2. The same reason that makes planes fly in the sky
3. Iron ships have large air pockets inside them, making them less dense than water and thus able to float

2007-04-30 18:27:11 · 11 answers · asked by papaya 1

Explain how Quantum Mechanics differs from Classical Mechanics. How does this difference apply in the photoelectric effect?

2007-04-30 18:15:05 · 1 answers · asked by ZG786 1

1. Radioactivity, activity, decay constant,and half-life.
2. The applied voltage and wavelength.
3. Work function and stopping porential
4. Maximum energy and work function.
5. Current and voltage produce (in a form of graph).
6. Wave length and energy levels.

2007-04-30 18:05:42 · 1 answers · asked by ayim85 1

The fear of getting on a giant ball of fuel ready to explode at any moment while your guts race to your feet....or....the same experience on earth.

2007-04-30 17:58:17 · 2 answers · asked by Anonymous

2007-04-30 17:49:19 · 4 answers · asked by Anonymous

so he asked me to look it up on here since i'm the only one who offered to. can anyone help me out please??

Neopia is a strange little planet. Its gravitational acceleration at its surface is exactly 10.0 metres per second per second, and its diameter is exactly 2100 kilometres.

Also, a completely unrelated fact, aliens are able to consume about 0.4 kg of pretty much anything they want to eat, every minute, nonstop.

Assuming that the density of the planet is uniform, and that orbiting bodies don't significantly affect the planet's gravity, how many years will it take one million aliens to consume one cubic kilometre of Neovia? Please round up to the nearest year.

2007-04-30 17:35:46 · 4 answers · asked by morgan g 1

unification of fundamental forces

2007-04-30 17:28:43 · 4 answers · asked by Anonymous

1) Consider a sample of freshly cut wood that has been reduced to pure carbon. What is the activity per gram resulting from the decay of 14C (halflife of 5730 y) in this material? [Hints: since the wood is freshly cut, the ratio of 14C to 12C is that of air; find the activity of a one gram sample.]

2) The presence of a neutrino among the decay products of a particle
a) tells us nothing about the force responsible
b) none of these
c) suggests that the strong force was at work
d) suggests that the electromagnetic force was at work
e) tells us that the weak force was at work

I have no clue about the first one (was sick and didnt go to class) but I think the second one is C.

2007-04-30 17:28:29 · 1 answers · asked by Jake D 2

unification of fundamental forces

2007-04-30 17:23:04 · 5 answers · asked by Anonymous

Ive been reading that the size and density of something determines how much gravity it will have, but how does it make gravity in the first place?

2007-04-30 17:22:23 · 8 answers · asked by Anonymous

2007-04-30 17:22:21 · 4 answers · asked by Anonymous

I need help pleaseeeeee?
hey everyone i need help last question

8) Christine hangs a 3.0 m length of steel wire from the
ceiling and attaches a mass of 2.0 kg to the end of this
wire. She observes that the mass extends the length of
the wire by 3.6 mm. If the diameter of the wire is
0.32 mm, calculate:
a) the strain of the wire

b) the stress on the wire

c) a value of Young’s modulus for the steel.

2007-04-30 17:17:56 · 1 answers · asked by Anonymous

I'm having a difficult time grasping the concept of string theory but find it quite interesting. I've heard that under this theory parallel universes may exist.

Please explain to me in very simple terms *how* string theory could account for parallel universes.

I've been wrestling with the idea of not just past lives and deja vu but that there appear to be overlapping elements. Like everyone supposedly has a look-alike somewhere in the world. That sort of thing. If any of this makes sense and you understand particles and molecules and physics, help! Thanks.

2007-04-30 17:17:33 · 2 answers · asked by Anonymous

I want to know that why stress is usually plotted on Y-axis and strain on X-axis. In actual we draw the curve between taking load on Y-axis and extension on X-axis. if we see carefully then we will find that extension is produced after the load has been applied to a material. so that means load is independent varaible and extension is dependent variable. AS indenpendent variable is always taken on X-axis and the dependent variable is taken on Y-axis then it means stress should be plotted on X-axis and strain on Y-axis but in actual it is reversed. Why ????

2007-04-30 17:14:49 · 1 answers · asked by balwinder k 1

8 Christine hangs a 3.0 m length of steel wire from the
ceiling and attaches a mass of 2.0 kg to the end of this
wire. She observes that the mass extends the length of
the wire by 3.6 mm. If the diameter of the wire is
0.32 mm, calculate:
a the strain of the wire
b the stress on the wire
c a value of Young’s modulus for the steel.

2007-04-30 17:13:14 · 1 answers · asked by Anonymous

Theoretical question.Matter has to be in motion to exist? Lets say the big bang stopped? And the galaxies stop? Then trully the evidence in the universe is not what,why,or how but when.The frequency of nothing?

2007-04-30 17:10:04 · 1 answers · asked by Yukon Cornelius 2