Physics - December 2006

2006-12-11 05:33:41 · 4 answers · asked by Anonymous

2006-12-11 05:23:57 · 8 answers · asked by Generator gator 3

An enemy ship is on the east side of a mountain island. The enemy ship has maneuvered to within 2 500 m of the 1 800-m-high mountain peak and only can shoot projectiles with an inital speed of 250 m/s. If the western shoreline is horizontally 300 m from the peak, what are the distances from the bombardment of the enemy ship?

2006-12-11 05:23:03 · 1 answers · asked by R C 2

2006-12-11 05:22:44 · 9 answers · asked by Rajab R 1

I know that all matter is broken down as MOLECULES; ATOMS; ELECTRONS, PROTONS & NEUTRONS; QUARKS & LEPTONS...but what is the most fundamental particle of a baseball? Is it the same for any object with mass?

2006-12-11 05:21:10 · 2 answers · asked by Prince Auggie 2

2006-12-11 05:06:53 · 5 answers · asked by JetAlone 2

A single bead can slide with negligible friction on a wire that is bent into a circular loop of radius 15.0 cm. The circle is always in a vertical plane and rotates steadily about is vertical diameter with (a) a period of 0.450 s. The position of the bead is described by the angle theta that the radial line, from the center of the loop to the bead, makes with the vertical. At what angle up from the bottom of the circle can the bead stary motionless relative to the turning circle? (b) Repeat the problem if the period of the circle's rotation is 0.850 s.

2006-12-11 05:06:00 · 1 answers · asked by R C 2

internal energy of the system?

2006-12-11 05:05:13 · 1 answers · asked by Anonymous

2006-12-11 05:02:59 · 4 answers · asked by imRockinTheStage 2

2006-12-11 04:54:26 · 4 answers · asked by Anonymous

A grating has exactly 7000 lines uniformly spaced over 2.54 cm and is illuminated by light from a mercury vapor discharge lamp. What is the expected angle for the third-order maximum of the green line ( = 546 nm)?

2006-12-11 04:50:10 · 1 answers · asked by Anonymous

2006-12-11 04:49:59 · 2 answers · asked by Anonymous

problems with the special theory of relativity

2006-12-11 04:43:03 · 6 answers · asked by NoClue W 1

can some one plz tell me how to easily find the centre of gravity of any object??????? ANY PHYSICS EXPERTS OUT THERE!!!!!!!

2006-12-11 04:26:34 · 3 answers · asked by fm 1

2006-12-11 04:19:39 · 9 answers · asked by Anonymous

For the theory part of my lab, we are to find the theoretical slope of the height at which a Hotwheels car rolls down a ramp versus the distance the car travels horizontally after it reaches the bottom. I have the actual slope from a graph I constructed, but I don't know how to find it theoretically. Someone told me it was height = the coefficient of friction times distance, but I don't know if it is right. If someone could just help me find an equation, that's all I need. Thanks in advance.

2006-12-11 03:42:22 · 4 answers · asked by abc123 1

I know that the individual molecules just bob up and down. What makes the wave as a whole move outward, and not say inward?

I mean, since the edge of a wave is a wavefront, what is preferred about the outward direction, for the wave to propagate. How does a water molecule bobbing 10 feet away from the stone know from which direction it got the energy to bob up and down?

Since all the water particles are moving perpendicularly to the surface, the force it would exert in the outward direction would be 0 (Cos 90 = 0).

So how can the bobbing particles 'push' other particles outward?

2006-12-11 03:29:59 · 5 answers · asked by Bhagwad 3

And how important is the "phase difference" when you "add" 2 oscillations with the same direction and period ?

2006-12-11 03:12:33 · 5 answers · asked by Lulu 1

I've read that a spinning ball, when it picks up velocity in air, encounters a free stream flow of air which acts in one direction, say left to right. Can someone explain from here how a ball, spinning in clockwise direction, causes a force to be constituted? I just want a clearer picture of this. I don't understand the explanation about the change in velocity, and then pressure, and then a net force up.

Since the ball spins clockwise, so the free stream flow over the top of the ball is assisted by the circular flow; the free stream flow below the ball is opposed by the circular flow.
The above is extracted from a source. So, i was thinking, since the velocity of air is lower below the ball and higher above the ball, (assuming its spinning in clockwise direction like how ur finger does when pointing to the screen) can i apply Bernoulli's Principle here? Where lower velocity means higher pressure and higher velocity means lower pressure, and so constitutes an upward force as well.

2006-12-11 03:11:48 · 1 answers · asked by luv_phy 3

If you were to put a powerful nuclear weapon down a coal mine, seal it off with thousands of tons of earth and concrete, then explode the weapon. When you reopened the mine would it be full of diamonds?

2006-12-11 03:05:29 · 4 answers · asked by David H 6

2006-12-11 02:52:51 · 10 answers · asked by sammnpm 1

2006-12-11 02:51:14 · 11 answers · asked by sammnpm 1

2006-12-11 02:49:04 · 7 answers · asked by sammnpm 1

What I mean is, does light simply travel at the fastest possible speed possible so therefore we know it as "the speed of light". Or is it the fact that it is light itself that is travelling at that speed that means nothing can go faster.

For example, if light travelled a few seconds slower than it does, would that then be the fastest possible velocity.

I probably haven't explained that very well. Does anyone know what I'm on about?

(PS: I'm already aware of E=MC 2 etc)

2006-12-11 02:19:58 · 11 answers · asked by Hello Dave 6

2006-12-11 02:16:25 · 3 answers · asked by bobkilom 1

2006-12-11 02:11:35 · 3 answers · asked by bobkilom 1

2006-12-11 02:02:27 · 17 answers · asked by Anonymous

assume that:
on 1st january 1996, at 00:00:00 am, a ray of light was fired into space. with detectors, the distance travelled by it was measured.
assuming that the obstruction in the path of light is negligible, find the distance (in meters) that the light would have travelled from the point of firing on 31st december 1996at 11:59:59 pm.

im doing a quiz..and im stuck on this one..its sort of intelligenct test...but still if anyone can come up with a solution.

2006-12-11 01:43:50 · 2 answers · asked by at 2

where C is the boundary of the region R defined by y^2=8x and x=2. Have an exam tomorrow and its all similar questions!

2006-12-11 01:41:56 · 1 answers · asked by Anonymous

2006-12-11 01:39:56 · 11 answers · asked by sammnpm 1