Physics - March 2007

A critical role meaning objects can occupy the same space.

2007-03-03 13:56:43 · 7 answers · asked by alone 2

LPG in Units are stored in sphere or sometimes cylindrical bullets. What are the causes behind that?

2007-03-03 13:52:59 · 6 answers · asked by BHABENDRA KUMAR D 2

I know that Doppler effect occurs in sound because 1. sound is mechanical and requires a medium to propagate and 2. velocity of light is the same in all “inertial frames” where as sound is not but why is diffraction not as common in light as opposed to sound

2007-03-03 13:40:31 · 5 answers · asked by Anonymous

Tell me anyting (about quantum physics anyway) cuz it will be more than i know now

thanks =)

2007-03-03 13:36:29 · 9 answers · asked by Anonymous

A 1100 kg car traveling at a speed of 39.0 m/s skids to a halt on wet concrete where mu_k = 0.680 .How long are the skid marks?

2007-03-03 13:22:07 · 5 answers · asked by RelientKayers 4

a 7.00 kg bowling ball falls froma 2.00 m shelf. Just before hitting the floor, what will be its kinetic energy? (g=9.80 m/s^2)

I know KE= (1/2)mv^2, obviously m=7.00 kg, but what do you do with the 2 m and gravity.

2007-03-03 13:07:46 · 9 answers · asked by Anonymous

ok here is my question....

a stroboscope is a light that flashes on and off at constant rate. it can be used to illuminate rotating object. if the flashing rate is adjusted right the object ccan appear stationary.

1. waht is shortest time between flashes of light that will makes a 3 bladed propeller appear stationary when it is rotating with angular speed. of 13.8 rev/ s

2. what is next shortest time....?

please explain i read the chapter over and over and over again and i cant find anything to relate tot his problem... maybe im completely missing something but i am extremely lost. please explain in detail as i am desperate to grasp physics...(it is so hard to me) please helpme and explain i really need to understand where answers come from and how to set up problems thank you

2007-03-03 12:40:36 · 3 answers · asked by Anonymous

Discussion question: Where, exactly, does the energy stored in oil come from? How can we get "work" from oil? In your discussion, try to use the words work, energy, heat, power, and conservation in their correct physical sense.

2007-03-03 12:33:24 · 3 answers · asked by angelgirl 2

References: Nunitak's Weather Blog (questioner, electrostatic tornado theory)
Tornado Electrodynamics
http://www.tmgnow.com/repository/planetary/tornado.html
http://www.bibliotecapleyades.net/ciencia/planetophysical/planetophysical_vacuumdomain.htm
http://www.tmgnow.com/repository/planetary/pfvd.html
http://www.madscitech.org/scg/scg.htm
http://search.yahoo.com/search?ei=utf-8&fr=slv8-ccle&p=tornado%2belectrodynamics

My considered theory is that tornadoes are primarily an electrodynamic phenomenon resulting from localized electrostatic imbalances. I have only just started investigating this, but I am very weak on advanced physical science math and concepts.

I do know some electronics and electricity but never went through college.

The first cited paper from Russians is QUITE INTERESTING, please read at least this one fully!!! Notice the peripheral tornadic phenomenoa involving people, materials, electrical and luminescent manifestations.

2007-03-03 12:26:45 · 3 answers · asked by Ursus Particularies 7

Can something have energy without having momentum? Why or why not?

2007-03-03 12:26:40 · 7 answers · asked by angelgirl 2

2007-03-03 12:19:31 · 3 answers · asked by anna_alcantara07 1

2007-03-03 12:16:26 · 2 answers · asked by anna_alcantara07 1

2007-03-03 12:14:33 · 2 answers · asked by anna_alcantara07 1

To fly due north the pilot should aim the plane in the direction

2007-03-03 12:14:04 · 4 answers · asked by sakinah_123 1

the name?

2007-03-03 12:11:50 · 3 answers · asked by Ruth Less RN 5

Arlene is to walk across a high wire strung horizontally between two buildings 11.0 m apart. The sag in the rope when she is at the midpoint is 10.0°, as shown in Figure 4-42. If her mass is 58.0 kg, what is the tension in the rope at this point?
N

2007-03-03 11:37:42 · 1 answers · asked by nafiseh g 1

2007-03-03 11:33:13 · 5 answers · asked by dagoono2006 1

A stationary object receives a direct hit by another object moving toward it. Is it possible for both objects to be at rest after the collision? Explain.

2007-03-03 11:13:33 · 2 answers · asked by Anonymous

2007-03-03 11:07:32 · 11 answers · asked by Anonymous

When a rubber ball is dropped from a height of 2.5m onto a hard surface, it loses 25% of its mechanical energy on each bounce. With what speed would the ball have to be thrown downward to make it reach its original height after the first bounce?

2007-03-03 11:04:07 · 2 answers · asked by Anonymous

Consider a conical pendulum with an 79.0 kg bob on a 10.0 m wire making an angle of (theta) = 3.00° with the vertical (Fig. P6.9).


Figure P6.9
- http://www.webassign.net/pse/p6-13.gif


(a) Determine the horizontal and vertical components of the force exerted by the wire on the pendulum.
in the notation N i + N j
(b) What is the radial acceleration of the bob?
in m/s2 (toward the center of the path)

2007-03-03 11:01:25 · 2 answers · asked by bonkti 3

A wad of gum is shot at a block of wood. In which case does the gum exert the larger impulse on the block, when it sticks or when it rebounds?

2007-03-03 10:59:52 · 3 answers · asked by Anonymous

A block of mass 8.00 kg is pushed up against a wall by a force P that makes a 50.0° angle with the horizontal as shown in Figure
P5.46. The coefficient of static friction between the block and the wall is 0.288. Determine the possible values for the magnitude of P that allow the block to remain stationary.
please find N (maximum)
and N (minimum)

http://www.webassign.net/pse/p5-53.gif

2007-03-03 10:58:32 · 1 answers · asked by bonkti 3

In relativity, as speeds increase for something time slows down for that something to an outside viewer. Something needs energy to accelerate to any speed. Is there an equation showing the relationship between energy, and the amount time changed to the outside viewer, in this instance of relativity?

2007-03-03 09:53:36 · 2 answers · asked by psilocyphener 3

I was bowling last night, and I saw this girl who had a sweater on that looked clean under normal light, but once we started bowling under the "black" or uv lights, the back of her sweater lit up like a CSI crime scene. I know the four bodily fluids that can show up under a black light, but are there other things that show up as well?

2007-03-03 09:36:24 · 5 answers · asked by Ryan O 2

If earth rotation be able more fast...the gravity will be minor?And vice versa?

2007-03-03 09:24:14 · 6 answers · asked by drfravio 2

2007-03-03 09:19:47 · 11 answers · asked by Anonymous

If my initial wavefunction is given by
psi={Ax(a-x), 0 0, elsewhere

and A=SQRT(30/a)

How would I find what probability of the particle described by this wavefunction will be found in the region -0.5a
I know the probability between -0.5

2007-03-03 09:12:41 · 1 answers · asked by chica1012 2

and dug all the way to the bottom, then went to the top and jumped into the hole......

would you fall into the sky (before gravity sets in and you plummet back down to earth!!)

2007-03-03 09:04:43 · 10 answers · asked by dodge 1

Hey guys... i'm having trouble with two questions...can anyone help? Thanks in advance!

1. In the Bohr theory of the hydrogen atom, an electron moves in a circular orbit about a proton. The radius of the orbit is 0.53x10^-10m. If this force causes the centripetal acceleration of the electron, what is the speed of the electron?

2. A positively charged beat having a mass of 1.00g falls from rest in a vacuum from a heigh of 5.00m in a uniform vertical electric field with a magnitude of 1.00x10^4 N/C. The bead hits the ground at a speed of 21.0 m/s. Determine the charge of the bead.

2007-03-03 08:33:53 · 1 answers · asked by Anonymous