Physics - October 2006

hi .... i'm hoping someone can help me with a problem from my high school physics book ..... i've worked on this problem for about 1 hour and can't seem to get the answer ...... my teach didn't ask us to do this one as homework but i'm trying it any way .....i'm stuck ....... i hope someone can help..... thanks.....

Three coplanar forces act on a 75000.0 kg object in outer space, where there is no gravity: 14.2 kN directed at 357°, 25.6 kN at 138°, and 16.4 kN at 255°. All directions are with respect to the x direction.

What is the magnitude and direction of the acceleration?

If the object has an initial velocity of 17.5 miles/h directed at 58.6° in the same plane as all three forces, what will its velocity and position be after the force has been applied for 65.5 s?

What will the objects direction from the origin be and in what direction will it be moving assuming the force was applied at the origin of coordinates?

2006-10-21 09:30:13 · 4 answers · asked by Bill W 1

classical mechanics

2006-10-21 09:17:16 · 9 answers · asked by Anonymous

2006-10-21 09:08:26 · 7 answers · asked by kliq 1

All I know is that no steel frame building has ever collapsed from fire except for that day. Most people don't even know that 3 trade centers fell that day (1,2, and 7). No plane hit building 7 and it somehow collapsed when there were only fires on 3 floors of the building.

2006-10-21 08:36:26 · 6 answers · asked by Peter F 1

I have a very simple PMA concept. I take a flat plate (plastic), drill a hole through the center and hot glue 4 magnents onto the plate. Each magnent is alternating in current (meaning if you for every positive the two closest magnents are negative). Each magnent is about 2 inches long with a 1 inch gap. I place the plate on a fan axle, screw it in place, and turn said fan on. Now I take a copper wire (just your average copper wire that I stripped from an old fan) and coiled it about 70 times +/- 1 turn (also tried different windings) with a seperation of 1.25 inches meaning that while the magnent passes one end of the coil on a positive the other end of the coil will be meeting a negative. I then take the inner and outer leads and place them on a voltmeter. I then place the stationary winding at distances ranging from 1 mm to 4 inches away from the magnents as they turn. I am unable to produce any voltage (yes I have tested the volt meter). I have altered the speed also. Whats wrong?

2006-10-21 08:16:06 · 2 answers · asked by Anmont 2

2006-10-21 07:19:52 · 14 answers · asked by mark 1

2006-10-21 07:18:13 · 2 answers · asked by frutigurl 2

2006-10-21 07:17:45 · 11 answers · asked by evadsicixelsid 1

when does sound travel faster: at an air temperature of 0 degrees C or 32 degrees C?

2006-10-21 07:15:47 · 5 answers · asked by Kid Icarus 1

2006-10-21 07:15:11 · 9 answers · asked by mark 1

To speak on the cientifica nature of the Interstellar System, and to argue questions as, the nebulas I contend billions of stars representing clouds and electron-stars (or better, saying: plasmáticos crystals). It is necessary to leave well clearly that in these regions the set of the biggest substance distributed in the “Universe” exists. E how much to the theories created for the astrophysical astronomers and, who still nowadays interpret the Sun as stars, some factors indicate that they had been and still they are deluded by the nuclear physics that has as autonomy, to satisfy its research as rules of the atomic nucleus that has its intent energies. With this false interpretation the astrophysical astronomers and, ignore the different types of clouds electron-stars with theories that satisfy its requirements. Example of the names: Galaxies, quasares, By Láctea, nebula of Andrômeda, supernew, misty spirals etc, etc, etc. Gu

2006-10-21 07:14:01 · 1 answers · asked by britotarcisio 6

2006-10-21 07:12:47 · 7 answers · asked by mark 1

To speak on the cientifica nature of the Interstellar System, and to argue questions as, the nebulas I contend billions of stars representing clouds and electron-stars (or better, saying: plasmáticos crystals). It is necessary to leave well clearly that in these regions the set of the biggest substance distributed in the “Universe” exists. E how much to the theories created for the astrophysical astronomers and, who still nowadays interpret the Sun as stars, some factors indicate that they had been and still they are deluded by the nuclear physics that has as autonomy, to satisfy its research as rules of the atomic nucleus that has its intent energies. With this false interpretation the astrophysical astronomers and, ignore the different types of clouds electron-stars with theories that satisfy its requirements. Example of the names: Galaxies, quasares, By Láctea, nebula of Andrômeda, supernew, misty spirals etc, etc, etc.

2006-10-21 07:12:28 · 2 answers · asked by britotarcisio 6

if 2 blocks are to be connected through a line and pulled by a horiztal force, and friction force involvd, one is mass A and one is mass B, and frictional force, find the total force in terms of frictional force, mass A and B.

2006-10-21 06:55:03 · 1 answers · asked by john_lu66 4

wave a, with an amplitude os 3m, meets wave b, with an amplitude of 3m. When A and B overlap, the wave produced (C) has an amplitude of 6 m. descirbe how this looks like and what kind of wave interaction it is.

2006-10-21 06:41:34 · 4 answers · asked by Kid Icarus 1

the bird does'nt get shock as it is not grounded.,but does current
flow through it,it also being a good conductor of electricity

2006-10-21 06:37:56 · 9 answers · asked by Aq 3

AC pushes you away,I have heard
and DC ,we stick to the source,where we touch

2006-10-21 06:34:50 · 6 answers · asked by Aq 3

i need the mathematical formula to convert amperage into ft lbs of torque

2006-10-21 06:25:28 · 3 answers · asked by CLAYTON B 1

http://i21.photobucket.com/albums/b272/Cajunboiler/06_45.gif

A water slide is constructed so that swimmers, starting from rest at the top of the slide, leave the end of the slide traveling horizontally. As the drawing shows, one person hits the water 5.00 m from the end of the slide in a time of 0.500 s after leaving the slide. Ignoring friction and air resistance, find the height H in the drawing in meters.

Now, I know this has to do with the conservation of mechanical energy. For this problem, I think it should be mg(ho) = .5m(vf)^2

Now... I'm thinking I need to use kinematics to find vf but I'm confused on which equation to use.

If this is not how to work it, the please explain it to me where I went wrong.

2006-10-21 06:14:23 · 3 answers · asked by Confused 1

A projectile of mass 0.900 kg is shot straight up with an initial speed of 22.0 m/s.

(a) How high would it go if there were no air friction?

I got this right with 24.7 meters

(b) If the projectile rises to a maximum height of only 16.5 m, determine the magnitude of the average force due to air resistance.

I'm not exactly sure how to calculate the air resistance. Can someone help?

2006-10-21 05:41:17 · 5 answers · asked by Confused 1

2006-10-21 04:33:37 · 3 answers · asked by AntiStyptic 2

Hypothetically, if you could travel at the speed of light in a car, would the headlights work or not?

2006-10-21 04:28:21 · 8 answers · asked by ace1golfguy 1

I don't need the questions done, just some sort of idea of how to start them. Any help would be appreciated.

Oxygen at pressures much greater than 1 atm is toxic to lung cells. Assume that a deep-sea diver breathes a mixture of oxygen and helium (He). By weight, what ratio of helium to oxygen must be used if the diver is at an ocean depth of 47.0 m?
Round your answer to three significant figures

In a period of 1.60 s, nitrogen molecules strike a wall of area 4.2 cm squared If the molecules move at a speed of 340 m/s and strike the wall head-on in elastic collisions, what is the pressure exerted on the wall? (The mass of one molecule is 4.68 x10^-26)
Round your answer to three significant figures.

2006-10-21 03:58:23 · 2 answers · asked by Anonymous

there should be alloys of iron,copper,aluminium

2006-10-21 03:54:26 · 7 answers · asked by SHILADITYA 1

2006-10-21 03:39:51 · 13 answers · asked by Anonymous

Is there any physics to do with barometric pressure involved? Why would it make us sleepy? If it does have to do with barometric pressure and lower pressure reduces our alertness, is there an ideal pressure for maximum alertness and maybe even learning and memorization? Maybe we should pressurize schools so the learning environment is maintained at "fair weather" levels through the dreary winter months. I will be choosing a serious answer as the best answer.

2006-10-21 02:32:55 · 13 answers · asked by wreck_beach 4

2006-10-21 02:20:40 · 3 answers · asked by Anonymous

2006-10-21 02:16:08 · 15 answers · asked by Anonymous

2006-10-21 02:12:31 · 13 answers · asked by Anonymous

2006-10-21 02:03:39 · 5 answers · asked by Anonymous