Physics - November 2006

friction pulley. One end of the rope is connected to box2 and the other is connected to box3. The weights of the three boxes are W1=55N, W2=35N, W3=28N. Determine the magnitude of the normal force that the table exerts on box 1..............The answer is 62 N, i just have no idea how to get to that...please help

2006-11-10 16:36:39 · 5 answers · asked by Vanessa M 1

if there are seven, 350 pound men, traveling in the back of a pick-up truck going 100 miles per hour, and this truck slows to 25 miles per hour for 5 minutes to pick up another 350 man, how long will it take this truck to travel 100 miles????

2006-11-10 16:18:59 · 6 answers · asked by bigsky 1

2006-11-10 16:08:58 · 28 answers · asked by Anonymous

With a single prism, as we all know, white light is broken into all of the colors in a rainbow.

What happens if you put another prism in series with the first? Does it recombine all the colors back into white light, or does it further refract the rainbow colored light?

I’d test this if I had two prisms but I don’t. Hoping someone has either done this simple experiment, or knows enough about optics to know the answer. 10pts to the winner… :-)

2006-11-10 16:08:04 · 4 answers · asked by taotemu 3

When you smell Orange juice for an examble does that mean we're inhaling small particles from the juice? if not then what is the matter of smell (odor, perfume)?

2006-11-10 15:51:18 · 12 answers · asked by firewireo 1

if we have 200, four-hundred-pound men in a 1975 bus going 180 miles per hour, and 200 of these men are mooning out the window, how long will it take this bus to go 200 miles if one of these men falls out, and the bus speed drops to 110 miles per hour??
this is figuring the mooning bus member fall out at the 100 mile mark...

2006-11-10 15:42:00 · 4 answers · asked by bigsky 1

why not a oscillating point particle

2006-11-10 15:36:18 · 4 answers · asked by Anonymous

2006-11-10 15:25:29 · 1 answers · asked by lisat2yr 1

Ball C, moving in the positive direction of an x axis at speed v, collides with stationary ball D at the origin. C and D have different masses. After the collision, C moves in the negative direction of the y axis at speed v/2. (a) in what direction does D move? (b) show that the speed of D cannot be determined from the given information.

2006-11-10 15:02:32 · 2 answers · asked by Galaxy D 2

Particle C and particle D are held together with a compressed spring between them. When they are released, the spring pushes them apart and they then fly off in opposite directions, free of the spring. The mass of C is 2.0 times the mass of D, and the energy stored in the spring was 60J. Assume that the spring has negligible mass and that all its stored energy is transferred to the particles. Once that transfer is complete, what are the kinetic energies of (a) particle C and (b) particle D?
explain your answer pleas.

2006-11-10 14:33:15 · 5 answers · asked by Galaxy D 2

The period of oscillation of a spring-and-mass system is 0.51s and the amplitude is 4.9cm. What is the magnitude of the acceleration at the point of maximum extension of the spring?

2006-11-10 14:31:03 · 5 answers · asked by brilliantdance12 1

Even if you know one of these things please contribute.

It would also be interesting to compare its energy with a bullet from of a modern army rifle.

2006-11-10 14:16:54 · 3 answers · asked by Anonymous

I know you might think im a bit dumb for not knowing the answer to this question...but im not much of a physics person,,im better on my english and economics....=)...can u please help me on this question?
1] describe all the energy changes that occur when an arrow is fired from a bow and enters a target. Include the energy changes at the bow, during the flight of the arrow, and the target.
( I dont know what else to right apart from potential energy, total energry and kinetic energy)

2006-11-10 14:04:11 · 2 answers · asked by Anonymous

Under the influence of a complicated collection of physical fields, the altitude h of a rocket from its moment at launch until its fall to Earth is given by the formula h(t)= t^4 - 8t³ + 375 where the altitude h is measured in feet and the time launch t is measured in seconds. What is the initial altitude? When does the projectile impact Earth? What is the max. altitude? What is its max upward velocity??? What is its max downward velocity??? What is its max upward acceleration??? What is its max downward acceleration???

2006-11-10 14:01:38 · 4 answers · asked by hippiechic2241 1

What is the dispersion of red light by a prism?
What is the dispersion of white light by a prism?

2006-11-10 13:41:17 · 2 answers · asked by Tavis T 1

2006-11-10 13:38:38 · 7 answers · asked by Link 4

i am trying to develop a theory based on a device that works both on compression an extreem vacum of pure water.and the intention to benefit the public in a public forum

2006-11-10 13:26:36 · 4 answers · asked by stratoframe 5

if we have a bus, going at 90 miles per hour down a hi-way, containing 35, four-hundred pound men, how long will it take the bus to go 50 miles???

2006-11-10 13:05:04 · 2 answers · asked by jake 1

Piston 1 in Figure P9.24 has a diameter of 0.30 in. Piston 2 has a diameter of 1.3 in. In the absence of friction, determine the force, , necessary to support the 500 lb weight.

here is the url to the figure: http://www.webassign.net/sf/p9_24.gif...

ive done this about 10 different ways and keep getting the wrong answer. any help will be appreciated, thanks a lot guys!

2006-11-10 13:03:08 · 3 answers · asked by Anonymous

How do I measure the veloctiy of a satellite geostationary to the earth? Also, how do I measure the radius of the orbit, from Earth to the satellite?

2006-11-10 12:36:29 · 3 answers · asked by Robert G 1

A man is standing on a spring. If the spring is compressed 17m, then released...

How high will the man fly?

How fast will he be going when he is released?

If he lands in a hole 10m deep, how fast will he be going when he hits the pillows at the bottom?

Variables:
mass = 80 kg
k = 10 850 N/M
x = 17 m

2006-11-10 12:16:26 · 2 answers · asked by Anonymous

During the battle of Gettysburg, the gunfire was so intense that several bullets collided in mid-air and fused together. Assume a 5g union musket ball was moving right at a speed of 250m/s, 20 degrees above the horizontal. A 3g confederate ball was moving to the left at a speed of 280m/s, 15 degrees above the horizontal. Immediately after they fuse together.

1.what is their velocity??


2.what is their kinetic energy??

3.was this elastic or inelastic, why?

2006-11-10 11:55:54 · 1 answers · asked by Shane W 1

Don't worry I am not about to dispose a human body. I am in the process of researching how to burn corpse much faster and more economical.

2006-11-10 11:45:57 · 3 answers · asked by louie0894 2

2006-11-10 11:00:09 · 6 answers · asked by Anonymous

Piston 1 in Figure P9.24 has a diameter of 0.30 in. Piston 2 has a diameter of 1.3 in. In the absence of friction, determine the force, , necessary to support the 500 lb weight.

here is the url to the figure: http://www.webassign.net/sf/p9_24.gif

ive done this about 10 different ways and keep getting the wrong answer. any help will be appreciated, thanks a lot guys!

2006-11-10 10:57:08 · 2 answers · asked by Anonymous

the unit (Newton) or the unit (Dyne) for the force ...
ex: Kg is bigger than gm ..
km is bigger meter ... like that.

2006-11-10 10:47:34 · 6 answers · asked by Anonymous

2006-11-10 09:55:30 · 11 answers · asked by shababe456 1

We have 6, four-hundred pound men, in the back seat of a 1976 Gremlin traveling at 105 miles per hour, if 2 of the 400 men jump out at the 10 mile mark, and the car gains 25 more miles per hour, how long will it take the car to travel 50 miles???

2006-11-10 09:45:30 · 5 answers · asked by Anonymous

We have twelve, 425 pound men, strapped on top of a bus, if they pee at a velocity of 25 miles per hour, and we have a bus traveling at 90 miles per hour down a hi-way, and if their pee angle is 35 degrees, what is the velocity of their pee???? (in miles per hour)

2006-11-10 08:56:39 · 1 answers · asked by Anonymous

2006-11-10 08:20:35 · 3 answers · asked by Anonymous