Physics - October 2006

I need help with my phsyics homework here is a link of the problems i need to do http://go.hrw.com/resources/go_sc/phy/HF2PW10C.PDF it's the problems under additional practice. all i really need are the answers so i can check them with my own

2006-10-30 13:46:30 · 2 answers · asked by shottundercover 1

Radio waves
visible light waves
gamma rays

and how is it dangerous?

another question:what is wrong with near-sighted and far-sighted vision? what can they se best?

bonus: what is the difference between a real & virtual object?

all answers are appreciated!!!

2006-10-30 13:34:31 · 5 answers · asked by Anonymous

Radio waves
visible light waves
gamma rays

and how is it dangerous?

another question:what is wrong with near-sighted and far-sighted vision? what can they se best?

bonus: what is the difference between a real & virtual object?

all answers are appreciated!!!

2006-10-30 13:33:03 · 2 answers · asked by Anonymous

2006-10-30 13:25:24 · 3 answers · asked by Anonymous

2006-10-30 13:19:50 · 4 answers · asked by kintz2010 1

thanks! I have been studying Quantum physics a lot lately, but am not too aware of string theory which keeps popping up in my studies. But from what I have seen, it looks very interesting.

2006-10-30 13:11:55 · 4 answers · asked by Tropicalboy 3

Completely theoretical. But say you had a conveyer belt that rapped completely around the earth and was 1 mile wide and slightly indented. It would run at at say, 100 mph. Then you took another conveyer belt that sat directly onto the first one, and it too traveled at 100 mph ontop of the first conveyer belt. And you kept doing this in succession 20 times. Theoreticaly, couldnt this propel you at 2000 mph in correlation to the earth?

2006-10-30 13:02:03 · 2 answers · asked by Tropicalboy 3

true or false

2006-10-30 12:56:05 · 2 answers · asked by griselda r 1

Ramps and mazes are not allowed. The marble doesnt have to roll on a flat surface.

2006-10-30 12:50:02 · 8 answers · asked by alexkidd86 2

If space were curved and gravity acted on objects like so then faster objects affected the same by gravity as slower objects...right?
Like two baseballs of equal mass are thrown but one travels at a faster velocity the one with the +in velocity will not fall as fast.. Why is this, is this true in a vaccum with no friction? I mean if gravity works because large masses curve space then shouldn't speed be irrelevant?
Im not very familiar to M-phase so please do not mention it or string theory or parallel dimensions.
Please site a source

2006-10-30 12:32:08 · 5 answers · asked by qwe 3

A 3 kg ball is dropped from the roof of a building 176.4 m high. While the ball is falling to earth, a horizontal wind exerts a constant force of 12 N on the ball. How long does it take to hit the floor? And how far from the building does the ball hit the ground?
Answer: 6 seconds, and 72 meters

2006-10-30 12:26:54 · 6 answers · asked by VBallGal 1

if you kicked a ball filled with will it go farther than one with air

2006-10-30 11:53:19 · 5 answers · asked by erik m 1

more specifically i am dealing with the values of kinetic energy when a pendulum swings at the bottom (velocity is recorded through a photogate at the bottom)
Assuming velocity recorded at the bottom is 1.9m/s (squared), and the mass of the object is 1kg, what is the kinetic energy for both values

2006-10-30 11:45:08 · 5 answers · asked by J' K '06 1

A 25 kg bear slides, from rest, 8m down a lodgepole pine tree, moving with a speed of 5.7 m/s just before
hitting the ground. What is the average frictional force that acts on the bear?

2006-10-30 11:41:05 · 2 answers · asked by Shane H 2

this is in regards to prisms for an antique lamp. We cannot tell if they are glass or crystal

2006-10-30 11:38:52 · 11 answers · asked by Rich C 1

Answer: 4.7 x 10^2 seconds
A train has a mass of 1.5 x 10^7 kg. If the train can exert a constant pull of 7.5 x 10^5 N, How long would it take to increase the speed of train from rest to 85 km/h?

2006-10-30 11:34:54 · 2 answers · asked by VBallGal 1

2006-10-30 11:29:38 · 5 answers · asked by J' K '06 1

An elevator starts from rest with a constant upward acceleration and moves 1 m in the first 1.5 s. A passenger in the elevator is holding a 9.2 kg bundle at the end of a vertical cord. The acceleration of gravity is 9.8 m/s^2. What is the tension in the cord as the elevator accelerates? Answer in units of N.

2006-10-30 11:29:30 · 1 answers · asked by Anonymous

Q: A 755 N diver drops from a board 10 m above the water's surface. Find the divers speed 5 m above the waters surface. Then find the divers speed just before striking the water.

Please show me how you got the answer.

2006-10-30 11:27:11 · 3 answers · asked by S.I.N 4

Superman (mass = 78.0 kg) stops a train (mass = 18619 kg) headed for a broken bridge. The train was
initially traveling at 60.0 km/h. During the constant deceleration, the passengers experience an average
horizontal force of 0.410 their own weight. How long does it take for the train to come to a stop?

2006-10-30 11:25:20 · 1 answers · asked by Shane H 2

2006-10-30 11:24:32 · 3 answers · asked by Anonymous

Because nothing else seems to happen in the vastness of space.
Why can't some alien race from the depths of space invade us and spice things up a bit? Little Green Prime Minister would be nice for a change.

2006-10-30 10:24:05 · 11 answers · asked by Barbara Doll to you 7

How long does it take a slide loving pig to slide 2 m down a 30° incline (the incline is measured from the
horizontal) with a coefficient of static friction of 0.35 and a coefficient of kinetic friction of 0.30?

2006-10-30 10:16:42 · 2 answers · asked by Shane H 2

Two snowy peaks are h = 850 m and 750 m above the valley below. A ski run extends down from the top of
the higher peak and then back up to the top of the lower one, with a total length of 3 km and an average slope
of 30°. A skier starts from rest on the higher peak. If the snow is slick so that friction may be neglected, at
what speed will he arrive at the top of the lower peak if he just coasts without using his poles?

2006-10-30 10:07:22 · 2 answers · asked by Shane H 2

2006-10-30 10:03:35 · 5 answers · asked by Anonymous

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Total answers:
Best answers: Determining a Spring force?
A massless spring is between a 1-kg mass and a 3-kg ,mass, but is not attached to either mass. Both masses are on a horizontal frictionless table. In an experiment, the 1kg mass is held in place and the spring is compressed by pushing on the 3-kg mass. The 3kg mass is released and moves off with a speeed of 10 meters per second.

How do I determine teh final velocity of each mass relative to the table after the masses are released?

2006-10-30 09:51:27 · 2 answers · asked by Alex S 2

The other three forces seem to hold together mass with utmost strength,while gravity pulls it all together???......Tom Science 3

2006-10-30 09:43:50 · 3 answers · asked by Thomas M 2

the pressure of atmosphere is 1 atm while there is not any air pressure in the space and then molecules of air gases tend to escape from the earth to the space(gradually though).but why after millions and millions of years, we have still air on the planet.
And will be one day when there is not any air left on the planet earth?

2006-10-30 09:35:58 · 7 answers · asked by Ormoz 3

Figure >> http://www.webassign.net/sb5/p10-32alt.gif

Find the mass m needed to balance the 1540 kg truck on the incline shown in Figure P10.32. Assume all pulleys are frictionless and massless.

2006-10-30 08:48:52 · 1 answers · asked by flossie116 4

an object with an initial velocity V in the horizontal direction, and 0 in the vertical direction. How far will this object travel in the horizontal direction as it falls through a height h?

2006-10-30 08:47:21 · 1 answers · asked by Loko 2