Physics - August 2007

what is determined the rapidly of the waveform?

2007-08-31 21:23:36 · 2 answers · asked by Anonymous

I've found in Wikipedia but it doesn't say anything about the theory of operation of the motor. If anyone has or knows, please tell me in a clear way, which is easy to understand.

2007-08-31 19:36:48 · 6 answers · asked by english_improve 3

The minimum speed of a proton to break atoms?
The minimum speed of proton+neutron to break atoms?
The same about neutrons, electrons

2007-08-31 18:11:29 · 3 answers · asked by Anonymous

Running in a straight line from A to B in the rain arriving at point B.
Note that it is assumed that there is no wind and that the rain is steady and evenly distributed throughout the run.

2007-08-31 17:24:45 · 5 answers · asked by M-Squared 2

A record of travel along a straight path is as follows:
1. Start from rest with constant acceleration of 2.05 m/s2 for 20.0 s
2. Constant velocity for the next 2.70 min
3. Constant negative acceleration 8.77 m/s2 for 4.73 s
(a) What was the total displacement for the complete trip?
m
(b) What were the average speeds for legs 1, 2, and 3 of the trip as well as for the complete trip?
m/s
m/s
m/s
m/s

2007-08-31 17:16:26 · 2 answers · asked by ags101 2

2007-08-31 16:58:58 · 6 answers · asked by Anonymous

2007-08-31 16:55:42 · 3 answers · asked by puppy 1

http://youtube.com/watch?v=gLvIo_vGq7U

Is that really Albert Einstein in that video?

2007-08-31 16:46:18 · 3 answers · asked by Crystalline As Dew 2

for instance, with Coulomb's Law, the fact that opposite charges attract enables chemical bonds to be built, enabling production of amino acids, and letting life live on earth.

2007-08-31 16:20:21 · 14 answers · asked by isuckatphysics 2

My answer was ~1000...but im not sure about the reasoning.
Could you please help me with this problem?

"A hard rubber ball, realeased at chest height, falls to the pavement and bounces back to nearly the same height. When it is in contact with the pavement, the lower side of the ball is temporarily flattned. Suppose the maximum depth of the dent is on the order of 1cm. Compute an order of magnitude estimate for the maximum acceleration of the ball while it is in contact with the pavement"

2007-08-31 16:08:22 · 3 answers · asked by Anonymous

2007-08-31 16:05:30 · 5 answers · asked by mtnetr 2

A body moving with uniform acceleration has a velocity of 15.5 cm/s when its x coordinate is 3.59 cm. If its x coordinate 1.87 seconds later is -8 cm, what is the magnitude of its acceleration?

Can you show your work too? Thanks.

2007-08-31 15:27:03 · 2 answers · asked by robert 6

A record of travel along a straight path is as follows:
1. Start from rest with constant acceleration of 2.05 m/s2 for 20.0 s
2. Constant velocity for the next 2.70 min
3. Constant negative acceleration 8.77 m/s2 for 4.73 s
(a) What was the total displacement for the complete trip?
m
(b) What were the average speeds for legs 1, 2, and 3 of the trip as well as for the complete trip?
m/s
m/s
m/s
m/s

2007-08-31 14:54:09 · 3 answers · asked by ags101 2

How dangerous is radiation?
Anyone who experienced something terrible related to radiation?

2007-08-31 14:38:08 · 4 answers · asked by Kauori 1

Does a heavier bob make the swing of the pendulum swing faster or slower or not even change it?

2007-08-31 13:53:20 · 0 answers · asked by Bridget M 1

this is a experiment that I have to do before wednesday september 5th! the holes are very small (2-3 mm) and you have to mesure every 5 seconds the level of the water in the bottle to do a graph! the question that I have to anwser is what is the salt doing in this experiment !
thank you very much if someone can help me !!

2007-08-31 13:13:08 · 3 answers · asked by Anonymous

A ball with an original momentum of +3.5 Kg m/s hits a wall and bounces straight back without losing any of its kinetic energy.
The change in the momentum of the ball is :
a)zero
b)-3.5
c)7
d)3.5
e)-7

2007-08-31 12:43:00 · 2 answers · asked by Anonymous

A dollar bill is about 15.5 cm long. If 6 trillion dollar bills were laid end to end around the Earth's Equator, how many times would they encircle the Earth? Take the radius of the Earth to be about 6378 km.

2007-08-31 12:28:16 · 4 answers · asked by Anonymous

A commuter train travels between two downtown stations. Because the stations are only 1.18 km apart, the train never reaches its maximum possible cruising speed. During rush hour the engineer minimizes the travel interval t between the two stations by accelerating for a time interval t1 at a1 = 0.100 m/s2 and then immediately braking with acceleration a2 = -0.360 m/s2 for a time interval t2. Find the minimum time interval of travel t and the time interval t1.

2007-08-31 12:23:41 · 1 answers · asked by surfing86 2

If one micrometeorite (a sphere with a diameter of 2.3 10E-6 m) struck each square meter of the Moon each second, how many years would it take to cover the Moon to a depth of 1.0 m? (Hint: Consider a cubic box, 1.0 m on a side, on the Moon, and find how long it would take to fill the box.)

2007-08-31 11:50:45 · 1 answers · asked by Anonymous

1.0974 x 10^7 m^-1 ...A scientist.. Who?

2007-08-31 11:43:13 · 3 answers · asked by *-whitz-* 4

I had tried to jerk it many times but the bubbles still persists. Thanks a lot!!!

2007-08-31 11:24:09 · 2 answers · asked by Niraj M 2

I have tried to understand it, with difficulty, and have come away with the conclusion that it means the observable universe exists only when we observe it. It's kind of like a whole lot of potential realities exist and we create the universe from them.
Any thoughts??
Don't be too hard on me, I'm a math guy who gave up on physics at quantum mechanics.
Too bad I had to side with Einstein. Perhaps God does play dice.

2007-08-31 11:20:18 · 3 answers · asked by William B 4

What is the magnitude of plane that leaves the airport and flies 140 km at 68.0 degrees east of north and then changes direction to fly 240 km at 48.0 degrees south of east, after which it makes an immediate emergency landing in a pasture?

2007-08-31 11:12:18 · 1 answers · asked by Anonymous

The weigth of the crown in air is 214.5 troy oz.

According to current prices,
http://finance.yahoo.com/futures?t=metals
how much money did the goldsmith lost
in the course of his fraud?

2007-08-31 10:55:30 · 1 answers · asked by Alexander 6

Question 1)A moving magnetic field will produce which of the following?
a)A magnetic polar region
b)A volt.
c)A current.
d)A change in magnetic poles.
e)A moving electrical field
Question 2)How many neutrons are in an isotope of sodium when the atomic mass is 26.2?
a)1
b)2
c)3
d)4
e)5
Question 3)How can you generate a static charge on an object?
a)friction
b)induction
c)conduction
d)transfer
Question 4)Which chemical has the lowest pH?
a)salt
b)lemon juice
c)soap
d)battery acid
e)drain cleaner

There are multiple answers for Question 1 and 3.
Please help me.
Question #
Answer a,b,c,d,e

2007-08-31 10:09:49 · 3 answers · asked by evil_tissue 1

2007-08-31 10:01:51 · 3 answers · asked by dell10314 1

The 10 kg block is acted upon by a horizontal force of 100 N. Coefficent of static friction=0.60, coefficient of kinetic fricton =0.40, g=9.8 m/s2.

2007-08-31 09:39:59 · 4 answers · asked by Anonymous

At the right altitude would one jump from everyone on the plane change it's trajectory?

2007-08-31 09:18:07 · 5 answers · asked by babycakes2877 2

please tell me your opinion?

2007-08-31 09:11:12 · 6 answers · asked by Alexander 6