Physics - March 2007

An organ pipe, open at both ends, produces the middle C note (265Hz) when sustaining a standing wave at its third harmonic, what is the fundamental frequency of the organ pipe?

2007-03-07 18:37:47 · 1 answers · asked by Anonymous

is angular velocity and angular frequency same? if not please explain the difference. but we use the symbol w for both.

2007-03-07 18:02:31 · 3 answers · asked by aparna 1

This is for a physics lab writeup. I need a concrete scientific explanation, please.

2007-03-07 17:58:45 · 5 answers · asked by malbassam@sbcglobal.net 1

-what causes it?
-Yr 12 physics question on wave interactions

2007-03-07 17:55:49 · 4 answers · asked by Anonymous

I need help with the following problem, I tried doing it so many times but I get stuck.
A 4 kg sleigh has an initial speed of 10 m/s in the peak of a 34° slope. If uk = 0.2, ¿what distance will the sled travel when its speed reaches 30 m/s?

What I tried to do was:
[ (4 kg)(9.8 m/s)(s * sin 34) + [(4 kg)(10 m/s)^2]/2 ] = [ [(4 kg)(30 m/s)^2]/2 + (fk * s) ]

I got fk with =
Fy = 0
Fn = 39.2 N (Sin 56)
Fn = 32.49 N

fk = MkFn
fk = (0.2) (32.49 N)
fk = 6.49 N

I really need a hand on this one. Thanks in advance.

2007-03-07 17:50:55 · 3 answers · asked by ddeity_inc 3

2007-03-07 17:45:01 · 3 answers · asked by matthewj101 1

I consider myself fairly savvy about science, but I read something odd in a physics today. It related electricity and magnetism to the electromagnetic spectrum. It hit me funny.

Electricity is the motion of electrons. So is magnetism. The electromagnetic spectrum is the wide range of wavelengths of "light" or energy. So the electro-magnetic spectrum actually includes neither electricity nor magnetism? Is that correct? Am I missing something? isn't that an odd trick of language if I'm right?

Light is fundamentally different from electricity right?

2007-03-07 17:20:29 · 12 answers · asked by Anonymous

2007-03-07 17:01:56 · 11 answers · asked by NENA 1

2007-03-07 17:01:04 · 3 answers · asked by "A!" 1

Scientists seem worried about entropy & time winding down.

But they can't seem to find the beginning or end of the universe. Seemingly, it is infinite so far as we can tell.

If space is infinite, infinite time is also required to travel infinitely through space, isn't it?

2007-03-07 16:39:39 · 3 answers · asked by Anonymous

also why will it not bend when the angle of incidence is zero?

2007-03-07 16:38:48 · 2 answers · asked by jset1989 2

If all infinity collapsed & were destroyed, wouldn't there still be infinite space, & therefore time?

Even if it was infinite empty space?

You can't compress all there is down to the tiniest dot of nothing at all, can you?

What would it look like were this even possible? Or would there be nothing at all to look at?

2007-03-07 16:33:14 · 5 answers · asked by Anonymous

2007-03-07 16:29:41 · 11 answers · asked by ket 2

why the classical theory fails to support the observed cut-off frequency?

2007-03-07 16:27:35 · 1 answers · asked by dania 1

I'm looking for an experiment that requires easy-to-find (most likely household) items and little time. =] Please and thank you!

2007-03-07 16:26:41 · 2 answers · asked by Anonymous

Assuming the velocity is perpendicular to the magnetic field, determine the path of the proton in the field?

2007-03-07 15:50:49 · 3 answers · asked by Anonymous

current of unknown magnitude is sent though both wires. The wires are 26.5 cm long and have a center-to-center separation of 0.0525 cm.

Find the current...

2007-03-07 15:49:26 · 1 answers · asked by Anonymous

Can someone please explain to me what that means and where it is used i know it has to do with the photoelectric effect but when will be used any help will be appreciated thanx

2007-03-07 15:47:47 · 2 answers · asked by Bayslappers 1

I'm having trouble with the whole "Right to left" and "Left to Right" convention. What are these directions relative to? An example problem would be nice.

2007-03-07 15:46:46 · 2 answers · asked by Raul C 1

2007-03-07 15:41:24 · 14 answers · asked by ani 1

example: The void of space is nothing except just that space, within which time passes but what if there were absolutely nothing there...including space and time. can and did there ever exist such a state?

2007-03-07 15:37:19 · 11 answers · asked by octonaut 1

A train travels 190 kilometers in 3.0 hours, and then 120 kilometers in 2.0 hours. What is its average speed?

2007-03-07 15:31:41 · 4 answers · asked by Anonymous

a) What new force will exist if qA is doubled?
(b) What new force will exist if qA and qB are cut in half?
(c) What new force will exist if d is tripled?
(d) What new force will exist if d is cut in half?
(e) What new force will exist if qA is tripled and d is doubled?

2007-03-07 15:24:48 · 1 answers · asked by cqcrazy07 1

If they are moved so that they are one-fourth as far apart, what force is exerted?

2007-03-07 15:23:10 · 1 answers · asked by cqcrazy07 1

A bulb thermometer gives an indoor temperature reading of 21 c. A digital thermometer in the same room gives a reading of 20.7 c. Which device is more precise? Explain.

2007-03-07 15:21:59 · 6 answers · asked by Anonymous

In what state of matter (solid, liquid, or gas) do particles move most rapidly?

2007-03-07 15:11:38 · 14 answers · asked by Steven 1

How strong is the electric field that will suspend an oil drop that carries two extra electrons and weighs 6.9x10^-15N?

I know you have to use the formula E = F/q
where E is the electric field and F is the weight. How do you get the q?

2007-03-07 15:07:29 · 2 answers · asked by Anonymous

Is there ever more or less of infinity?
Or does it never change size?

Scientifically, is infinity a constant, or variable?

If more is never added to infinity, & it always stays the same size, then this means:

Infinity is unchanging, time is a loop, & history repeats.
Is this all there is to it?

Can we map infinity?

2007-03-07 15:05:11 · 8 answers · asked by Anonymous

had this cool idea the other day. One of the 1st laws of Thermodynamics says hot air rises and cool air falls. I live in a two story home and in the summer time all is well but in the winter time the second floor is hot as heck while the first floor maintains the setpoint of the thermostat. for the last couple of years, during winter time, I have been closing the diffusers on the second floor and this has worked fairly well but is no fun. I want to go overboard with overcomplicating this so I got ahold of some damper actuators that are 0-10v and I figured I would install another stat (RTD) to drive the motor to maintain temperature -- "easier said than done"!. how do you get a modulated signal out of a constant source without going to Graingers and buying there PID controllers that are way overpriced?

2007-03-07 14:58:59 · 1 answers · asked by Anonymous

If nothing can go faster than the speed of light, and the temperature of something depends on how fast its molecules are moving, does that mean that there is such a thing as a temperature limit?

2007-03-07 14:52:34 · 1 answers · asked by creepy_mitch 2