Physics - March 2007

A series RLC circuit has a resonance frequency of 2000/Pi Hz. When it is operating at a frequency of w>w0, XL = 13.0 and XC = 9.0 . Calculate the values of L and C for the circuit.

C = µF
L = mH

2007-03-23 05:10:30 · 1 answers · asked by joe p 1

what is the formula for distance i forget. isnt it d=r*t ??

2007-03-23 05:03:35 · 6 answers · asked by Anonymous

2007-03-23 04:54:50 · 7 answers · asked by Crystal D 1

2007-03-23 04:52:25 · 5 answers · asked by raja m 1

to investigate how a simple pendulum depends on
1. the length of the thread
2.density of the bob.

it should include:
1. title
2.Procedure
3.Readings to be taken
4. Precautions:- (i) accuracy
(ii) safety

Thanks

2007-03-23 04:46:14 · 3 answers · asked by Mystic healer 4

Small space module has circular orbit around the Earth
with period T = 2 hours. Astronaut in open space gear
(total mass M = 120 kg) is on exactly the same orbit
d = 90 m behind the module. After completing his
calculations, astronaut tosses his calculator (m = 200 g)
with certain velocity, and after time T/2 = 1 hour reaches
his module.

What was astronaut's solution (speed and direction of the toss)?

2007-03-23 04:26:31 · 1 answers · asked by Alexander 6

Please give a few examples too!

2007-03-23 04:23:48 · 2 answers · asked by Anonymous

A series RLC circuit has a resonance frequency of 2000/Pi Hz. When it is operating at a frequency of w>w0, XL = 13.0 and XC = 9.0 . Calculate the values of L and C for the circuit.

C = µF
L = mH

2007-03-23 04:22:34 · 1 answers · asked by Anonymous

2007-03-23 04:14:38 · 3 answers · asked by eliiiiii 1

Trying to see what the payback would be if I purchased new , more efficient flouescent light fixtures for my shop. Current useage is 1.05 amps per fixture (T-12)and the new ones (T-8) draw .94 amps. Thanks!

2007-03-23 04:06:05 · 1 answers · asked by Gonzoe 1

2007-03-23 03:52:07 · 4 answers · asked by p_jakovljevic 1

Certainly there would be mass destruction...? Shifts in sea currents; massive tsunami's; weather pattern impact; electro-magnetic chaos... What are your thoughts?

2007-03-23 03:46:06 · 7 answers · asked by Anonymous

at rest. find the velocities of the block A after the collision. assume all motion is one dimension.

2007-03-23 03:38:43 · 4 answers · asked by ravisej1990 1

I want to see if anyone knows the anwser to this question.

2007-03-23 03:19:23 · 8 answers · asked by Anonymous

ok so students were doing some experiment and a gas was produced. they think the gas is hydrogen, how can they be sure?

does it turn back into water in contact with oxygen?

2007-03-23 03:08:12 · 4 answers · asked by ♥ hey! 2

the egg drop project

2007-03-23 03:04:06 · 6 answers · asked by gmicester07 1

A series RLC circuit has a resonance frequency of 2000/ Hz. When it is operating at a frequency of w>w0, XL = 13.0 and XC = 9.0 . Calculate the values of L and C for the circuit.

C = µF
L = mH

2007-03-23 02:54:10 · 1 answers · asked by Anonymous

1) An aluminium window frame feels cold when you touch it, but a wooden frame feels warm. Why?

2)Its is much safer picking up hot dishes with a dry tea-towel than with a wet one. Why?

2007-03-23 02:49:38 · 4 answers · asked by shaz 2

Okay i have three problems that I cant seem to be able to do. For some reason i cant do this. Well here are the problems. can someone help me?

1. The whistle on a train has a frequency of 440 Hz. The train is moving at 35.0 m/s toward a person standing on the platform. If sound travels at 345 m/s, what is the wavelength of the sound heard by the person?


2. An auto with a siren having a frequency of 365 Hz is approaching a stationary detector at a speed of 75 km/h. What is the frequency of the siren appear to be if sound travels at 345 m/s?

**For those two, the doppler shift equation is to be used right? But i dont understand how to do it.**

3. A pipe open at both ends is 55 cm long. What are the wavelenghts of the fundamental and the first three overtones?

So i really need help on these problems! If anyone can help me than i would be realllly grateful!

2007-03-23 02:44:46 · 2 answers · asked by xobengalicutiexo 1

2007-03-23 02:33:22 · 5 answers · asked by craig 1

With all the info on how the big bang 14.7 billion years created everything, seems causing life to continue would not be a challenge. Does anyone know how? james

2007-03-23 02:02:47 · 9 answers · asked by james h 2

2007-03-23 01:25:15 · 8 answers · asked by Sunday P 5

2007-03-23 01:14:50 · 4 answers · asked by Anonymous

during a photolectric experiment if the incident photons having energy less than the workfunction of the element strike it then by absorbing more photons cant a electron get out of the binding atom?

2007-03-23 00:40:49 · 1 answers · asked by anon 2

2007-03-23 00:37:04 · 6 answers · asked by Anonymous

Light waves are easily interupted by objects. In communication system EM waves are not interupted by objects why? Even in the closed room also we can get signals.

2007-03-23 00:29:21 · 2 answers · asked by lightman 1

2007-03-23 00:09:29 · 7 answers · asked by ? 1

the velocity of a particle moving in the xy plane is given by v = (6.0t - 4.0t^2)i + 8.0j, with v in meters per second and t (> 0) is in seconds.

When does the speed equal 10m/s? I can't figure this out, although I figured out that the velocity is never zero and the acceleration is zero at .75seconds

2007-03-23 00:05:12 · 3 answers · asked by Anonymous

1. Where are magnetic poles located on a common bar magnet?
2. In what way are magnetic poles very different from electric charges?
3. What is a magnetic domain?
4. Why is iron magnetic and wood not?
5. What happens to the bottom of the magnetic field about an electric current when the direct current is reversed?
6. Why are electromagnets stronger when constructed with super conducting coils?
7. What effect does the magnetic field about the earth have on cosmic ray bombardment?
8. What happens to the direction of deflection when the current in a wire is reversed?
9. What is the function of a galvanometer?
10. What is a galvanometer called when calibrated to read current and voltage?
11. In what way does the galvanometer is similar to the electric motor?
12. What does the magnetic declination mean?
13. What are magnetic pole reversals?
14. What are the Van Allen Radiation Belts?
15. What is the cause of Aurora Borealis?

2007-03-22 23:33:48 · 3 answers · asked by Enchantress_Czarina 1

QUESTION- Two charges q1 & q2 are placed 30cm apart ,as shown in the figure,(i have described below) A third charge q3 is moved along arc of circle of radius 40cm from point C to D .The change inpotential energy of system is kq3/ 4(pi)(ipsilin zero) then k=?
ANSWER:-
(a)8q2, (b)6q1, (c)8q1, (d)6q2

please say value of k=? & explain briefly

GIVEN PICTURE IS DESCRIBED AS GIVEN
Here A is centre of circle & a charge is placed (q1) , C & D are points on circle such that AC & AD are radius of circle (=40cm) & angle CAD = 90 .A charge q3 is placed at pointC & q2 is a charge at point B( a point on radius AD & its distance from point A is 30cm)

2007-03-22 23:32:19 · 6 answers · asked by Anonymous