Physics - March 2007

help me with this

how will i calculate for the resistance of a Nichrome wire 0.50 mm in diameter and 1.25 m long?

2007-03-24 09:13:34 · 1 answers · asked by mulan 1

i cant understand!,huhu

problem: two charges of equal magnitude exert an attractive force of 4.0 x 10^-4 on each other. If the magnitude of each charge is 2.0 uC, how far apart are the charges?

thanx.

2007-03-24 09:11:15 · 2 answers · asked by mulan 1

when they both travel in waves?

2007-03-24 08:36:36 · 6 answers · asked by bavwill 3

2007-03-24 08:24:01 · 6 answers · asked by khadεsia. 2

I know what happens, but I can't explain why .

2007-03-24 08:14:59 · 2 answers · asked by Patricia L 1

A series circuit contains a resistor with R = 24 ohms, an inductor with L = 2 H, a capacitor with C = 0.005 F, and a generator producing a voltage of E(t) = 12 sin(10t). The initial charge is Q = 0.001 C and the initial current is 0.
Find the charge at time t.

Q(t)= ??

2007-03-24 08:12:47 · 3 answers · asked by Anonymous

A series circuit contains a resistor with R = 24 ohms, an inductor with L = 2 H, a capacitor with C = 0.005 F, and a 12 V battery. The initial charge is Q = 0.001 C and the initial current is 0. Find the charge and current at time t.
Q(t)= ??

2007-03-24 08:11:34 · 2 answers · asked by Anonymous

ARE THERE ANY REAL PHYSICS OUT THERE? IF SO DO YOU BELEIEVE IN IT?

2007-03-24 07:32:25 · 12 answers · asked by clare w 1

2007-03-24 07:25:21 · 10 answers · asked by vet4927 1

2007-03-24 07:16:57 · 8 answers · asked by Anonymous

I have in mind a device that will work with air, so , as long as it stays on earth, can we say it is a Perpetuum Mobile?

2007-03-24 07:16:40 · 1 answers · asked by tigerhawkro 2

2007-03-24 07:13:32 · 5 answers · asked by hollyberry 2

give me two reason why one star may appear brighter than another star???

2007-03-24 06:41:27 · 10 answers · asked by Bianca S 1

A window of mass 5 kg and length 0.75m is being held open at an angle of 40 from the vertical by a duck pushing it out horizontally from the bottom.

a) How much force must be provided to hold the window statically?

b) What horizontal and vertical reaction forces must the hinges at the top provide when the window is held open?

2007-03-24 06:19:45 · 1 answers · asked by Anonymous

A charged particle with a charge-to-mass ratio of q/m = 5.9 108 C/kg travels on a circular path that is perpendicular to a magnetic field whose magnitude is 0.70 T. How much time does it take for the particle to complete one revolution?

2007-03-24 05:54:22 · 1 answers · asked by madison c 1

A generating station is producing 1.0 106 W of power that is to be sent to a small town located 6.0 km away. Each of the two wires that comprise the transmission line has a resistance per kilometer of length of 5.0 10-2 /km.
(a) Find the power lost in heating the wires if the power is transmitted at 1050 V.
(b) A 100:1 step-up transformer is used to raise the voltage before the power is transmitted. How much power is now lost in heating the wires?

2007-03-24 05:53:02 · 1 answers · asked by madison c 1

2007-03-24 05:34:29 · 4 answers · asked by Anonymous

This question was put up in a hurry, therefore it's extremely brief.
P.S.: I know the photon's antiparticle is actually the photon itself, but what about the graviton's antiparticle (presuming the graviton exists although it hasn't been discovered yet) ?

2007-03-24 04:33:32 · 7 answers · asked by Mihai M 2

I was watching a documentary about space and atmosphere which claimed that if you didn't wear a space suit, your blood would heat up and eventually boil as you ascended due to the reduction in air pressure. Is this true and what is the physics behind it?

2007-03-24 04:19:26 · 8 answers · asked by Anonymous

It is for 8th ICSE and should cover the topics of motion ,magnetism along with electricity, fluids and mirrors.It should have the solutions to the problems too.Thank you!

2007-03-24 04:13:25 · 6 answers · asked by gj 4

2007-03-24 03:55:24 · 5 answers · asked by Anonymous

2007-03-24 03:53:12 · 1 answers · asked by .::aPuRv::. 1

Okay, I know antimatter is in Angels & Deamons by: Dan Brown, but it really exists. I am fairly sure that the United States has antimatter, but do other countrys?

2007-03-24 03:17:56 · 10 answers · asked by cats_on_brodway 2

2007-03-24 03:10:01 · 4 answers · asked by robwil 1

what is negative energy and negative mass?

And how can they be used to time travel?

2007-03-24 02:49:43 · 7 answers · asked by sh 1

I want an in depth answer to this one, please.

2007-03-24 02:28:41 · 5 answers · asked by Anonymous

2007-03-24 01:47:16 · 6 answers · asked by Eddu 1

once i was coming from bike at a 100m dist from the road.i was able to see the water on the road.but when as i came nearer to that place water was'nt there.i thought it was illusion .i want to know what is the reason for the illusion?

2007-03-24 01:39:19 · 10 answers · asked by RBS 1

When i was in afghanistan, we had bottled water, when we took it out of the fridge, it was cold but not frozen. When I opened it, you could watch it freeze, it wouldnt be solid but it would turn the entire bottle to slush, it was liquid before. Why did this happen?

2007-03-24 01:37:01 · 4 answers · asked by pnut698 1

2007-03-24 01:31:55 · 11 answers · asked by RBS 1