hi,
why are mains xfmrs so big compared to the xfmrs in switch mode power supplys?
thx. Alf.-Transformers working at higher frequencies can be smaller with ferrite cores, instead of laminated steel.
Is it 3*10^8/4000?
If not what?
Thanks.-Depends on the refractive index of the fibre.Say it is 1.5.
Speed of light in fibre = 3x10^8 / 1.5 = 2x10^8 m/s
Time = distance /speed = 4000 / (2x10^8) = 2
In physics.Is there a maximum brightness of which light can shine? And temperature? And velocity. ?? Thanks.-The only upper limit to intensity of light, or temperature, is the amount of energy availab
Please, Im trying to cryogenicly freeze my pet frog. I want to float him on a magnet, and have a zombie ghostie frog.-Technically you cant because you reach an asymptote, but I imagine if you managed
A 41.3 kg wagon is towed up a hill inclined
at 19.6 deg with respect to the horizontal. The
tow rope is parallel to the incline and exerts
a force of 150 N on the wagon. Assume that
the wagon starts f
Here are two sample problems that I dont know how to answer. Itd be nice to explain it method by method. Most understandable explanation gets awarded.
Problems:
1. Fishing boat:
6m/s due North = wind
Imagine a point charge with charge of e between two plates. The plate above(L) is +100V and the plate below(K) is 0V. What is the electric potential energy of the charged particle if it is moved from
Heres the problem:
In a series circuit, if the potential difference across the battery is 20 V and the potential difference across R1 is 12 V, what is the potential difference across R2?
I know tha
Im not a believer of god...
so is it wrong for me to say physics is god? No body as seen god its a belief, but yet on the other hand we can see what Quantum Physics and all science as given us, bit of
Assume an electron with charge -e follows a circular orbit around a nucleus with charge Ze, where Z is the number of protons. The distance at which the electron orbits is r = a(0)/Z. Write an expressi
Im out of town and havent been in class at all for this unit. Ive been trying to read online resources to help me do my homework thats due online tonight, but Im not completely clear. Please explain i
Thank you everyone is advance. I appreciate your help in understanding this : )
An 8.0 ohm resistor and a 5.0 ohm resistor are connected in series with a battery. The potential difference across the
ok, so ive been reading about coulombs, joules, volts, electric potential and all that buisness in my physics textbook, and i have a question if im understanding it correctly, i read that a baloon can
Heres the problem:
In the series circuit (theres a pic that I obviously cant draw), if the current through R1 is 1.5 A, what is the current through R2?
I have the equation I=V/R, but I dont think th
