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1) If the current in a wire is at 0.5 A and the voltage is measured at 100 volts, what is the resistance in the wire?
2)What is the electric power used by an appliance if the current is 2 A and the voltage is 50 volts?
3)How are sound waves produced, and what impacts do different types of matter have on the speed of the wave?
4)What is the electromagnetic spectrum? Explain and give an example.
5)http://img254.imageshack.us/img254/6528/459431120201182932am187.png
In the figure shown, how could you determine the wavelength?
6)Explain how you can quickly determine whether a string of lights is wired in series or in parallel.
 one year ago
 one year ago
*reward: 1 medal for answers* 1) If the current in a wire is at 0.5 A and the voltage is measured at 100 volts, what is the resistance in the wire? 2)What is the electric power used by an appliance if the current is 2 A and the voltage is 50 volts? 3)How are sound waves produced, and what impacts do different types of matter have on the speed of the wave? 4)What is the electromagnetic spectrum? Explain and give an example. 5)http://img254.imageshack.us/img254/6528/459431120201182932am187.png In the figure shown, how could you determine the wavelength? 6)Explain how you can quickly determine whether a string of lights is wired in series or in parallel.
 one year ago
 one year ago

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zeig_101Best ResponseYou've already chosen the best response.0
See, I dont know how to use Ohm's law
 one year ago

inkyvoydBest ResponseYou've already chosen the best response.2
For number one, I=0.5 and V=100
 one year ago

inkyvoydBest ResponseYou've already chosen the best response.2
so you just back substitute the numbers in: (0.5)=100/R Next you isolate R. 0.5R=100 R=200
 one year ago

inkyvoydBest ResponseYou've already chosen the best response.2
It's not a variable. If it helps you, use Amps instead of A
 one year ago

zeig_101Best ResponseYou've already chosen the best response.0
Ok, I don't get this can you walk me through it?
 one year ago

inkyvoydBest ResponseYou've already chosen the best response.2
Okay. We know that I=V/R. We also know that I=0.5Amps and V=100Volts Do you follow?
 one year ago

zeig_101Best ResponseYou've already chosen the best response.0
What do the things in I=V/r mean?
 one year ago

inkyvoydBest ResponseYou've already chosen the best response.2
It's a relationship between current, voltage, and resistance. I is a variable that represents current. V is a variable that represents voltage. R is a variable that represents resistance. We usually give these measurements in Amperes (A), Volts (V) and Ohms (omega), respectively.
 one year ago

zeig_101Best ResponseYou've already chosen the best response.0
ok, so its really C=V/R?
 one year ago

inkyvoydBest ResponseYou've already chosen the best response.2
We don't use C for current. We use I. This is out of habit, so use I okay?
 one year ago

inkyvoydBest ResponseYou've already chosen the best response.2
(In mathematics we often encounter constants and we represent them with C's. If we used C for current it would be confused with other values and would not be clear). BUt essentially yes, the relationship is I=V/R
 one year ago

zeig_101Best ResponseYou've already chosen the best response.0
now where do i go from there?
 one year ago

inkyvoydBest ResponseYou've already chosen the best response.2
Multiply both sides by R.
 one year ago

zeig_101Best ResponseYou've already chosen the best response.0
What is the electric power used by an appliance if the current is 2 A and the voltage is 50 volts? I=V/r 2=50/r 2r=50 r=100?
 one year ago

inkyvoydBest ResponseYou've already chosen the best response.2
btw, the units for the resistance are in ohms.
 one year ago

inkyvoydBest ResponseYou've already chosen the best response.2
no, power is P=IV x.x
 one year ago

inkyvoydBest ResponseYou've already chosen the best response.2
sorry they are different formulas.
 one year ago

zeig_101Best ResponseYou've already chosen the best response.0
What is the electric power used by an appliance if the current is 2 A and the voltage is 50 volts? P=I*V? P=2A*50V P=100?
 one year ago

inkyvoydBest ResponseYou've already chosen the best response.2
Do you need help with the rest?
 one year ago
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