The Current, I Ampere flowing through wire is inversely proportional to resistance, R Ohms. Given that current of 12 Ampere has resistance of 0.5 Ohms, find: i-The resistance when current is 3 Amperes.
ii-Relation between current and resistance
iii-The current when resistance is 3 Ohms.​​

Carbon is allowed to diffuse through a steel plate 15 mm thick. the concentrations of carbon at the two faces are 0.65 and 0.30 kg c/m^3 fe, which are maintained constant. if the preexponential and activation energy are 6.2 x 10-7 m2 /s and 80,000 j/mol, respectively, compute the temperature at which the diffusion flux is 1.43 x 10^-9 kg/m^2 -s.

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?

Lightning is an example of what phenomenon? a release of a large amount of energy an absorption of a large amount of energy a natural electric circuit a natural electric current