Search results

What is the emf of a battery with a 0.15 ? internal resistance if the battery delivers 1.5 A to an externally connected 5.0 ? resistor?

A copper wire has a 25m-? resistance at 20° C. When the wire is carrying a current, heat produced by the current causes the temperature of the wire to increase by 27° C. (a) What is the change in the wire's resistance? (b) If the original current was 10.0mA, what is its final current?

i have just bought 2 black moor fish, they have small white dots but i've only had them for about day. is there a problem with this or is it natural?