A resistor is constructed of a carbon rod that has a uniform cross-sectional area of 5.10 mm2. When a potential difference of 12.0 V is applied across the ends of the rod, the rod carries a current of 4.40 ✕ 10-3 A.(a)What is the resistance of the rod?
(b) What is the rod’s length?

Select all the correct answers. which three statements about electromagnetic radiation are true?

Acertain half-reaction has a standard reduction potential e_red^0 = -0.94 v. an engineer proposes using this half-reaction at the cathode of a galvanic cell that e must provide at least 1.00 v of electrical power. the cell will operate under standard conditions. a. is there a minimum standard reduction potential that the half-reaction used at the anode of this cell can have? b. is there a maximum standard reduction potential that the half-reaction used at the anode of this cell can have?

Newton's second law states that f = m x a (force is mass times acceleration). which example would have the greatest acceleration?