Two cylindrical rods, one copper and the other iron, are identical in lengths and cross-sectional areas. they are joined, end to end, to form one long rod. a 12-v battery is connected across the free ends of the copper-iron rod. what is the voltage between the ends of the copper rod?

If the speed of a particle triples ,by what factor does its kinetic energy increase?

Which of these statements is true? a. quarks pair with leptons to form protons and neutrons. b. quarks pair with bosons to form photons. c. quarks pair with photons to form protons and neutrons. d. quarks pair with other quarks to form protons and neutrons. e. quarks pair with electrons to form protons.

Suppose you have a box. which of these is not necessarily a true statement regarding the relationship between the force applied to the box, the work done on the box, and the distance the box is moved? a. if the box is not moved, no force is being applied to the box. b. if no force is applied to the box, no work is done on the box. c. if work is done on the box, then a force is applied to the box. d. if work is done on the box, then the box is moved a distance.