Ahigh-resistance material is used as an insulator between the conductors of a length of coaxial cable. the resistance material, which forms a hollow tube, has an inner radius a and an outer radius b, and the insulator provides a resistance r between the conductors. if a second insulator, made of the same material and having the same length, is made with double both the inner radius and the outer radius of the first, what resistance would it provide between the conductors?

(a) (ln 2)r
(b) 4r
(c) r/(ln 2)
(d) 2r
(e) r

Which notation is used to represent an alpha particle? a. b. c. d.

Determine the age of a fossil if it had only one eighth of its original carbon-14 content remaining?

Click the game tab at the bottom of the simulation and select level 1. (there is no seesaw balance for this part of the activity.) balance the first equation, and click check to see if you got it right. if you can’t balance it in the first try, you can try again. work through the five equations for level 1. click continue to go on to level 2, and later level 3. each level is more difficult than the one before. keep trying until all the equations are balanced. in one or two sentences, describe how you did in the balancing game. in a few more sentences, explain one strategy you learned for balancing more complex equations.