Aflea walking along a ruler moves from the 45 cm mark to the 27 cm mark. it does this in 3 seconds. what is the speed? what is the velocity?
(define increasing numbers to be the positive direction and decreasing numbers to be the negative direction.)

(2) (a) you have a simple circuit that consists of only a battery (δvbat=1.5v) and two resistors with resistance r1=10ω and r2=5ω, connected in series with each other. what is the current running through the battery? (b) you re-arrange your circuit so now r2 is attached in parallel to r1 rather than in series. what is the current running through the battery? (c) you add an additional resistor r3=7ω on the same branch as r2. what is the current running through the battery? (d) what is the power dissipated in r3?