(a) how strong is the attractive force between a glass rod with a 0.700 μc charge and a silk cloth with a –0.600 μc charge, which are 12.0 cm apart, using the approximation that they act like point charges? (b) discuss how the answer to this problem might be affected if the charges are distributed over some area and do not act like point charges.

(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?