A 1500 kg car is approaching the hill at 14.0 m/s when it suddenly runs out of gas. What is the car's speed after coasting down the other side?

Two resistors r1 and r2 may be connected either in series or parallel across an ideal battery with emf ε. we desire the rate of energy dissipation of the parallel combination to be 8.75 times that of the series combination. if r1 = 105 ω, what are the (a) smaller and (b) larger of the two values of r2 that result in that dissipation rate?