Daca stam intr-o barca usoara si tragem de o sfoara legata de un vapor ,ne vom apropia de un vapor .de ce nu se apropie vaporul de banca?

Could someone . i have tried to solve myself but my calculation is off

Which type of basaltic lava flow has a fairly smooth

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?