Two resistors R1 and R2 are connected in series and parallel. The values of the resistances are:
R1 = 100.0 +_ 0.1 Ω
R2 = 50.0 +_ 0.03 Ω
1. Calculate the uncertainty in the combined resistance for both the series and the parallel arrangements.

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Asolid cylinder and a cylindrical shell have the same mass, same radius, and turn on frictionless, horizontal axles. the cylindrical shell has light-weight spokes connecting the shell to the axle. a rope is wrapped around each cylinder and tied to blocks of equal masses that are held the same height above the ground. both blocks are released simultaneously. the ropes do not slip. which block hits the ground first? or is it a tie?

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