What is the series equivalent of two 1000 W resistors in series?

The equivalent resistance when two resistors are connected in series is

the sum of their individual resistances.

The marking on the resistor that says "1000 W" is the rating that tells

how much power the resistor can safely dissipate, without overheating

or exploding. (The 'W' stands for 'Watts'.) It doesn't tell us anything about

their individual resistances. So we don't have enough information to calculate

their series equivalent.