Perhaps most intriguingly, INDEC's and PriceStats' inflation rates accelerate and decelerate in tandem.

ECONOMIST: Argentina��s inflation problem

Esa believes double layer drives could be as small and economical as the one on board Smart 1, but much more powerful, which would enable craft to accelerate and decelerate faster.

BBC: Glow from argon plasma. Image: LPTP, Ecole Polytechnique

Larger mass and heavier weight require more energy to accelerate, and more energy to decelerate.

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