He takes long weekends every time the weather starts heating up.
She had biscuits in the oven and was heating up a pan to fry some eggs when Alex walked in.
20 minutes for filling and washing out after emptying; 60 minutes for heating up and subsiding; and 40 minutes for drawing off the defecated juice, without agitating it.
Thus the necessary slowness of the heating up of the molten charge would compel us to make the removal of the carbon slow, even if this slowness were not already forced on us by the danger of having the charge froth so much as to run out of the furnace.
The fact that tidal forces are heating up part of the moon Enceladus was remarkable enough.