Q: Does "act" have the same meaning in the following two sentences?

The breaks of my new car act quickly.

The dog acts ferocious, but he is really afraid of people.

A: different meanings

Q: Does "operation" have the same meaning in the following two sentences?

They paid taxes on every stage of the operation.

They had to consolidate their operations.

A: the same meaning

Q: Does "heat" have the same meaning in the following two sentences?

Heat the house.

Heat the water on the stove.

A:
different meanings