According to newton's first law of motion, what is required to make an object slow down? enter your answer in the space provided.

According to newton's first law of motion, friction is required to make an object slow down.

Explanation:

According to the Newton's first law of motion, for an object to change its velocity (either a change in the magnitude or the direction), there must be a cause to it which is defined as a net external force.

For example, an object which is sliding across a table or floor slows down due to the net force of friction that is acting on that object.

if the thermos has a vacuum innner, then heat through conv currents and conduction are reduced = vacuum flask