15 ! will mark brainliest if newton’s first law of motion tells us that an object will move unless acted on by an unbalanced force. a) in a circle b) in a straight line c) with constant acceleration d) with deceleration until it comes to a stop

B) in a straight line

Explanation:

According to the newton first law that states that the objects at rest will remain the same until and unless they are set in motion by some other object or any other external force acting on them that can change its motion. Thus do not move without the creation of an unbalanced force, the object will move in the same direction with the same speed and thus will flow in the same line.

The radiation of the fire causes the saucepan to heat up. the conduction of the saucepan then to distribute the heat over the saucepan and to give heat to the water. the convection of the water distributing the heat within the water, till all the water is boiling