When boiling water in a kettle, the top may move slightly if it is not tight. What evidence explains why this happens?

Since the water is boiling, and a lid is on there is a major amount of thermal energy just waiting to go somewhere, not to mention it takes the form of steam which much escape somehow, likely causing a very faint movement on the top of the kettle.

Explanation:

explanation:

the universal gravitation equation. since the gravitational force is directly proportional to the mass of both interacting objects, more massive objects will attract each other with a greater gravitational force. if the mass of one of the objects is doubled, then the force of gravity between them is doubled.

enzyme active site and substrate specificity

enzymes bind with chemical reactants called substrates. there may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. in some reactions, a single-reactant substrate is broken down into multiple products