Why is clicking a pen an example of mechanical energy?

The spring of a retractable pen stores the energy we provide through our clicks and puts a constant upward load on the refill.

Mechanical energy is the energy that is possessed by an object due to its motion or due to its position.

mechanical energy is often defined as the ability to do work, which means , its mechanical energy enables that object to apply a force to another object in order to cause it to be displaced.

Spherical shaped cell might increase the surface area and decrease the volume.

The answer to this will be from your lab notes/procedure. it would be best to ask another student who participated in the lab as we do not know what was done, what enzyme or if the temperature is celsius or fahrenheit. if i were to guess though i'd say the rate stopped due to enzyme denturing at high temperature