Which one of the following is an example of mechanical potential energy?
Activated neuron
Polarized cell membrane
Stretched tendon
Relaxed muscle
The question asks for an example of mechanical potential energy. Mechanical potential energy is the energy stored in an object due to its position or state that has the potential to do work.
Let's evaluate each option:
| Option | Evaluation |
|---|---|
| Activated neuron | Involves electrical activity, not mechanical potential energy. |
| Polarized cell membrane | Relates to electrical potential across the membrane, not mechanical. |
| Stretched tendon | The stretch stores mechanical potential energy, as it involves deformation and has the potential to do work upon release. |
| Relaxed muscle | Does not store mechanical energy, as it is in a relaxed state. |
Based on this evaluation, the correct answer is: Stretched tendon, as it is a classic example of mechanical potential energy, storing energy when deformed.
An ornamental shrub species was brought from Japan in the early 1800s to India, where it was planted frequently in gardens and parks. The species persisted for many decades without spreading, and then began to spread invasively fifty years ago. Which one or more of the following processes could have led to it becoming invasive?
Which one or more of the following is/are greenhouse gas(es)?