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.
Eight students (P, Q, R, S, T, U, V, and W) are playing musical chairs. The figure indicates their order of position at the start of the game. They play the game by moving forward in a circle in the clockwise direction.
After the 1st round, the 4th student behind P leaves the game.
After the 2nd round, the 5th student behind Q leaves the game.
After the 3rd round, the 3rd student behind V leaves the game.
After the 4th round, the 4th student behind U leaves the game.
Who all are left in the game after the 4th round?

Here are two analogous groups, Group-I and Group-II, that list words in their decreasing order of intensity. Identify the missing word in Group-II.
Abuse \( \rightarrow \) Insult \( \rightarrow \) Ridicule
__________ \( \rightarrow \) Praise \( \rightarrow \) Appreciate
The 12 musical notes are given as \( C, C^\#, D, D^\#, E, F, F^\#, G, G^\#, A, A^\#, B \). Frequency of each note is \( \sqrt[12]{2} \) times the frequency of the previous note. If the frequency of the note C is 130.8 Hz, then the ratio of frequencies of notes F# and C is: