You come across a mysterious pond of an unknown liquid during your normal work day (lucky you). being curious, you submerge an upright large stick into the liquid. you note that 1.5 m of the stick is submerged. although you are holding the stick out 21 cm in front of you, the bottom of the stick appears 31 cm away. what is the mysterious liquid’s index of refraction?

1. D: the ability to cause a change or do work

The others dont make sense for energy.

2. C: Lamp

A lamp uses the electric current to light up a room, or area.

3. B: foil will bend away

The same charges repel each other that is why a magnet is repelled by the same pole of another magnet.

4. A: Sound

You can’t hear light or any of the other options.

5. A: gravity

Gravity is a force of nature that pulls on everything.

6. C: static electricity

The opposite charges stick to each other, a battery again is an example of this.

7. B: a copper nail

Metal is one of the best electric conductors.

8. C: closed circuit

This is because if a circuit is closed the electricity flows through perfectly but for example an open one would not work or it would leak energy.

Hope this helps