Question

which would increase the speed of a sound wave?
a wave passes from a solid to a liquid while remaining the same temperature.
the medium increases in temperature while remaining in the same phase.
the medium decreases in temperature while remaining in the same phase.
a wave passes from a liquid to a gas while remaining the same temperature.

Explanation:

To determine which option increases sound wave speed, recall: Sound speed depends on medium (solids > liquids > gases) and temperature (higher temp in same phase increases speed as particles move faster, aiding wave propagation).

• Option 1: Solid to liquid (lower speed medium) → decreases speed.
• Option 2: Medium temperature increases (same phase) → particles vibrate faster, so sound speed increases.
• Option 3: Decreasing temperature (same phase) → particles move slower, speed decreases.
• Option 4: Liquid to gas (lower speed medium) → decreases speed.

Thus, the correct option is the one with temperature increase in the same phase.

Answer:

The medium increases in temperature while remaining in the same phase.