Question

3
how does the temperature at point a (shown above) change during the demonstration?
a it gradually decreases
b it gradually increases
c it suddenly increases
d it suddenly decreases

Explanation:

The image shows a hand pressing down on a partition between two colored liquids (likely a demonstration of heat transfer via conduction). Point A is on the red side, which typically represents a warmer area. When pressure is applied (or as the demonstration proceeds), heat would conduct gradually from the warmer region, leading to a gradual temperature change at Point A. Since the red side is warmer, the temperature at Point A would gradually decrease as heat transfers to the cooler blue side.

Answer:

A. It gradually decreases