Question

heating materials a and b
(chart: temperature (°c) vs time (mins) with two lines for material a and b)

1. if we add thermal energy to materials a and b, which will heat up faster?

a) material a
b) material b
c) neither material a or b

1. material a has a ______ thermal mass than material b. chose the correct answer.

a) higher
b) lower

Explanation:

Step1: Analyze Heating Rate from Graph

To determine which material heats up faster, we compare the slopes of the heating (increasing temperature) segments of their graphs. A steeper slope means a faster temperature increase over time (since temperature is on the y - axis and time on the x - axis). Looking at the graph, Material B (blue line) has a steeper slope during the heating phase (from time 0 to when it reaches its peak temperature) compared to Material A (red line). This means that for the same amount of time, Material B's temperature increases more, so it heats up faster.

Step2: Evaluate the Options

• Option a: Material A - The graph shows Material A has a less steep slope, so it does not heat up faster.
• Option b: Material B - As analyzed from the graph's slope, Material B has a steeper slope, so it heats up faster.
• Option c: Neither - Since one of the materials (Material B) heats up faster, this option is incorrect.

Answer:

b) Material B