When the thermometer was in the 40°C water, in the time interval between 0 sec and 2 sec, approximately how rapidly, in °C/sec, was the temperature registered by the thermometer changing?
Correct answer: B. 5°C/sec.
- A. 1°C/sec.
- B. 5°C/sec.
- C. 10°C/sec.
- D. 40°C/sec.
Explanation
To answer this question, look at Figure 1. Between 0 and 2 seconds, the thermometer in the 40° water registered a temperature increase from 20° to 30°. Therefore, during the 2-second interval the temperature increased 10°, and the increase in temperature per second was 5°.
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