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Science · Drill 43

Science practice 43

11 questions ~9 min recommended
⏱ 00:00
Score
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3.5 3 2.5 - E 2- Combined Voltage of 2AA Batteries Used in Incandescent Bulb Flashlight1 • Brand K heavy duty • Brand P heavy duty A Brand E alkaline * Brand D alkaline 1- 0.5 - 4 5 Time (h) 8 9 10

Device Incandescent bulb flashlight2 LED bulb flashlight Remote-control toy car Plug-and-play video game Time Two AA Alkaline Batteries Exceeded 2.2 V (hours) Brand D Brand D Brand D Brand E Brand E Brand E Trial 1 Trial 2 Trial 3 Trial 1 Trial 2 Trial 3 7.00 6.75 6.75 6.75 6.50 6.50 24.25 2.00 11.50 25.50 8.50 12.50 24.00 6.50 13.50 23.75 14.25 13.50 25.75 4.50 12.25 24.75 8.50 13.25

3

Many companies advertise that their brand of battery outlasts the competitors' batteries. A series of experiments were conducted to compare batteries from different manufacturers. Figure 12.3 shows the results of tests of four different brands of batteries. Two AA batteries were tested in an incandescent bulb flashlight, and the combined voltage was tested for continuous use over time. The flashlight operated effectively for voltage values greater than 2.2 V.

Figure 12.3

Table 12.2 compares how Brands D and E alkaline batteries performed in different devices. The table displays the time the combined voltage of two batteries remained above 2.2 V. The voltages were checked every quarter-hour.

TABLE 12.2

1. According to Figure 12.3, how did the performance of Brands D and E alkaline batteries compare?

2. According to Figure 12.3, the Brand P battery was capable of operating the incandescent flashlight for approximately:

3. Which of the following conclusions is plausible from the information provided in Figure 12.3?

4. What can one conclude about the performance of Brands D and E batteries when they were used in the remote-control car?

5. When used in the incandescent bulb flashlight, how much time did Brand K's heavy-duty battery sustain a voltage between 2 and 3 V?

6. Using the data in Table 12.2, how do the averages of the three trials compare when Brands D and E are used in the plug-and-play video game?

7. Which of the following statements is true according to Figure 12.3?

8. Which of the following steps in the experimental procedure is MOST IMPORTANT in the comparison of battery performance between brands?

9. Which of the following devices is most likely classified as a low-drain device?

10. Approximately how much longer than the incandescent bulb flashlight does the LED bulb flashlight last?

11. In terms of just the Brand E tests, which of the following devices is most likely classified as a high-drain device?

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