Question

if the quantity of parts per million were expressed as time, what would it be? 1 minute every hour 1 second every 11 days

Explanation:

Step1: Define parts per million

Parts per million (ppm) is $\frac{1}{1,000,000}$.

Step2: Calculate 1 minute per hour ratio

1 hour = 60 minutes. Ratio: $\frac{1}{60} \approx 0.0167 = 16,700$ ppm.

Step3: Calculate 1 sec per 11 days ratio

11 days = $11 \times 24 \times 60 \times 60 = 950,400$ seconds. Ratio: $\frac{1}{950,400} \approx \frac{1}{1,000,000} = 1$ ppm.

Step4: Match to ppm

The 1 sec/11 days ratio matches 1 ppm.

Answer:

B. 1 second every 11 days