Answer:
20 pig callers
Explanation:
Given that:
A pig caller produced intensity level of a sound = 107 dB
To find how many pig callers required to generate an intensity level of 120 dB;
we have:
120 dB - 107 dB = 13 dB
Taking the logarithm function;

where;
= initial intensity


I = 19.95
I ≅ 20 pig callers
As we know that :

Power, is in Meter. So divide focal length by 100

Answer:
the Answer Would be D
Explanation:
From what I know light travels 300,000 km/second , travels at fast speeds and travels in a straight line
Answer:
oxygen combines with small molecules. energy is released and it happens in the cytoplasm
Explanation:
Average speed = (total distance covered) / (total time to cover the distance) .
Total distance = (80 + 50 + 40) = 170 km
Total time = (1 + 0.5 + 0.5) = 2 hours
Average speed = (170 km) / (2 hrs) = 85 km/hr .