WorksheetsApplications of logarithmic functions
Total questions: 13
Worksheet time: 39mins
A sound of 75dB is 50 times louder than a weaker sound. What is the loudness of the weaker sound?
60
58
10
64
Two different sounds has their loudness level as 80 and 100 dB. How much louder is the second sound?
2 times
25 times
50 times
100 times
When Mrs. Windsor is speaking, her voice has a decibel level of 55. When she gets excited it raises to 80 dB. How much more intense is her excited voice compared to her calm voice?
316
205
117
412
Early in the century an earthquake in San Francisco registered 8.3 on the Richter scale. In the same year, another earthquake was recorded in South America that was four times stronger. What was the magnitude of the earthquake in South America?
5.9
8.9
6.9
7.9
How much more intense is a magnitude 8.3 earthquake than a 7.1 earthquake?
15
16
17
18
What is the magnitude of an earthquake that is six times stronger than a 8.0 magnitude earthquake?
8.4
7.6
9.0
8.8
How much more intense is an earthquake measured 6.8 on the Richter scale than that of measured 4.3?
6.8^2.5
4.3^2.5
10^2.5
100
Given the concentration of Hydrogen ions is 0.001, find the pH value of the substance.
3
4
5
6
Find the concentration of Hydrogen ions of a substance with pH 2.
0.1
0.01
0.001
1
if the intensity of an earthquake is 200 times as great as Io , what is the magnitude of this earthquake?
3.2
4.3
2.3
4.5
A small tremor of magnitude 3.4 is followed by a strong one of 4.1. How much stronger is the second one?
3 times
4 times
5 times
6 times
A strong earthquake of magnitude 5.7 is 3 times more intense than a weaker one. What is the magnitude of the weaker earthquake?
5.02
4.97
3.3
6.12
Calculate the pH of the acid which has hydrogen concentration of 2.5 x 10 ^ -5.
4.6
4.4
4.7
4.9
