170 students in a lecture hall can scream at 115 dB.
Thus, we should expect that:
A. an average student can do 0.68 dB by him or herself.
B.340 average students can do 125 dB.
C.340 average students can do 230 dB.
D.1700 average students can do 125 dB.
E.85 average students can do 105 dB.
F.the loudest student in the class can do 115 dB.
Wouldn't ten times the number of students be an increase of 10 db?
To answer this question, we need to analyze the given information and make some calculations.
The given information states that 170 students can scream at 115 dB in a lecture hall. From this, we can conclude that the combined sound intensity of the students' screams is equal to 115 dB.
To determine the sound intensity that can be produced by an individual student on average, we need to divide the combined sound intensity (115 dB) by the number of students (170), since each student contributes equally to the overall sound.
So, the average sound intensity per student would be:
115 dB / 170 = 0.6765 dB per student
Now, let's examine each option and see which one aligns with our calculations:
A. "An average student can do 0.68 dB by themself." This option matches our calculation, so it could be a possible answer.
B. "340 average students can do 125 dB." This option does not align with our calculation. It assumes that the sound intensity increases linearly with the number of students, which is not the case. So, this option is incorrect.
C. "340 average students can do 230 dB." This option is clearly incorrect as it suggests an enormous sound level that is not realistic.
D. "1700 average students can do 125 dB." This option assumes that the sound intensity increases linearly with the number of students, which, as mentioned earlier, is not accurate. Therefore, this option is incorrect.
E. "85 average students can do 105 dB." This option does not match our calculation, so it is incorrect.
F. "The loudest student in the class can do 115 dB." This option is incorrect because the given information states that the combined sound intensity of all the students is 115 dB, not the sound intensity of the loudest student.
Based on our calculations and analysis, the correct answer is:
A. An average student can do 0.68 dB by themself.