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Nadya [2.5K]
3 years ago
6

Students in Ms. Delgado’s science class built machines. They measured the input and output forces. The results of four students

are listed in the table.
Which lists the students in order from student whose machine has the least mechanical advantage to student whose machine has the greatest mechanical advantage?
Physics
2 answers:
puteri [66]3 years ago
7 0

Answer:D. Lian, Aida, Dipak, Brian

<h3>welcome</h3>

Explanation:

nordsb [41]3 years ago
4 0

The correct answer is

D. Lian, Aida, Dipak, Brian

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Three noise sources produce volume (loudness) levels of 70, 73, and 80 dB when acting separately. When the sources act together,
Mashutka [201]

Sound at 70 dB is 70 dB louder than the human reference level.  That's 10⁷ times as much as the reference sound power.

Sound at 73 dB is 73 dB louder than the human reference level.  That's 10⁷.³  or  2 x 10⁷  times as much as the reference sound power.

Sound at 80 dB is 80 dB louder than the human reference level.  That's 10⁸  or 10 x 10⁷ times as much as the reference sound power.

Now we can adumup:

Intensity of all 3 sources = (10⁷) + (2 x 10⁷) + (10 x 10⁷)

Intensity = (13 x 10⁷) times the sound power reference intensity.

Intensity in dB = 10 log (13 x 10⁷) = 10 (7 + log(13)

Intensity = 70 + 10 log(13)

Intensity = 70 + 10 (1.114)

Intensity = 70 + 11.14

Intensity = <em>81.14 dB</em>

<em>______________________________________</em>

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