Author Question: By how many decibels does the intensity level of a sound increase when you triple the intensity of a ... (Read 71 times)

Zoey63294 · **on:** Jul 29, 2018

By how many decibels does the intensity level of a sound increase when you triple the intensity of a source of sound?

A) 12 dB B) 3.0 dB C) 4.8 dB D) 6.0 dB E) 9.5 dB

Question 2

A shear force of 400 N is applied to one face of an aluminum cube having sides of 30 cm each. What is the resulting displacement of this face of the cube if the opposite face is held fixed? The shear modulus for aluminum is 2.5 1010 N/m2.

A) 8.2 10-8 m B) 1.9 10-8 m C) 4.4 10-8 m D) 5.3 10-8 m