Author Question: How many decibels correspond to a sound intensity of 7.0 10-7 W/m2? A) 70 B) 58 C) 69 D) 75 ... (Read 147 times)

bobypop · **on:** Jul 27, 2018

How many decibels correspond to a sound intensity of 7.0 10-7 W/m2?

A) 70
B) 58
C) 69
D) 75
E) 63

Question 2

What is the rate of heat flow through a pane of glass that is 40.0 cm by 30.0 cm with a thickness of 4.00 mm when the outside temperature is -10.0C and the inside temperature is 25.0C?

The thermal conductivity of glass is 0.105 W/(mK) and the specific heat of glass is 0.180 cal/(gC).
A) 24.2 W
B) 3.81 W
C) 18.6 W
D) 47.3 W
E) 110 W