How many btu per hour are lost through a 100-square foot wall that is made up of a 12-inch thick concrete block wall with an r value of 1.89 and 4 inches of fiberglass insulation with an r value of 14.8? the inside temperature is 65 degrees f and the outside temperature is 15 degrees f.

300 Btu per hour

Explanation:

given data

area = 100-square foot

thick = 12 inch

R value at 12 = 1.89

R value at 4 = 14.8

inside temperature = 65 degrees F

outside temperature = 15 degrees F

to find out

How many Btu per hour

solution

we get here How many Btu per hour that is express as

Btu per hour =   ............1

put here value we get

Btu per hour =

Btu per hour = 299.580

so Btu per hour is 300 Btu per hour

0.55x745.7j and a calculator

explanation:

considering the bohr theory, the type of connection that requires the transfer the answer conuldn't be right