In a house the temperature at the surface of a window is 28.9 °c. the temperature outside at the window surface is 7.89 °c. heat is lost through the window via conduction, and the heat lost per second has a certain value. the temperature outside begins to fall, while the conditions inside the house remain the same. as a result, the heat lost per second increases. what is the temperature in degrees celsius at the outside window surface when the heat lost per second doubles?

-13.18°C

Explanation:

To develop the problem it is necessary to consider the concepts related to the thermal conduction rate.

Its definition is given by the function

Where,

Q = The amount of heat transferred

t = time

k = Thermal conductivity constant

A = Cross-sectional area

The difference in temperature between one side of the material and the other

d= thickness of the material

The problem says that there is a loss of heat twice that of the initial state, that is

Replacing,

Solvinf for ,

Therefore the temprature at the outside windows furface when the heat lost per second doubles is  -13.18°C

compass can be used day and night, cloudy or sunny

i had this question and the answer was 3.15 miles.

martina travels from school to her mom's office. from there, she walks to school. after school, she walks to the library and then to a friends house before finally ending back at home. find martina's total distance traveled.

a) 0 miles  

b) 0.4 miles  

c) 1 mile  

d) 3.15 miles