Answer:
a)
, b) 
Explanation:
a) The Coefficient of Performance of the Carnot Heat Pump is:

After some algebraic handling, the temperature of the cold reservoir is determined:




b) The heating load provided by the heat pump is:



Answer:
Viscosity is notated using the common classification “XW-XX”. The number preceding the “W” (winter) rates the oil's flow (viscosity) at zero degrees Fahrenheit (-17.8 degrees Celsius). The lower the number, the less the oil thickens in cold weather.
That is too hard but u got that cuz i believe in you!!!
Uhmmmmm, a kitten...? Lol
Answer:
The trunks were all cut at the same lenght, 9 Carolingian feet, easier to carry away and to build. The construction was built by a team of four people, using traditional tools such as a hand saw, clamp, gimlet, Catalan type axe, wood hammer, chisel, two-handed wood saw, heavy wood hammer and metal wedges.
Explanation: