There are 3 questions on this one and they are not related. The brick wall (of thermal conductivity
0.82 W/m ·
◦ C) of a building has dimensions
of 2.9 m by 8 m and is 12 cm thick.
How much heat flows through the wall in
a 7.6 h period when the average inside and
outside temperatures are, respectively, 26◦C
and 3◦C?
Answer in units of MJ.

Three liquids are at temperatures of 5 ◦C,
21◦C, and 39◦C, respectively. Equal masses of
the first two liquids are mixed, and the equilibrium temperature is 16◦C. Equal masses of
the second and third are then mixed, and the
equilibrium temperature is 27.8
◦C.
Find the equilibrium temperature when
equal masses of the first and third are mixed.
Answer in units of ◦C.

A jar of tea is placed in sunlight until it
reaches an equilibrium temperature of 33.9
◦C .
In an attempt to cool the liquid, which has a
mass of 196 g , 123 g of ice at 0.0
◦C is added.
At the time at which the temperature of the
tea is 29.5
◦C , find the mass of the remaining
ice in the jar. The specific heat of water
is 4186 J/kg ·
◦ C . Assume the specific heat
capacity of the tea to be that of pure liquid
water.
Answer in units of g.

7848878748758674578488654746855648368767775437866858678356875867546754768547865465687545658565665465463276546467546785486756785765476858765853656732342875376545435323467346777777777777773784887874875867457848865474685564836876777543786685867835687586754675476854786546568754565856566546546327654646754678548675678576547685876585365673234287537654543532346734677777777777777378488787487586745784886547468556483687677754378668586783568758675467547685478654656875456585656654654632765464675467854867567857654768587658536567323428753765454353234673467777777777777737848878748758674578488654746855648368767775437866858678356875867546754768547865465687545658565665465463276546467546785486756785765476858765853656732342875376545435323467346777777777777773784887874875867457848865474685564836876777543786685867835687586754675476854786546568754565856566546546327654646754678548675678576547685876585365673234287537654543532346734677777777777777378488787487586745784886547468556483687677754378668586783568758675467547685478654656875456585656654654632765464675467854867567857654768587658536567323428753765454353234673467777777777777737848878748758674578488654746855648368767775437866858678356875867546754768547865465687545658565665465463276546467546785486756785765476858765853656732342875376545435323467346777777777777773784887874875867457848865474685564836876777543786685867835687586754675476854786546568754565856566546546327654646754678548675678576547685876585365673234287537654543532346734677777777777777378488787487586745784886547468556483687677754378668586783568758675467547685478654656875456585656654654632765464675467854867567857654768587658536567323428753765454353234673467777777777777737848878748758674578488654746855648368767775437866858678356875867546754768547865465687545658565665465463276546467546785486756785765476858765853656732342875376545435323467346777777777777773784887874875867457848865474685564836876777543786685867835687586754675476854786546568754565856566546546327654646754678548675678576547685876585365673234287537654543532346734677777777777777378488787487586745784886547468556483687677754378668586783568758675467547685478654656875456585656654654632765464675467854867567857654768587658536567323428753765454353234673467777777777777737848878748758674578488654746855648368767775437866858678356875867546754768547865465687545658565665465463276546467546785486756785765476858765853656732342875376545435323467346777777777777773784887874875867457848865474685564836876777543786685867835687586754675476854786546568754565856566546546327654646754678548675678576547685876585365673234287537654543532346734677777777777777378488787487586745784886547468556483687677754378668586783568758675467547685478654656875456585656654654632765464675467854867567857654768587658536567323428753765454353234673467777777777777737848878748758674578488654746855648368767775437866858678356875867546754768547865465687545658565665465463276546467546785486756785765476858765853656732342875376545435323467346777777777777773

answer: 2×10^-2kg

explanation: density= mass per volume

vol=mass/density

converting to s.i units we have;

3÷1000kg = 0.003

1.5÷100m = 0.15

0.003/0.15 = 0.02kg