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Physics
Physics
Problem
A cup of coffee at
80
∘
C
80^{\circ}\text{C}
8
0
∘
C
cools to
65
∘
C
65^{\circ}\text{C}
6
5
∘
C
in
5
5
5
minutes in a room whose temperature is
20
∘
C
20^{\circ}\text{C}
2
0
∘
C
. Assuming the same conditions continue, determine the temperature of the coffee after a total of
15
15
15
minutes. a)
43.3
∘
C
43.3^{\circ}\text{C}
43.
3
∘
C
b)
52.4
∘
C
52.4^{\circ}\text{C}
52.
4
∘
C
c)
45.3
∘
C
45.3^{\circ}\text{C}
45.
3
∘
C
d)
35.0
∘
C
35.0^{\circ}\text{C}
35.
0
∘
C
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