(a) Calculate the rate at which body heat is conducted through the clothing of a skier in a steady-state process, given the following data: the body surface area is 1.8 m 2 , and the clothing is 1.0 cm thick; the skin surface temperature is 33°C and the outer surface of the clothing is at 1.0°C; the thermal conductivity of the clothing is 0.040 W/m · K. (b) If, after a fall, the skiers clothes became soaked with water of thermal conductivity 0.60 W/m · K, by how much is the rate of conduction multiplied?
(a) Calculate the rate at which body heat is conducted through the clothing of a skier in a steady-state process, given the following data: the body surface area is 1.8 m 2 , and the clothing is 1.0 cm thick; the skin surface temperature is 33°C and the outer surface of the clothing is at 1.0°C; the thermal conductivity of the clothing is 0.040 W/m · K. (b) If, after a fall, the skiers clothes became soaked with water of thermal conductivity 0.60 W/m · K, by how much is the rate of conduction multiplied?
(a) Calculate the rate at which body heat is conducted through the clothing of a skier in a steady-state process, given the following data: the body surface area is 1.8 m2, and the clothing is 1.0 cm thick; the skin surface temperature is 33°C and the outer surface of the clothing is at 1.0°C; the thermal conductivity of the clothing is 0.040 W/m · K. (b) If, after a fall, the skiers clothes became soaked with water of thermal conductivity 0.60 W/m · K, by how much is the rate of conduction multiplied?
17. Two charges, one of charge +2.5 × 10-5 C and the other of charge +3.7 × 10-6 C, are 25.0 cm apart.
The +2.5 × 10−5 C charge is to the left of the +3.7 × 10−6 C charge.
a. Draw a diagram showing the point charges and label a point Y that is 20.0 cm to the left of the
+3.7 × 10-6 C charge, on the line connecting the charges. (Field lines do not need to be drawn.)
b. Calculate the net electric field at point Y.
3
Set
ба
||Axl
49.32
6b
71
Ay
22
Magnitude of A
Angle of A
24.04
Angle of -A
22
54
155.96
° (pos Ax) 204.04
° (neg Ax) 335.96
°
(pos Ax)
° (neg Ax)
115.77
° (pos Ax) 295.77
° (pos Ax)
-39
81
208.78
° (neg Ax) 28.78
°
(neg Ax)
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