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A 0.20 kg aluminum cup (ca = 900 J/kg°C) at 20°C is filled with 0.10 kg of hot water (cw = 4186 J/kg°C) at 80°C. What is the final equilibrium temperature (Tf)?
Find the rate of energy of absorbed radiation from a person of surface area (1.5 m²) with surface temperature (32°C) in a (20°C) room.
e=0.97
A 5 kg iron block (density 7870 kg/m³) is completely submerged in water. The buoyant force acting on it is approximately:
According to Archimedes’ Principle, the weight of the displaced fluid is equal to:
How much sweat must be vaporized to reduce the temperature of a (23 kg) child by (4 K)?
A) 132.8 g
B) 86.6 g
C) 151.6 g
D) 98.7 g
Estimate the heart power if blood is pumped to an aorta with a cross-sectional area (3 cm²) at an average speed (23 cm/s) and pressure (120 mmHg):
