A) Will the buoyant force on an aluminum sphere submerged in water increase, decrease, or remain...
A) Will the buoyant force on an aluminum sphere submerged in water increase, decrease, or remain the same, if the temperature is increased from 20oC to 40oC? Explain.
B) Consider two days when the air temperature is the same but the humidity is different. Which is more dense, the dry air or the humid air at the same T?
Homework Answers
a) The water is becoming less dense and the sphere is expanding as temperature increases, the buoyant force is dependent on the density of the fluid, and the volume of water displaced - thus, if density decreases and volume increases. Thus, the increasing volume increases it's buoyancy.
b) Dry air is denser compared to water vapor and hence dry air will be denser as compared to humid air at the same temperature and pressure.
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