Explanation:
Buoyant force = weight of displaced fluid = (volume of body submerged) × density_fluid × g. Depends on volume displaced and g. Not density of body.
Explanation:
Pressure = Force/Area. Force = mass × acceleration, dimensions [MLT⁻²]. Area = L². So pressure = [MLT⁻²]/[L²] = [ML⁻¹T⁻²]. This is also the dimension of stress. Common exam trap: confuse with energy density which is also [ML⁻¹T⁻²].
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