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Physics · Class 11
Upthrust is the net upward force exerted by a fluid on an immersed body. Archimedes' principle states that this force equals the weight of the displaced fluid: Fb = ρf gV_d.
PracticeThe first law of thermodynamics applies conservation of energy to a system: heat supplied equals the increase in internal energy plus work done by the system.
PracticeA reversible process can be retraced through the same states while restoring both system and surroundings; an irreversible process cannot be exactly undone without leaving a net change in the surroundings.
PracticeAccuracy describes how closely a measured value agrees with the true or accepted reference value.
PracticePhysics is the branch of natural science that studies matter, energy, motion, forces, space, time and their interactions.
Practice