| 11. | High fluid pressure provides a buoyancy force upwards on the glacier, reducing the friction at its base.
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| 12. | This provides a buoyancy force, " lifting " the glacier from the bed and reducing the friction force.
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| 13. | Buoyancy force is based on the basic principle of pressure variation with depth, since pressure increases with depth.
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| 14. | Marine birds also tend to have higher than expected body mass as a mechanism to counteract buoyancy forces when submerged.
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| 15. | From the Archimedes buoyancy principle, the buoyancy force acting on the hydrometer is equal to the weight of liquid displaced.
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| 16. | Hence buoyancy force arises as pressure on the bottom surface of the immersed object is greater than that at the top.
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| 17. | The injected bubbles / droplets are typically of a lower density than the coolant and thus experience an upward buoyancy force.
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| 18. | The subducting slab undergoes backward sinking due to the negative buoyancy forces causing a retrogradation of the trench hinge along the surface.
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| 19. | The buoyancy force exerted on a body can now be calculated easily, since the internal pressure of the fluid is known.
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| 20. | While it remains submerged buoyancy forces cancel the weight of the trapped water and the weight of the tube is effectively zero.
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