Textbook Question
Calculate the true mass (in vacuum) of an aluminum sphere whose apparent mass is 4.0000 kg when weighed in air.
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19. Fluid Mechanics
Buoyancy & Buoyant Force
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Which principle explains why certain insects can walk on water?
A
Surface tension
B
Bernoulli's principle
C
Archimedes' principle
D
Pascal's principle
Verified step by step guidance1
Identify the phenomenon being described: insects walking on water.
Understand that this phenomenon involves the interaction between the insect and the surface of the water.
Recognize that the key concept here is the ability of the water surface to support the weight of the insect without breaking.
Recall that surface tension is the property of the liquid surface that allows it to resist an external force, due to the cohesive nature of its molecules.
Conclude that surface tension is the principle that explains why certain insects can walk on water, as it allows the water surface to support the insect's weight.
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