Question

what is fluid ? and buoyant force ?.... and arthopoda?????........

Answer 1

A substance that has no fixed shape and yields easily to external pressure is called fluid.

The name of upward force exerted on objects submerged in liquids is called buoyant force.

An arthropod is an invertebrate animal having an exoskeleton, a segmented body and paired joined appendages.

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Answer 2

HEY

HERE IS UR ANSWER ........

1) FLUID => Liquids and gases are more similar to each other because,                             unlike solids, they both conform to the shape of their container.                       They also both flow when moved around, and any material that                       flows is called a fluid. When you put air in your car tires, they                           stay inflated because the gas particles fill the entire space                               inside. Likewise, when you fill your bathtub, you can't keep the                       water on just one side because it flows to cover all the space of                       the tub.


2) BUOYANT FORCE => We often observe that our body feels lighter while                                             taking a swim in the pool. Also, when drawing                                                   water from a well, the bucket feels lighter till it is                                               partially or fully immersed in water. This is due to                                             the buoyant force acting on it. Buoyancy is defined                                           as an upward force exerted by a fluid that opposes                                           the weight of an object immersed in a fluid. As we                                             know that, the pressure in a fluid column increases                                           with depth. Thus, the pressure at the bottom of an                                           object submerged in the fluid is greater than that at                                           the top. The difference in this pressure results in a                                           net upward force on the object which we define as                                           buoyancy.   


3)ARTHROPOD => A large phylum of invertebrate animals that includes                                        insects, spiders, crustaceans, and their relatives. They                                    have a segmented body, an external skeleton, and                                          jointed limbs, and are sometimes placed in different                                          phyla. Arthropoda, the largest phylum in the animal                                          kingdom, which includes such familiar forms as lobsters,                                 crabs, spiders, mites, insects, centipedes,and millipedes.                                 About 84 percent of all known species of animals are                                       members of this phylum. Arthropods are represented in                                   every habitat on Earth and show a great variety of                                           adaptations. Several types live in aquatic environments,                                   and others reside in terrestrial ones; some groups are                                     even adapted for flight.

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