According to archimedes' principle, what condition has to be met for an object to float?
1.buoyant force has to be less than the weight of the object
2.buoyant force has to equal the weight of the object
3.buoyant force has to be greater than the weight of the object
4.buoyant force has to equal exactly half the weight of the object

Option C, buoyant force has to be greater than the weight of the object

Explanation:

As per Archimedes' Principle, buoyant force is the force exerted by water and it acts in the upward direction and is equal to the weight water displaced by the object immersed in water. Hence, there arises three situations -  

a)When both the buoyant force and weight of the displaced liquid is equal, the object remains in stable condition and thus it remains submerged.

b)When weight of water displaced by the immersed object becomes greater than the buoyancy force exerted by water, the object sinks down.  

c)When weight of water displaced by the immersed object becomes less than the buoyancy force exerted by water, the object rise up and floats.

Hence , Option C is correct.

relative dating involves things like higher layers are most recent than rocks lower in the sequence. this can be extended to the known sequence of fossils. rocks containing rabbit fossils are later than those containing dinosaur fossils.  

absolute dating methods mainly use radioactive elements that have known rates of decay and produce recognizable products. for example potassium 40 decays to produce argon. once a rock has solidified the argon is trapped. by measuring the argon and potassium0 you can get an accurate number for the age.  

some other methods are good for archaeological ages. dendrochronology involves recognizing the sequence of tree rings. the orientation of magnetized particles in baked clay can be used to date a fire.

hope this .. .

[ answer ]

foliated

[ explanation ]

foliation forms in a rock when pressure squeezes the rock together. the rock then has a design of many different color little lines. there are three types of foliated rock. the types are slate, schist, and gneiss. each type of foliated rock is different based on grain size and foliation characteristics. the lines appear when the rock has been under pressure.

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