ARCHIMEDES and EUREKA
Why do ships float on water when in fact they should sink? Why does paper float on water and a paperweight sink? Archimedes, the Greek inventor and mathematician, accidentally discovered 2200 years ago the answer to these questions.
People believe that King Heiro II (a friend of Archimedes) ordered a new crown of solid gold. For whatever reason, the king began to suspect the goldsmith forged the crown of adding silver to cut costs. The king asked Archimedes for help.
Archimedes went for one last thinking to see if he could resolve the problem once and for all. He went to the Syracuse public bath house (which were common in ancient times) with the  problem in his head while was having a bath. Archimedes filled the tub with water, and let his naked body slowly into water. He noticed water was spilling over the sides. In a flash, Archimedes realised the relation between the water that fell out and the weight of his body - in other words he discovered why some objects float and some sink! Archimedes was so excited with his discovery that he hopped out of the bath, and rushed naked into the street while he was yelling 'Eureka!' 'Eureka!' (Greek word for 'I have found it!).
Archimedes returned to his place, filled a bowl with water and placed it in a larger bowl. Then he gently let down the crown, and as expectedweight的几种形式, some water spilled out. Archimedes quickly measured the volume of displaced (=odmaknjena) water and calculated the density. When compared to the known density of an equal amount of gold, he noticed that the crown was less dense than the gold. This led him to believe that the goldsmith cheated the king.
Archimedes discovery, now popular as the Archimedes' principle, explains why steel ships, weighing thousands of tons, float. But what is Archimedes' principle? When a body is immersed in water, it experiences a force (the buoyancy force). This force is equal to the weight of the water displaced by the body.
For instance, a lump of steel will sink for it is unable to displace water that equals its weight. But steel of the same weight but shaped as a bowl, will float. This is because the weight  distributes over a larger area and the steel displaces water equal to its weight. So a heavily laden (=natovorjena) ship floats because its total weight is exactly equal to the weight of the water it displaces.
ARCHIMEDES and EUREKA
Why _____ ships ______ (float) on water when in fact they should sink? Why _____ paper _______ (float) on water and a paperweight sink? Archimedes, the Greek inventor and mat
hematician, accidentally ___________ (discover) 2200 years ago the answer to these questions.
People believe that King Heiro II (a friend of Archimedes) ___________ (order) a new crown of solid gold. For whatever reason, the king ________ (begin) to suspect the goldsmith _________ (forge) the crown of adding silver. The king ________ (ask) Archimedes for help.
Archimedes _______ (go) for one last thinking to see if he _______ (can) resolve the problem once and for all. He _______ (go) to the Syracuse public bath house (which were
common in ancient times) with the  problem in his head while ___________ (have) a bath. Archimedes ________ (fill) the tub with water, and _______ (let) his naked body slowly into water. He ________ (notice) water __________  (spill) over the sides. In a flash, Archimedes ________ (realise) the relation between the water that __________ (fall out) and the weight of his body - in other words he __________ (discover) why some objects ________ (float) and some ________ (sink)! Archimedes _______ (be) so excited with his discovery that he _________ (hop) out of the bath, and __________ (rush) naked into the street while he ____________ (yell) 'Eureka!' 'Eureka!' (Greek: for 'I have found it!).
Archimedes __________ (return) to his place, _________ (fill) a bowl with water and ___________ (place) it in a larger bowl. Then he gently _______ (let) down the crown, and as ____________ (expect), some water ____________ (spill out). Archimedes quickly ____________ (measure) the volume of displaced (=odmaknjena) water and __________ (calculate) the density. When _________ (compare) to the known density of an equal amount of gold, he _________ (notice) that the crown _______ (be) less dense than the gold. This _______ (lead) him to believe that the goldsmith __________ (cheat) the king.
Archimedes discovery, now popular as the Archimedes' principle, _________ (explain) why steel ships, weighing thousands of tons, ________ (float). But what ______ (be) Archi
medes' principle? When a body ______ (be) immersed in water, it ___________ (experience) a force (the buoyancy force). This force ______ (be) equal to the weight of the water displaced by the body.
For instance, a lump of steel will sink for it _____ (be) unable to displace water that _______ (equal) its weight. But steel of the same weight but shaped as a bowl, will float. This ______ (be)  because the weight __________ (distribute) over a larger area and the steel __________ (displace) water equal to its weight. So a heavily laden (=natovorjena) ship _________ (float) because its total weight is exactly equal to the weight of the water it displaces.

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