The phenomenon of remaining on the surface of a liquid without sinking is called
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In earlier times, ______ was not as easily available as it is available today.
Which of the following machines convert the energy of free-flowing water into useful forms of power?
Which of the following show expansion on heating and contraction on cooling?
What do we call the animals that are capable of living both on land and in the water?
Which of the following keep the water cool so that thirsty travelers can have cold water?
Which of the following aquatic plants are used by humans as a food source?
180 videos|471 docs|221 tests
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180 videos|471 docs|221 tests
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