[QUESTION FROM SCIENCE GENERAL BOOK STD.8]
1}On Basis of archimedes principle how do you explain the observation in this experiment?
2}what are industrial uses of principal?
3}Some foods contain microorganisms. For example, curd and buttermilk contain lactobacilli. Even then such food are included in diet.why?
1}On Basis of archimedes principle how do you explain the observation in this experiment?
2}what are industrial uses of principal?
3}Some foods contain microorganisms. For example, curd and buttermilk contain lactobacilli. Even then such food are included in diet.why?
Answers & Comments
Answer:
1) Loss in weight of body = Weight of water (liquid) displaced by the body = Buoyant force or upthrust exerted by water (any liquid) on the body. It was Archimedes who first observed that bodies lose their weight when immersed in water. Some bodies, if dropped in water, sink, such as a stone or a metallic needle.
2) It is used in designing ships and submarines. It is used in lactometers to determine the purity of milk. It is used in hydrometers to determine the density of fluids. It is used in hydraulic lifts.
3) Buttermilk is a dairy drink. Originally, buttermilk was the liquid left behind after churning butter out of cultured cream. This type of buttermilk is now specifically referred to as traditional buttermilk and the fermented dairy product is known as cultured buttermilk. This produced from cow's milk and has a characteristically intense sour taste caused by lactic acid bacteria. This variant is made using one of two species of bacteria—either Lactococcus lactis or Lactobacillus bulgaricus, which creates more tartness.
Explanation:
1) The results obtained confirm Archimedes' Principle. They prove that: When a body is partly or completely immersed in water, it loses weight. A body loses its maximum weight when it is completely immersed in water.
2)The Archimedes' principle has applications in the field of industry and defense. The principle is used submarines, their designs, and related stuff. It is also used while building ships.
3) Buttermilk is a dairy drink. Originally, buttermilk was the liquid left behind after churning butter out of cultured cream. This type of buttermilk is now specifically referred to as traditional buttermilk and the fermented dairy product is known as cultured buttermilk. This produced from cow's milk and has a characteristically intense sour taste caused by lactic acid bacteria. This variant is made using one of two species of bacteria—either Lactococcus lactis or Lactobacillus bulgaricus, which creates more tartness.