Science Facts Set-36

  • One litre human blood contains about 4,000,000,000 - 11,000,000,000 white blood cells.
  • Tachometer is an instrument used to measure the speed of revolution of a revolving disc or shaft.
  • Sloth bears are used as performing pets due to their tameable nature.
  • Ballistics is the branch of mechanics concerned with the study of projectiles.
  • More than 80% of the total described animal species of the Earth are arthropods.
What Is an Arthropod? (Science of Living Things)
  • Silicon is the second most abundant element in the Earth's crust (the first being Oxygen).
  • As gamma rays are a form of ionizing radiation, they pose severe health hazard when absorbed by living tissue.
  • The mass of Planet Saturn is roughly 95.152 times the mass of the Earth.
  • Capillary feed fountain pen was invented by Lewis Edson Waterman.
  • Polar bears are nearly invisible under infrared photography.
Polar Bears

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