Everyday Science MCQs
Q The sounds of which frequency are human beings most sensitive?
  • A A. 400 hertz
  • B B. 20 hertz
  • C C. 20000 hertz
  • D D. 5000 hertz
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Word of the Day
16 Jul
Volatile
(of a substance) easily evaporated at normal temperatures.
Ψ¨Ψ―Ω„ΨͺΫ’ Ω…Ψ²Ψ§Ψ¬ ΩˆΨ§Ω„Ψ§ΨŒ کافور ءفΨͺ

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