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  • The solved tasks turn into coordinates
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  • Along with your schoolmates and friends, go on an adventure, searching for hideouts
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39.1. Sounds reception.

Tick the correct answer(more than one answer is possbile)!

The cat's ear oscillation frequency of the sound waves is from 100 Hz to 32 kHz, but the dogs are able to receive sounds in the range from 40 Hz to 46 kHz. Which frequency sound can both dogs and cats hear?
Sound nowadays.
Sounds reception.

Solve tasks to find hidden Geo point coordinates

  1. Algebra: Rational numbers.
  2. Geometry: Pythagorean theorem. Right angled triangle signs.
  3. Algebra: Numerical approximation.
  4. Geometry: Parallelogram, elements. Properties and signs.
  5. Physics: Lighting and safety.
  6. Algebra: Square root properties
  7. Geometry: Rectangular (S = ab, a, b - edges) and area of the square (S=a^2 , a - edge) formula.
  8. Algebra: Periodical decimal fractions.
  9. Chemistry: Substances with constant composition. Chemical formula.
  10. Physics: Heat process diagram.