• The learning process is entertaining and exciting
  • The solved tasks turn into coordinates
  • The chance to follow your progress
  • Along with your schoolmates and friends, go on an adventure, searching for hideouts
Contact info
  • E-mail:

41.3. Ultrasound, Infrasound and sound usage.

Check the correct answer!

Ventilators sound frequency is 18 Hz. What types of sound it this?
Sound nowadays.
Ultrasound, Infrasound and sound usage.

Solve tasks to find hidden Geo point coordinates

  1. Algebra: Median
  2. Algebra: Relative frequency
  3. Geometry: Distance between parallel straight lines.
  4. Physics: Light reflection and mirrors.
  5. Algebra: Equation with unknown denominator.
  6. Chemistry: Substances physical properties and transformations.
  7. Geometry: Diameter, which is perpendicular to chord, properties.
  8. Algebra: Fractions main property
  9. Geometry: Area of parallelogram, rhomb, triangle, right angled triangle and trapeze.
  10. Algebra: Formula y = k/x
  11. Algebra: Numerical approximation.
  12. Geometry: Rectangular (S = ab, a, b - edges) and area of the square (S=a^2 , a - edge) formula.
  13. Chemistry: Atoms un ķīmiskie elementi.
  14. Geometry: Rectangle (S = ab, a, b - edges) and area of the square (S=a^2 , a - edge) formulas
  15. Geometry: Squar, properties and signs.
  16. Chemistry: Air composition and usage(reactions).
  17. Physics: Gravitation, friction and deformation.
  18. Geometry: Right-angled triangle outlined circle lines center location.
  19. Chemistry: Gas volume calculations
  20. Physics: Ultrasound, Infrasound and sound usage.
  21. Geometry: Triangle median properties.
  22. Algebra: Square root extraction
  23. Chemistry: Periodic table of chemical elements and atomic structure.
  24. Algebra: Fraction addition and subtraction.
  25. Algebra: Absolute and relative mistake of approximation
  26. Geometry: Rectangular (S = ab, a, b - edges) and area of the square (S=a^2 , a - edge) formula.
  27. Algebra: Actual numbers.
  28. Physics: Measurement.
  29. Physics: Spread of sound.
  30. Algebra: Parabola.
  31. Physics: mass
  32. Physics: Archimedes law.
  33. Algebra: Albraic fraction.
  34. Geometry: Curve angle value, center angle and indrawn angle.
  35. Algebra: Numerical approximation.
  36. Geometry: The Pythagorean Theorem. The practical application of Pythagorean Theorem in everyday life.
  37. Algebra: Square trinomial roots
  38. Geometry: Area of parallelogram, rhombus, triangle, right-angled triangle, trapeze.
  39. Algebra: Square trinomial distribution into multipliers
  40. Algebra: Rational fraction expression.
  41. Algebra: Moda
  42. Algebra: Fraction amplification and abbreviation.