Physics

  1. How fast is sound?
  2. Sound waves do not propagate instantly. This can be seen in the
  3. physics/how-fast-is-sound.htm
  4. How do you measure time?
  5. The calculation of the passage of time is based on the rotation
  6. physics/how-do-you-measure-time.htm
  7. What is the speed of light?
  8. The astronomers Bradley, Fizeau and Roemer created a series of procedures to
  9. physics/the-speed-of-light.htm
  10. What is the atom?
  11. In the fourth century BC the Greeks established that matter was made
  12. physics/what-is-the-atom.htm
  13. What is ultrasound?
  14. It is the very high frequency sound, generally over 20,000 hertz. It
  15. physics/what-is-ultrasound.htm
  16. What is inertia?
  17. The inertia is the tendency of bodies to remain in the state
  18. physics/what-is-inertia.htm
  19. What are pulleys?
  20. The pulleys are machines, ie devices used to modify forces or their
  21. physics/what-are-pulleys.htm
  22. How does the lever?
  23. A bar or lever is a rigid structure, which is based on
  24. physics/how-does-the-lever.htm
  25. What is the molecule?
  26. One molecule is a group of atoms and is the smallest unit
  27. physics/what-is-the-molecule.htm
  28. How is nuclear energy?
  29. Nuclear power is derived from the transformation of a mass of matter.
  30. physics/how-is-nuclear-energy.htm
  31. What are the differences between weight and mass?
  32. The weight is the result of the action that exerts the force
  33. physics/what-are-the-differences-between-weight-and-mass.htm
  34. How do thermometers?
  35. The thermometer is the instrument to measure temperature. Use numeric values determined
  36. physics/how-do-thermometers.htm
  37. What is magnetism?
  38. Magnetism is the force of attraction exercised by bodies such as magnets,
  39. physics/what-is-magnetism.htm
  40. How is solar energy generated?
  41. The sun's energy is released from the nuclear fusion of hydrogen atoms
  42. physics/how-is-solar-energy-generated.htm
  43. What are nuclear fission and fusion?
  44. Nuclear fission is the division dl nucleus of an atom by its
  45. physics/what-are-nuclear-fission-and-fusion.htm
  46. What is the theory of relativity?
  47. The theory of relativity was formulated by German physicist Albert Einstein (1879
  48. physics/what-is-the-theory-of-relativity.htm
  49. What is electricity?
  50. This discipline, which depends on physics, deals with the study of electric
  51. physics/what-is-electricity.htm
  52. What are X-rays?
  53. X-rays are electromagnetic waves of short length, ie, light rays are not
  54. physics/what-are-x-rays.htm
  55. Why does rain fall?
  56. A portion of water from rivers, seas and rivers evaporates by the
  57. physics/why-does-rain-fall.htm
  58. What are the reflection and refraction?
  59. The reflection and refraction, which are studied in optics, are phenomena that
  60. physics/what-are-the-reflection-and-refraction.htm