Newton’s cradle, action and reaction concept, series of swinging spheres, device that demonstrates conservation of momentum and energy

array(4) {
  ["_type"]=>
  string(1) "_"
  ["title"]=>
  string(8) "Facebook"
  ["url"]=>
  string(48) "https://www.facebook.com/Zlatocz-396706033870780"
  ["icon"]=>
  string(5) "58000"
}

array(4) {
  ["_type"]=>
  string(1) "_"
  ["title"]=>
  string(7) "Twitter"
  ["url"]=>
  string(28) "https://twitter.com/Zlato_cz"
  ["icon"]=>
  string(5) "58001"
}

array(4) {
  ["_type"]=>
  string(1) "_"
  ["title"]=>
  string(7) "YouTube"
  ["url"]=>
  string(56) "https://www.youtube.com/channel/UCVWPOKZYq9mvnrTfi4WiIag"
  ["icon"]=>
  string(5) "58002"
}