[{"question":"Ktor\u00fd vedn\u00fd odbor sa zaober\u00e1 vznikom zvuku a jeho \u0161\u00edren\u00edm?","answers":["aritmetika","akustika","mechanika","dynamika"],"correct":"akustika","order":"1"},{"question":"Zvuk je mechanick\u00e9 vlnenie s frekvenciou v intervale:","answers":["16Hz -160Hz","160Hz -1600Hz","160Hz - 6000Hz","16Hz - 16kHz"],"correct":"16Hz - 16kHz","order":"2"},{"question":"Mechanick\u00e9 vlnenie s ni\u017e\u0161ou frekvenciou ako je 16Hz sa vol\u00e1:","answers":["infrazvuk","ultrazvuk","prah po\u010dutia","prah bolesti"],"correct":"infrazvuk","order":"3"},{"question":"\u010co najviac vpl\u00fdva na r\u00fdchlos\u0165 zvuku v danom prostred\u00ed?","answers":["tlak","teplo","teplota","pra\u0161nos\u0165"],"correct":"teplota","order":"4"},{"question":"R\u00fdchlos\u0165 \u0161\u00edrenia sa zvuku vo vzduchu je pribli\u017ene:","answers":["66ms-1<\/sup>","3300ms-1<\/sup>","660ms-1<\/sup>","330ms-1<\/sup>"],"correct":"330ms-1<\/sup>","order":"5"},{"question":"Kde je najv\u00e4\u010d\u0161ia r\u00fdchlos\u0165 \u0161\u00edrenia zvuku:","answers":["destilovan\u00e1 voda","voda","oce\u013e","vzduch"],"correct":"oce\u013e","order":"6"},{"question":"Ozvena m\u00f4\u017ee vznikn\u00fa\u0165 ak je odrazn\u00e1 plocha vo vzdialenosti:","answers":["19m","17m","14m","11m"],"correct":"17m","order":"7"},{"question":"Pre\u010do je infrazvuk nebezpe\u010dn\u00fd pre \u010dloveka?","answers":["m\u00f4\u017ee d\u00f4js\u0165 k interferencii a k mechanick\u00e9mu po\u0161kodeniu buniek","nepo\u010dujeme ho a preto m\u00e1me z toho zl\u00fa n\u00e1ladu","vpl\u00fdva na stravovacie n\u00e1vyky \u010dloveka","\u0161kod\u00ed n\u00e1\u0161mu sluchu"],"correct":"m\u00f4\u017ee d\u00f4js\u0165 k interferencii a k mechanick\u00e9mu po\u0161kodeniu buniek","order":"8"},{"question":"Zvukov\u00e9 vlny sa \u0161\u00edria r\u00fdchlos\u0165ou 340ms-1<\/sup>. Vzdialenos\u0165 susedn\u00fdch uzlov stojat\u00fdch v\u013an je 20cm. Akou frekvenciou kmit\u00e1 zdroj?","answers":["85kHz","8500Hz","580hz","850Hz"],"correct":"850Hz","order":"9"},{"question":"V ktorom prostred\u00ed sa zvuk ne\u0161\u00edri?","answers":["drevo","v\u00e1kuum","vzduch","voda"],"correct":"v\u00e1kuum","order":"10"}]