[{"question":"Ak\u00fd rozsah frekvenc\u00ed dok\u00e1\u017ee \u013eudsk\u00fd hlas vyd\u00e1va\u0165?","answers":["150 Hz - 150 000 Hz","450 Hz - 1800 Hz","20 Hz - 20 000 Hz","85 Hz - 1100 Hz"],"correct":"85 Hz - 1100 Hz","order":"1"},{"question":"\u010co je to infrazvuk?","answers":["zvuk s frekvenciou men\u0161ou ako 20 Hz","zvuk s frekveciou v\u00e4\u010d\u0161ou ako 20 Hz","zvuk s frekvenciou v\u00e4\u010d\u0161ou ako 20 000 Hz","zvuk s frekvenciou men\u0161ou ako 20 000 Hz"],"correct":"zvuk s frekvenciou men\u0161ou ako 20 Hz","order":"2"},{"question":"\u010co nie je zdrojom infrazvuku?","answers":["pohybuj\u00face sa stroje","podlahy a steny","my\u0161","slon"],"correct":"my\u0161","order":"3"},{"question":"Ako vid\u00ed u\u0161ami v tme netopier?","answers":["vyd\u00e1va infrazvuk a po\u010d\u00fava, z ktorej strany k nemu prich\u00e1dza odrazen\u00fd zvuk","vyd\u00e1va ultrazvuk a po\u010d\u00fava, z ktorej strany k nemu prich\u00e1dza odrazen\u00fd zvuk","zvuky prich\u00e1dzaj\u00face z okolia vie roztriedi\u0165 a zaradi\u0165, \u010do ich vyd\u00e1va a odkia\u013e","nie je to pravda, v tme vid\u00ed zrakom"],"correct":"vyd\u00e1va ultrazvuk a po\u010d\u00fava, z ktorej strany k nemu prich\u00e1dza odrazen\u00fd zvuk","order":"4"},{"question":"Kto nevyu\u017e\u00edva sonar?","answers":["ryb\u00e1ry, na h\u013eadanie st\u00e1da r\u00fdb","n\u00e1morn\u00edci, na meranie h\u013abky mora","vojaci, na h\u013eadanie ponorky","letci na meranie v\u00fd\u0161ky"],"correct":"letci na meranie v\u00fd\u0161ky","order":"5"},{"question":"Ako funguje ultrazvukov\u00fd pr\u00edstroj na vy\u0161etrenie tehotn\u00fdch \u017eien?","answers":["ultrazvuk sa \u0161\u00edri rovnakou r\u00fdchlos\u0165ou vo v\u0161etk\u00fdch tkaniv\u00e1ch tela, a preto n\u00edm \u013eahko prejde","zachyt\u00e1va ultrazvuk, ktor\u00fd die\u0165a vyd\u00e1va","ke\u010f ultrazvuk naraz\u00ed na rozhranie medi m\u00e4kk\u00fdm a tvrd\u00fdm tkanivom, \u010das\u0165 sa ho odraz\u00ed","na vy\u0161etrenie tehotn\u00fdch \u017eien sa pou\u017e\u00edva r\u00f6ntgen, nie ultrazvuk"],"correct":"ke\u010f ultrazvuk naraz\u00ed na rozhranie medi m\u00e4kk\u00fdm a tvrd\u00fdm tkanivom, \u010das\u0165 sa ho odraz\u00ed","order":"6"},{"question":"\u010co je to dozvuk?","answers":["zvuk s frekvenciou men\u0161ou ako 20 Hz","zvuk, ktor\u00fd prenik\u00e1 dovn\u00fatra materi\u00e1lu","mnohon\u00e1sobn\u00e1 ozvena","zvuk s frekvenciou v\u00e4\u010d\u0161ou ako 20 000 Hz"],"correct":"mnohon\u00e1sobn\u00e1 ozvena","order":"7"},{"question":"\u010co je to ultrazvuk?","answers":["zvuk s ve\u013emi vysokou frekvenciou, ktor\u00fd u\u017e nem\u00f4\u017eeme po\u010du\u0165","zvuk s ve\u013emi n\u00edzkou frekvenciou, ktor\u00fd u\u017e nem\u00f4\u017eeme po\u010du\u0165","zvuk zlo\u017een\u00fd z viacer\u00fdch frekvenci\u00ed","mnohon\u00e1sobn\u00e1 ozvena"],"correct":"zvuk s ve\u013emi vysokou frekvenciou, ktor\u00fd u\u017e nem\u00f4\u017eeme po\u010du\u0165","order":"8"},{"question":"Ako je odstr\u00e1nen\u00fd ultrazvuk v divadeln\u00fdch s\u00e1lach?","answers":["steny h\u013eadiska s\u00fa \u010dlenit\u00e9 s balk\u00f3nmi a vy\u010dnievaj\u00facimi ozdobami","strop s\u00e1ly je hladk\u00fd a m\u00e1 tvar obr\u00e1tenej misy","div\u00e1ci sedia na zvy\u0161uj\u00facich sa stupienkoch","v divadeln\u00fdch s\u00e1lach je odstr\u00e1nen\u00fd dozvuk"],"correct":"v divadeln\u00fdch s\u00e1lach je odstr\u00e1nen\u00fd dozvuk","order":"9"},{"question":"\u010co je to akustika?","answers":["mnohon\u00e1sobn\u00e1 ozvena","n\u00e1uka o zvuku","rozsah frekvenci\u00ed zvuku","v\u00fd\u0161ka zvuku"],"correct":"n\u00e1uka o zvuku","order":"10"}]