Question 2789
{"accessible":false,"alternatives":[{"id":13608,"text":"m/s"},{"id":13609,"text":"kg/m^2s"},{"id":13610,"text":"W/cm^2"},{"id":13611,"text":"kg/m^3"},{"id":13612,"text":"dB"}],"archived":false,"correctAlternativeId":13609,"explanation":"\u003cp\u003e\u003cstrong\u003eAcoustic impedance = p (density) x c (speed)\u003c/strong\u003e\u003c/p\u003e\u003cp\u003eDensity = kg/m\u003csup\u003e3\u003c/sup\u003e\u003c/p\u003e\u003cp\u003eSpeed = m/s\u003c/p\u003e\u003cp\u003eTherefore, SI units for acoustic impedance = kg/m\u003csup\u003e2\u003c/sup\u003es\u003c/p\u003e","id":2789,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/2789","nextQuestionPath":"/articles/decibel/questions/2786","relatedArticles":[{"id":32118,"title":"Acoustic impedance","link":"/articles/acoustic-impedance?lang=us"},{"id":46915,"title":"Propagation speed","link":"/articles/propagation-speed?lang=us"},{"id":58659,"title":"International System of Units","link":"/articles/international-system-of-units-1?lang=us"}],"alsoUsedIn":[{"id":1608,"kind":"RestrictedPage","title":"Page 1608 (in no courses)","link":"https://radiopaedia.org/admin/restricted_pages/1608"},{"id":1972,"kind":"Course","title":"Imaging Physics: Ultrasound Peer Review - page 1972","link":"https://radiopaedia.org/courses/imaging-physics-ultrasound-peer-review/pages/1972"},{"id":1972,"kind":"Course","title":"Imaging Physics: Ultrasound - page 1972","link":"https://radiopaedia.org/courses/imaging-physics-ultrasound/pages/1972"}],"stem":"\u003cp\u003eAcoustic impedance is measured in Rayls. What is the SI unit for Rayls?\u003c/p\u003e","menuLinks":[{"text":"Report problem with question","url":"https://docs.google.com/forms/d/e/1FAIpQLSfO3soWYhOjJ7yErSysyCe5V4A1CqW7WK3rDA7MtAkecMGqNw/viewform?entry.1624461248\u0026entry.553583435=https://radiopaedia.org/questions/2789"}],"attemptsPercentages":[{"alternativeId":"13608","percentage":2},{"alternativeId":"13609","percentage":74},{"alternativeId":"13611","percentage":6},{"alternativeId":"13610","percentage":14},{"alternativeId":"13612","percentage":5}],"promptToLogin":false,"questionManager":false,"articleId":"decibel"}