{"product_id":"resonance-apparatus","title":"Resonance Apparatus – Speed of Sound in Air","description":"\u003cp\u003eInvestigate resonance, wavelength, frequency and the speed of sound in air using this classroom resonance apparatus. By adjusting the length of an air column above water and holding a vibrating tuning fork over the opening, students can identify resonant positions and explore the relationship between air-column length and sound frequency.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eDemonstrates resonance in an air column above water\u003c\/li\u003e\n\u003cli\u003eSupports investigations into standing waves, wavelength and frequency\u003c\/li\u003e\n\u003cli\u003eUses a tuning fork of known frequency to excite the air column\u003c\/li\u003e\n\u003cli\u003eAllows measurement of the resonant air-column length\u003c\/li\u003e\n\u003cli\u003eSuitable for secondary school physics and acoustics experiments\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eClassroom Applications\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eInvestigate resonance in a tube closed at one end by water\u003c\/li\u003e\n\u003cli\u003eExplore the quarter-wavelength approximation for the first resonance\u003c\/li\u003e\n\u003cli\u003eEstimate the speed of sound using \u003cstrong\u003ev = f × λ\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eCompare measured values and discuss experimental uncertainty, including end correction\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eHow It Works\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eHold a vibrating tuning fork just above the opening of the tube, without touching it. Adjust the water level to vary the length of the air column and listen for an increase in sound intensity at resonance. For the lowest resonant mode, the air-column length is approximately one-quarter of the wavelength; more accurate results account for the tube's open-end correction.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAdditional Equipment\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eA suitable tuning fork of known frequency is required for the investigation. Please confirm the supplied contents before ordering; the existing product information does not establish whether a tuning fork is included.\u003c\/p\u003e","brand":"Delta Education","offers":[{"title":"Default Title","offer_id":51044932681959,"sku":"46RA","price":89.8,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0747\/3922\/0711\/files\/46RA.jpg?v=1791761101","url":"https:\/\/deltaed.co.nz\/products\/resonance-apparatus","provider":"Delta Educational Supplies Limited","version":"1.0","type":"link"}