{"product_id":"dopplerine-doppler-effect-physics-mug","title":"Dopplerine – Doppler Effect Physics Mug","description":"\u003cp\u003eWhy does a siren drop in pitch as it passes? Dopplerine rides the waves. A source moving toward you bunches its wavefronts, so you hear a higher frequency; moving away, they spread and the pitch falls. For sound, f = f0(v + vo)\/(v − vs) for approach. Pixel-art black ceramic mug in 11 or 15 oz; equation, symbols and sources in the physics panel below.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"11oz","offer_id":50420029063271,"sku":"29904204328919128398","price":21.99,"currency_code":"USD","in_stock":true},{"title":"15oz","offer_id":50420029096039,"sku":"60886425723260755440","price":23.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/dopplerine_closeup_2400.png?v=1791690168","url":"https:\/\/pixelatedphysics.com\/products\/dopplerine-doppler-effect-physics-mug","provider":"Pixelated Physics","version":"1.0","type":"link"}