{"product_id":"mercury-at-4-2-k-plate-061-physics-poster","title":"Mercury at 4.2 K – Plate 061 Physics Poster","description":"\u003cp\u003ePlate 61 speaks for itself: \u003cem\u003e“Cold mercury: resistance drops to zero.”\u003c\/em\u003e\u003c\/p\u003e\u003ch3\u003eThe Physics\u003c\/h3\u003e\u003cp\u003eKamerlingh Onnes cooled mercury with liquid helium in 1911 and saw its resistance vanish abruptly near 4.2 K: the discovery of superconductivity.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eR(T \u0026lt; T_c) = 0\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eR: electrical resistance, Ω\u003c\/li\u003e\n\u003cli\u003eT: temperature, K\u003c\/li\u003e\n\u003cli\u003eT_c: critical temperature, ≈ 4.15 K for mercury\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eMercury, cooled by liquid helium. Near 4.2 K, R became unmeasurable.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eHonest caveat:\u003c\/em\u003e 'Zero' means below any measurable value; persistent-current experiments later bound it far below normal resistance.\u003c\/p\u003e\u003ch3\u003eSources\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eH. Kamerlingh Onnes, Commun. Phys. Lab. Univ. Leiden 120b (1911).\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eOn the poster\u003c\/h3\u003e\u003cp\u003ePlate 061, “Mercury at 4.2 K”: the pixel-art plate with its slogan “Cold mercury: resistance drops to zero.”, the key equation and the facts panel shown above. Pixelated Physics. Physics. Personified.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"9'' x 12\" (Vertical) \/ Matte","offer_id":50962572378215,"sku":"23605543137716466196","price":19.99,"currency_code":"USD","in_stock":true},{"title":"9'' x 12\" (Vertical) \/ Fine Art","offer_id":50962572410983,"sku":"11209631979554983020","price":29.99,"currency_code":"USD","in_stock":true},{"title":"9'' x 12\" (Vertical) \/ Semi Glossy","offer_id":50962572443751,"sku":"16677524621858634748","price":19.99,"currency_code":"USD","in_stock":true},{"title":"18″ x 24″ (Vertical) \/ Fine Art","offer_id":50962572476519,"sku":"66284408736572471156","price":44.99,"currency_code":"USD","in_stock":true},{"title":"18″ x 24″ (Vertical) \/ Semi Glossy","offer_id":50962572509287,"sku":"31014314052063981702","price":29.99,"currency_code":"USD","in_stock":true},{"title":"18″ x 24″ (Vertical) \/ Matte","offer_id":50962572542055,"sku":"82082803262128737365","price":29.99,"currency_code":"USD","in_stock":true},{"title":"36'' x 48\" (Vertical) \/ Matte","offer_id":50962572574823,"sku":"11426636477878883894","price":69.99,"currency_code":"USD","in_stock":true},{"title":"36'' x 48\" (Vertical) \/ Fine Art","offer_id":50962572607591,"sku":"22709271985537594451","price":119.99,"currency_code":"USD","in_stock":true},{"title":"36'' x 48\" (Vertical) \/ Semi Glossy","offer_id":50962572640359,"sku":"28453690638878452437","price":69.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/10372985435963358428_2048.jpg?v=1793634981","url":"https:\/\/pixelatedphysics.com\/ja\/products\/mercury-at-4-2-k-plate-061-physics-poster","provider":"Pixelated Physics","version":"1.0","type":"link"}