{"product_id":"gravitas-big-g","title":"Gravitas – Newton’s Constant Big G \/ The Torsion Balance Physics Sticker","description":"\u003cp\u003eGravitas, an ancient titan of The SI Guard, watches two lead spheres tug on two small ones and twist a hair-thin fibre.\u003c\/p\u003e\u003ch3\u003eThe Physics\u003c\/h3\u003e\u003cp\u003eG sets the strength of gravity between any two masses. It is measured with torsion balances (Cavendish, 1798) and other lab methods, where the pull between kilogram-scale masses is about 10⁻⁷ N or less.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eG = 6.674 30(15) × 10⁻¹¹ m³ kg⁻¹ s⁻²\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eG: Newtonian constant of gravitation\u003c\/li\u003e\n\u003cli\u003e(15): standard uncertainty in the last two digits, 2.2 × 10⁻⁵ relative\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eValue: CODATA 2018 and CODATA 2022 (NIST, unchanged). G is measured, not fixed by the 2019 SI. It is the least precisely known of the fundamental constants, and the best experiments still disagree by more than their quoted uncertainties.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eHonest caveat:\u003c\/em\u003e Big G is not little g. G is universal; g ≈ 9.81 m\/s² is the local acceleration at Earth's surface, which varies by about 0.5% between the equator and the poles. The sticker prints the digits of G; the factor × 10⁻¹¹ in SI units is implied.\u003c\/p\u003e\u003ch3\u003eOn the sticker\u003c\/h3\u003e\u003cp\u003eGravitas holds the two glowing spheres of the torsion balance. Printed text: \u003cstrong\u003eGRAVITAS\u003c\/strong\u003e with the line \u003cstrong\u003eG = 6.674 30(15)\u003c\/strong\u003e. Pixel-art kiss-cut vinyl sticker, white, in 2″, 3″, 4″ and 6″ sizes.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"2\" × 2\" \/ White","offer_id":50963655426151,"sku":"41833247413838482499","price":4.99,"currency_code":"USD","in_stock":true},{"title":"3\" × 3\" \/ White","offer_id":50963655458919,"sku":"37372988493714841671","price":6.99,"currency_code":"USD","in_stock":true},{"title":"4\" × 4\" \/ White","offer_id":50963655491687,"sku":"13196988317105282915","price":8.99,"currency_code":"USD","in_stock":true},{"title":"6\" × 6\" \/ White","offer_id":50963655524455,"sku":"99518309256794962890","price":11.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/17776600494240355672_1200.jpg?v=1793665163","url":"https:\/\/pixelatedphysics.com\/tr\/products\/gravitas-big-g","provider":"Pixelated Physics","version":"1.0","type":"link"}