Ntsuab tais, jam-jars thiab txawm iav qhov rooj-kub tau cuam tshuam rau kev tsom tshav ntuj txausua rau smouldering, ua raws li cov nplai tag nrho. … Cov tsom iav tsom iav ua qhov no tau zoo heev, cuam tshuam cov rays thiab coj lawv mus rau qhov pom tseeb.
Puas iav ua kom tshav ntuj?
Virtually all commercial and automobile iav thaiv UVB rays. Raws li qhov tshwm sim, koj yuav tsis tuaj yeem ua rau koj cov vitamin D nce ntxiv los ntawm kev zaum ntawm lub qhov rais tshav ntuj, txawm tias ntau ntawm UVA hluav taws xob yuav nkag mus rau iav thiab tej zaum yuav ua rau muaj teeb meem.
Lub qhov rais puas pom lub teeb?
ci ntsa iab-tshwj xeeb yog tsom iav-rov qab lub teeb. … Daim iav ze rau koj lub qhov rais ua kom lub teeb pom kev zoo los ntawm bouncing nws rau hauv koj qhov chaw, ua rau lub qhov rais xav tias loj dua thiab ci dua.
iav nce cua sov?
iav muaj qis thermal conductivity, tab sis kuj pob tshab. Yog li lub hnub lub teeb nkag mus txawm tias lub qhov rais pob tshab, tig mus rau hauv tshav kub, thiab tom qab ntawd tsis tuaj yeem tawm sab nraud. Cuam tshuam, cov cua sov sib sau ntawm huab cua ze ntawm lub qhov rais, thiab qhov ntawd yog qhov koj xav tau.
Yuav ua li cas thaum lub hnub ci ntsa iab los ntawm iav?
Tshwj xeeb, koj tuaj yeem tau txais suntan los ntawm lub qhov rais! Feem ntau ntawm cov iav nqus ib ncig ntawm 97 feem pua ntawm lub hnub UVB rays - cov uas ua rau tshav kub hnyiab thiab qee cov qog nqaij hlav ntawm daim tawv nqaij. Thaum lub iav yuav nqus tau 37 feem pua ntawm cov hluav taws xob tsawg dua UVA, tus kws tshaj lij Luis Villazon hais rau Science Focus.
