Xana Iyini Mahiselo?

© Leonie Joubert
Mahiselo i mpimo wa ntolovelo wa matimba ya mbango naswona switala ku hlohleteriwa hi miseve ya dyambu.
Mahiselo iku pima ntsena naswona switirhisiwa, xikan’we na kun a kampfula eka ndzhawu, ku tiva swimilani leswinga byariwaka swimilaka eka ndzhawu yokarhi. Hambiswiritano, mindzelekani ya mahiselo yofana na mahiselo ya siku kumbe ya nguva, mahiselo yale hansi nay ale henhla, navusiku na nanhlekani yafanele ku tekeriwa enhlokweni eka leswi swimilani swingata kurisa xiswona eka ndzhawu yoleyo.

Mahiselo yana xiave xokarhi eka swivumbeko hinkwaswo swa vutomi emisaveni. Switisa ntshamiseko wa munhu kumbe ku pfumaleka ka ntshamiseko (and a need for heating or cooling), swihlamusela hi ndlela leyi swifuwo na swimilani swi khomekisaka xiswona, ku humelela ka switsotswana na mavabyi xikan’we na mahahelo ya mati kusuka eka misava ku katsa naku haha ka mati ematlukeni.

Ya Pimiwa Njhani Mahiselo?

Mahiselo lawa tirhisiwaka eka kukurisa swimilani naleka mapurasi ya pimiwa tani hi mahiselo ya moya. Leswi swipimiwa kusuka endzeni ka mindzhuti leswi vuriwaka Stevenson screens kumbe ventilated radiation shields. Mindzhuti leyi yivekiwa eka 2 m ehenhla ka misava, ekusuhi na levele ya matluka ya swimilani.
Mahiselo ya moya yanga hambana kusuka eka mahiselo ya misava. Navusiku hi xixika, mahiselo ya misava yale hansi swinene kutlula lawa yanga eka screen lexi pimaka mahiselo. Leswi swinga vanga leswaku kuva na gwitsi hambi leswi vavhumbi va tamaxelo vangavaka va nga langutelangi gwitsi eka mahiselo ya moya. Hambiswiritano mahiselo ya misava yangava ya kufumela nyana kutlula mahiselo ya moya exikarhi ka siku kuya hi xivumbeko xa misava ya kona.

Mahiselo ya moya lowu pfulekeke swinga endla leswaku yava lawa ya kufumelaka kutlula mahiselo ya screen, ngopfu ngopfu hi ximumu.
Mahiselo ya matluka lawa yanga dyambyini yatala kuva eka 3 - 4ºC ehenhla kutlula mahiselo ya mpimo wa screen. Kuhambana ku hunguteka kuya kwalomu ka 1ºC ehansi ka ndzhuti naswona loko mahiselo ya hundza 33ºC.
Matluka lawa yanga bumbula yangava eka 10 - 15ºC hiku hisa kutlula moya lowu pimiweke.

Ndlela yo Cinca Celsius kuya eka Fahrenheit

©David Eccles
E Afrika Dzonga, mahiselo ya pimiwa hiti degrees Celsius (ºC). Mati ya gwitsirisiwa eka 0ºC kutani ya vila eka 100ºC (at sea level). E tikweni ra USA mahiselo yaha vikiwa hiti degrees Fahrenheit. Eka xikalu xa Fahrenheit, mati ya gwitsirisiwa eka 32ºF naswona ya vila eka 212ºF.

Translated by Ike Ngobeni