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Ce? Unde? Cind?

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De ce, când o rază de lumină cade pe un CD-ul, poți vedea toate culorile curcubeului? Acest lucru se datorează faptului că lumina pătrunde în disc reflectă undele luminoase de diferite lungimi de undă, sub diferite unghiuri.
De ce la arderea petrolului lampant nu poate fi stins cu apă? Densitatea petrolului lampant este mai mică decât a apei, așa că va rămâne în continuare la suprafață și va continua să ardă!
Stăpâna casei, unde era Holmes, se apropia de ușă, o deschise și lasă o pisică în cameră. Privind pisica, Sherlock Holmes a declarat: "Vremea afară este rece" Cum a determinat? După blana pisicii. Atunci când vremea este rece, lâna devine mai pufoasă, astfel că între fibre există mai mult aer - un rău conductor de căldură .
Created by: Gorincioi
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