Um consumidor, ao sair para comprar lâmpadas para a sua casa, se deparou com três tipos, lâmpadas incandescentes, fluorescentes e de LED. Ele precisa de uma lâmpada que ilumine e produza calor para colocar em seu viveiro de lagartos. Qual lâmpada ele deve escolher?

Two polarizers are oriented at 40∘ to each other and plane-polarized light is incident on them. if only 16 percent of the light gets through both of them, what was the initial polarization direction of the incident light?

Awoman holds a book by placing it between her hands such that she presses at right angles to the front and back covers. the book has a mass of m = 1.8 kg and the coefficient of static friction between her hand and the book is μs = 0.67. no attempt 50% part (a) what is the weight of the book, fgb in newtons?

Ethanol has a heat of vaporization of 38.56 kj/mol and a normal boiling point of 78.4 c. what is the vapor pressure of ethanol at 14 c?