Cạnh của tế bào tinh thể Na là 4,29Ao, hỏi khoảng cách ngắn nhất giữa 2 nguyên tử trong tế bào? A. 3,715 Ao B. 3,725Ao C. 7,43Ao D. 2,145 Ao

Although respiratory organs vary across different organisms, they all contain respiratory surfaces that have a large surface area and are extremely thin. explain why having an extremely thin respiratory surface with a large surface area is advantageous for the process of gas exchange

In pqr m< p=60 m< q= 30 and m

Which of the following has wavelength longer than the wavelength of viable light? a) x rays b) gamma rays c) radios waves d) ultraviolet waves