Một tia laser được phát ra từ nguyên tử nitơ có bước sóng 337 nm và có tổng năng lượng là 3,87 mJ. A) Tia laser trên thuộc vùng quang phổ nào của dãy quang phổ điện từ?

B)Tia laser đó chứa bao nhiêu photon?

Biết: vận tốc ánh sáng C = 3,0.108 (ms-1); hằng số Planck h = 6,626.10-34 (Js).

If blood contains 150g of hemoglobin per liter of blood, how much hemoglobin would be contained in 10 ml of blood

How can a give a full method for the experiment of separating sand from water by filtration? 1-materials 2-steps 3-conclusion also for water and salt separated by the evaporation or distillation process

Essay-alternative energy sources research sources of energy that are being developed. write a report of 350-400 words discussing the information you learned concerning the development of various energy sources and the impact that you think they will have on your life. include sources cited at the end of your report using the mla format. follow the rubric guidelines. note that wikipedia is not an appropriate resource for a research paper. worth 99