Khan Academy
If you're seeing this message, it means we're having trouble loading external resources on our website. If you're behind a web filter, please make sure that the domains *.kastatic.org and …
Introduction to photoelectron spectroscopy - Khan Academy
In the analytical technique of photoelectron spectroscopy (PES), a sample is ionized using high-energy radiation, and the kinetic energies of the ejected electrons (called photoelectrons) are …
Faça uma doação - Khan Academy
Se você está vendo esta mensagem, significa que estamos tendo problemas para carregar recursos externos em nosso website. Se você está atrás de um filtro da Web, certifique-se …
Khan Academy
Khan Academy
Khan Academy | Free Online Courses, Lessons & Practice
Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of …
Кан Академия - Khan Academy
Ако виждаш това съобщение, значи уебсайтът ни има проблем със зареждането на външни ресурси.
Khan Academy
Nimadir xato ketdi. Qayta urinib koʻring. Eh, xatolikka duch kelgan koʻrinamiz. Siz yangilash qilishingiz kerak. Agar bu muammo takrorlanaversa, bizga xabar bering.
Khan Academy
Mass spectrometry identifies isotopes by measuring the mass-to-charge ratio of ions, helping to determine atomic structure and properties.
Khan Academy
Math: Pre-K - 8th grade; Pre-K through grade 2 (Khan Kids) Early math review; 2nd grade; 3rd grade; 4th grade; 5th grade; 6th grade; 7th grade; 8th grade; 3rd grade math (Illustrative Math …
Кан Академия
Опа. Нещо се обърка. Моля, опитай отново. Опа, изглежда, че нещо се обърка. Трябва да обнови ...