Answer:
100nm-280nm
Explanation:
Ultraviolet rays (UV) are part of the electromagnetic spectrum. It goes from 10nm to 400nm wavelengths, they are shorter than visible light, thus it's impossible to see by a human eye, and larger than X-rays (used in many medical applications and harmful when long-exposed).
According to its wavelengths, UV can be divided in different types:
UVA: long wave UV (315nm-400nm)
UVB: medium-wave UV (280nm-315nm)
UVC: short wave UV (100nm-280nm)
Therefore, UVC comprises wavelengths between 10nm and 280nm.
(1) sin 40° = n(sin 200⁰).
1. A ray of light traveling from air into crown glass strikes the surface at an angle of 30°.
Answer: From the location of elements in the periodic table you can predict it's properties. The elements are arranged in the modern periodic table in the order of increasing atomic number. The rows are called periods and the columns, groups. ... These elements have the same number of electrons in their outermost (valence) shells.
Explanation:
atomic 13 tells us that the atomic weight which is 26.982. and the m.p. is 660 degrees celcius
It is important to pay attention to the fundamental units in the given information of physics problems; if you carefully arrange a system so the units cancel out appropriately, the answer is usually correct.
Force is mass x acceleration<span>, </span><span>and the units of force are (Kg/m</span>·s²). In this system, a 10 Kg system is accelerated by 5 m/s². Simply multiply:
10 Kg x 5 m/s² = 50 Kg·m/s² = 50 Newtons
