Answer:
B. Chemical changes involve the formation of a new substance.
Explanation:
They can both release energy, both can be measured, and chemical changes can be caused by oxygen, so I believe it would be B.
Answer:
The blue one.
Explanation:
Im pretty sure its because the blue is hotter.
Answer:
The wavelength of the laser, λ = 5.625 * 10⁻⁷ m
Explanation:
Separation of the narrow slits, d = 7.5 * 10⁻⁵ m
The distance between the screen and the two slits, d = 4m
The distance between the bright spot and the center of the pattern, Y = 1.5 cm
Y = 1.5 * 10⁻² m
To calculate the wavelength, λ, of the laser we will use the relationship:
λ = 5.625 * 10⁻⁷ m
<span>Archaeologists carry out excavations in order to collect data that they eventually analyze to learn more about the past.</span>
Atomic mass is equal to the number of protons and neutrons. Electrons have so little mass that they are practically negligible.
Atomic mass= 4+4= 8 AMU