The answer is D. They already knew about animals, plants and skin.
The answer is B. Snake.
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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
D) strongly acid
<h3>Explanation</h3>
A neutral solution have a pH of 7. All the solutions with a pH less than 7 are acid, and the more they tend to 0, the more they are acid. Viceversa with the solutions with pH greater than 7