Answer:
Light is made up of wavelengths of light, and each wavelength is a particular colour. The colour we see is a result of which wavelengths are reflected back to our eyes. The visible spectrum showing the wavelengths of each of the component colours. The spectrum ranges from dark red at 700 nm to violet at 400 nm.The 'colour' of an object is the wavelengths of light that it reflects. This is determined by the arrangement of electrons in the atoms of that substance that will absorb and re-emit photons of particular energies according to complicated quantum laws.The reason that different waves of light appear to be different colors of light is because the color of a light wave depends on its wavelength. For example, the wavelength of blue light is about 450 nanometers, while the wavelength of red light is about 700 nanometers.
Explanation:
Answer:
Analog recordings copy the original sound.
Explanation:
Answer:
The concentration of 
is 1.48 × 
M
The absolute uncertainty of ![[{H^{+}]](https://tex.z-dn.net/?f=%5B%7BH%5E%7B%2B%7D%5D)
is ±0.12 × M
The concentration of is written as 1.48(±0.12) × M
Explanation:
The pH of a solution is given by the formula below
pH = ![-log_{10}[{H^{+}]](https://tex.z-dn.net/?f=-log_%7B10%7D%5B%7BH%5E%7B%2B%7D%5D)
∴ ![[H^{+}] = 10^{-pH}](https://tex.z-dn.net/?f=%5BH%5E%7B%2B%7D%5D%20%3D%2010%5E%7B-pH%7D)
where is the concentration
From the question,
pH = 8.83±0.04
That is,
pH =8.83 and the uncertainty is ±0.04
First, we will determine from
![[{H^{+}] = 10^{-8.83}](https://tex.z-dn.net/?f=%5B%7BH%5E%7B%2B%7D%5D%20%3D%2010%5E%7B-8.83%7D)
![[{H^{+}] = 1.4791](https://tex.z-dn.net/?f=%5B%7BH%5E%7B%2B%7D%5D%20%3D%201.4791)
× M
![[{H^{+}] = 1.48](https://tex.z-dn.net/?f=%5B%7BH%5E%7B%2B%7D%5D%20%3D%201.48)
× M
The concentration of is 1.48 × M
The uncertainty of ( ![U_{[H^{+}] }](https://tex.z-dn.net/?f=U_%7B%5BH%5E%7B%2B%7D%5D%20%7D)
) from the equation is
![U_{[H^{+}] } = 2.303 \\](https://tex.z-dn.net/?f=U_%7B%5BH%5E%7B%2B%7D%5D%20%7D%20%3D%202.303%20%5C%5C)
× ![{[H^{+}] }](https://tex.z-dn.net/?f=%7B%5BH%5E%7B%2B%7D%5D%20%7D)
× 
Where is the uncertainty of
is the uncertainty of the pH
Hence,
= 2.303 × 1.4791 × × 0.04
= 1.36 × 
M
= 0.12 × M
Hence, the absolute uncertainty of is ±0.12 × M
D. In a Chemical reaction, elements are not changed, just rearranged. Small amounts of energy take place.
