The speed of the man and the chair after the book is thrown is 0.2 m/s.
The given parameters:
- <em>mass of the book, m₁ = 2.1 kg</em>
- <em>speed of the book, u₁ = 7.2 m/s</em>
- <em>mass of the man, M = 70 kg</em>
- <em>mass of the book, m = 9.2 kg</em>
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The total mass of the man and the book is calculated as follows;
m₂ = 70 kg + 9.2 kg
m₂ = 79.2 kg
The speed of the man and the chair after the book is thrown is determined by applying the principle of conservation of linear momentum;
Thus, the speed of the man and the chair after the book is thrown is 0.2 m/s.
Learn more about conservation of linear momentum here: brainly.com/question/7538238
Answer:
Negative charge
Explanation:
Electron is an negative charge that spins around the nucleus.
Water, Juice, Tears, Sweat
According to the visible spectrum, we can deduce the following:
- Objects that absorb shorter wavelengths of light are perceived as <u>red</u>.
- Objects that absorb longer wavelengths are perceived as <u>blue</u>.
- Objects that reflect all wavelengths are perceived as <u>white</u>.
- Objects that absorb all wavelengths are perceived as <u>black</u>.
<h3>What is light?</h3>
Light can be defined as a form of electromagnetic waves (radiation) that do not require any medium for its propagation. Thus, light is generally referred to as a visual signal because it can be seen with the eyes.
<h3>The wavelength of light.</h3>
Based on scientific records, the wavelengths of light that can be seen by humans with their eyes is between the range of 400 to 750 nanometers (nm).
According to the visible spectrum, we can deduce the following:
- Objects that absorb shorter wavelengths of light are perceived as <u>red</u>.
- Objects that absorb longer wavelengths are perceived as <u>blue</u>.
- Objects that reflect all wavelengths are perceived as <u>white</u>.
- Objects that absorb all wavelengths are perceived as <u>black</u>.
Read more on wavelength here: brainly.com/question/25699025
