Answer:
A. To study the chemical composition of the surface of a planet
Explanation:
Strictly speaking, a spectrometer is any instrument used to view and analyze a range (or a spectrum) of a given characteristic for a substance (for example, a range of mass-to-charge values as in mass spectrometry), or a range of wavelengths as in absorption spectrometry like nuclear magnetic radiation spectroscopy
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C. 14 protons and 14 electrons
The answer is B NaCI solid
Answer:
here
Explanation:
FRICTION ADVANTAGES:
a) the soles of are shoes are designed in a way that they create friction and prevent us from slipping and falling.
b) We are capable of writing with a pen due to the friction between the pen and the paper.
FRICTION DISADVANTAGES:
b) Forest fires are caused due to the friction between the trees branches
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