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m_a_m_a [10]
3 years ago
12

Choose the scientific notation that best represents the standard notation given. 6,840,000,000 m 68.4 x 108 m 6.84 x 108 m 6.84

x 10-9 m 6.84 x 109 m
Physics
2 answers:
faust18 [17]3 years ago
8 0

ANSWER


6.84\times 10^9



EXPLANATION.


To write in scientific notation means , we write in form,


k\times 10^n


Where n is an integer and


1\le k\:


The given number is,


6,840,000,000


We move the decimal point backward to obtain our k, the n here is 9, because we moved backward 9 times.



This implies that,



6,840,000,000=6.84\times 10^9


The correct answer is D




PIT_PIT [208]3 years ago
4 0

Answer:

first question its D 6.84 x 10^9 m      Second is B 1.43 x 10^-10 g

Explanation:

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The temperature at which a purified substance's solid and liquid phases may coexist in equilibrium is referred to as the melting point. A solid's temperature goes up when heat is added to it until the melting point is achieved. The solid will then turn into a liquid with further heating without changing temperature. Additional heat will raise the temperature of the liquid once all of the solid has melted. It is possible to recognize pure compounds and elements by their distinctive melting temperature, which is a characteristic number.

The difference between freezing point and melting point:

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<em>Reference: Berry, R. Stephen. "When the melting and freezing points are not the same." Scientific American 263.2 (1990): 68-75.</em>

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