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3 years ago

Help me with this _XX

Biology

1 answer:

expeople1 [14]3 years ago

5 0

Answer:

B. Hardness

Explanation:

Physical properties of a substance is defined as the properties which can be observed or measured without changing the composition of matter.

Physical properties include odor, appearance, color, texture, boiling point, melting point and many others.

Hardness is a physical property of a substance as it describes the resistance of substance to deformation and can be observed by simple touch or without changing the composition of matter.

While reactivity, toxicity and flammability are chemical properties of substances that change one type of matter into another type.

Hence, the correct option is B.

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Answer:

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And also, after every time interval n, the number of bacteria has tripled.

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And when n=2,

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$1,350,000=(50,000)3^n$

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$n=3$

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