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2 years ago

Which step is part of a scientific investigation?

1 answer:

3 0

Steps of a scientific investigation include identifying a research question or problem, forming a hypothesis, gathering evidence, analyzing evidence, deciding whether the evidence supports the hypothesis, drawing conclusions, and communicating the results.

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Drinking energy drinks makes people more aggressive.

ch4aika [34]

Outcome (dependent) variable-drinking energy drinks

Test (independent) variable- more aggressive

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2 years ago

Which is the chemical formula for zinc phosphate

Orlov [11]

The Chemical fomulla for Zinc Phosphate

Zn3(PO4)2

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3 years ago

Which of the following statements is true?

vaieri [72.5K]

I think D?? I apologize if not-check in other answers to be sure ^^

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3 years ago

Read 2 more answers

The cylinder of aluminum in class was approximately 13mm in circumference and 42mm in length. What would be it's approximate mas

Roman55 [17]

Answer:

Mass, m = 1.51 grams

Explanation:

It is given that,

The circumference of Aluminium cylinder, C = 13 mm = 1.3 cm

Length of the cylinder, h = 4.2 cm

We know that the density of the Aluminium is 2.7 g/cm³

Circumference, C = 2πr

$r=\dfrac{C}{2\pi}\\\\r=\dfrac{1.3}{2\pi}\\\\r=0.206\ cm$

Density is equal to mass per unit volume.

$d=\dfrac{m}{V}$

m is mass of the cylinder

V is the volume of the cylinder

$V=\pi r^2h\\\\V=\dfrac{22}{7}\times0.206^2\times 4.2\\\\V=0.5601\ cm^3$

So,

$m=d\times V\\\\m=2.7\times 0.5601\\\\m=1.51\ g$

So, the mass of the cylinder is 1.51 grams.

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3 years ago

The backbone in a nucleic acids strand is called:

Nina [5.8K]

Answer: Option (c) is the correct answer.

Explanation:

Backbone in a nucleic acids strand is made up of sugar molecules attached with phosphodiester bond.

This sugar-phosphate linkage helps in joining of nucleotides in a DNA sequence. Due to this backbone structural framework of nucleotides is formed. In DNA, the sugar is deoxyribose.

Thus, we can conclude that the backbone in a nucleic acids strand is called sugar backbone.

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3 years ago