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4 years ago

A nation’s buildings, roads, bridges, power grids, etc.

SAT

1 answer:

Sedbober [7]4 years ago

6 0

Answer:

<em>A. Infrastructure.</em>

Explanation:

The buildings, roads, bridges and so on are part of a country's infrastructure, the set of (public or not) facilities that allow for the function of its living conditions and economy. For example, bridges are built so transportation may be made through ways that were previously unavailable for any or most kind of transport to go through, being made by a company (state's or private) with the intention of providing better access from and to different areas.

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3 years ago

a scientist heats 30 grams of calcium carbonate (caco3) in the chemical reaction shown. what is the total mass of the products?

masya89 [10]

The question is incomplete, the complete question is;

Use the chemical reaction to answer the question. CaCO3 → CO2 + CaO A scientist heats 30 grams of calcium carbonate (CaCO3) in the chemical reaction shown. What is the total mass of the products?

A. 10 grams B. 15 grams C. 30 grams D. 60 grams

When a scientist heats 30 grams of calcium carbonate (CaCO3) in the chemical reaction, the total mass of the products is 30 grams.

According to the law of conservation of mass, mass is neither created nor destroyed in a chemical reaction.

The simple interpretation of this law is that the total mass of reactants should necessarily be the same as the total mass of products obtained in the reaction.

We had 30grams of Calcium Carbonate (CaCO3) reacting hence we must have a total mass of 30 grams of CaO and CO2 obtained after reaction.

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3 years ago

Which of the following best describes a characteristic of that makes it useful as hereditary material?.

m_a_m_a [10]

The first choice

Explanation

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2 years ago

Collecting research data is the final step in the scientific method. Please select the best answer from the choices provided T F

wel

The scientific method is a series of sequential steps used to build scientific knowledge. In the scientific method, the collection of data is a previous step before making conclusions from these data.

The statement 'Collecting research data is the final step in the scientific method' is FALSE.

The steps of the scientific method include:

to make one particular observation of some aspect of the natural world in order to formulate one question from such observation
to propose a possible explanation (hypothesis) in order to explain this question
to test the hypothesis by collecting experimental and/or observational data
to examine the collected data in order to accept or reject the working hypothesis
to make a conclusion from the results

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brainly.com/question/17216882?referrer=searchResults

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3 years ago

A thrifty shopper wants to purchase a new phone that is made with quality parts. What factors should they consider?.

Naddik [55]

The factor that the thrifty shopper should consider is; High quality phones contain rare earth metals that are a more scarce resource and cost more to the consumer.

<h3>Choice of earth metals</h3>

We are told that the thrifty shopper wants to purchase a new phone that is made with quality parts.

Now, when trying to buy a new phone, one needs to ensure that they are high quality phones made by rare earth metals because these metals have wide range of applications in electrical and electronic components.

Read more on choice of metals at; brainly.com/question/25943225

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3 years ago