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Dmitrij [34]
2 years ago
11

Who invented Napiers bone and when ​

Biology
2 answers:
pogonyaev2 years ago
6 0

Answer:

John Napier (1550-1617), matemático escocés, inventó dos ábacos multiplicativos que se conocen con los nombres de "huesos de Napier" y "promptuario" respectivamente. Se dieron a conocer en el año 1617 y suponen una aportación fundamental en la historia del desarrollo de los aparatos de cálculo.

Explanation:

Oliga [24]2 years ago
3 0

Answer:

Explanation:

John Napier a Scottish mathematician invented a calculating device in 1614.

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What are the benefits of scientists using the metric system worldwide?
Basile [38]

Answer;

-Reduce the chance of errors in correspondence

-Easier to use for converting between units while measuring

-Make communication easier between scientists comparing data

Explanation;

-The metric system is a system that is based on joining one of a series of prefixes, including kilo-, hecto-, deka-, deci-, centi-, and milli-, with a base unit of measurement, such as meter, liter, or gram.

-Since the metric system is a decimal system of weights and measures it is easy to convert between units simply by multiplying or dividing by 10, 100, 1000, etc.

-It is an alternative system of measurement used in most countries, as well as in the United States.

4 0
3 years ago
Read 2 more answers
If a molecule of DNA has 30% Adenine how much of the other bases will be present?
anygoal [31]

Answer:

If a DNA molecule has 30% Adenine the percentage of the other bases is Thymine: 30% Cytosine: 20% Guanine: 20%.

Explanation:

When the percentage that a base has in a DNA molecule is given, the percentage of the other bases can be known using the Chargaff's base pair rule.

A DNA molecule has the information of the genome of a living being, according to a specific sequence of its nitrogenous bases adenine, guanine, cytosine and thymine.

Chargaff was able to establish that in a DNA molecule the ratio of purine : pyrimidine of 1:1, so there must be the same amount of thymine as adenine and a similar amount of guanine for the cytosine, taking into account the complementarity of bases.

Taking into account the law of the base pair, if in a DNA chain there is 30% of Adenine, in the molecule there is:

  • <em>Adenine 30%. </em>
  • <em>Thymine 30%. </em>
  • <em>Cytosine 20%. </em>
  • <em>Guanine 20%. </em>
  • <em>Total ..... 100% </em>

In this case, the <u>Chargaff rule is useful to determine the percentage of nitrogenous bases that exist in a DNA molecule, knowing the percentage of a single base</u>.

7 0
2 years ago
America in the 1920s
trapecia [35]

Answer:

The Eighteenth Amendment empowered Congress to enforce the Amendment through legislation;

Explanation:

The Eighteenth Amendment empowered Congress to enforce the Amendment through legislation;

5 0
3 years ago
As humans grow, their bodies change.” Which statement best explains how humans grow?
Nata [24]

Answer: Cells undergo cell division

Explanation:

"As humans grow, their bodies change.” The statement that best explains how humans grow is that cells undergo cell division.

When cells divide, thus brings about the making of new cells. This is referred to as cell division or cell reproduction. In this case, a single cell divides and then brings about two cells, then these two cells later make four cells .... This is unique and vital for every living organisms.

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2 years ago
The 1974 Congressional Safe Drinking Water Act?
S_A_V [24]

To ensure that the drinking

water for the public is safe, the Safe Drinking Water Act (SDWA) is

promulgated. The EPA is required to set standards for drinking water quality

and oversee all states in the area are implementing these standards.



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3 years ago
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