Why can it be helpful to perform mathematical calculations using programming? Choose the best answer.
1 answer:
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Explanation:
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The answer assumes that the question is about which command help accomplish display directory contents in Unix-like operating systems.
Answer:
The command is <em>ls</em>.
Explanation:
The command <em>ls</em> (short for <em>list</em>) displays a variety of important information in different ways regarding any directory contents. Because of this, it is probably one of the most used commands in Unix-like operating systems.
Any directory can contain directories and files of different sizes, recently created/modified, attributes like permissions for being accessed, and, with this command, we can see all this information by size, chronologically, by owner, and/or by many more ways.
In the question, we can accomplish to list that the directory "a" contains its sub-directory "b" and no other entry using the next line of code:
Command-line 1: (<em>the command "says": display content of a</em>)
Result:
The result is only the directory <em>b </em>because there is no other entry in it.
To display more information regarding <em>b</em>, we can use the many options available for the command <em>ls</em>, like <em>-a</em> (all entries), <em>-d</em> (only directories), <em>-l</em> (long listing format), and so on, e.g. ls -a A (display all entries in directory A, included hidden files).
Answer:
El pilar no podrá soportar una masa de 10 toneladas
Explanation:
La dimensión del pilar de hormigón se da de la siguiente manera;
La longitud del lado, s = 30 cm = 0,3 m
La altura del pilar, h = 5 m
La densidad del pilar, ρ = 2,400 kg / m³
La resistencia a la compresión del pilar, σ = 500 kg / m²
El área de la sección transversal del pilar, A = s² = 0.3 m × 0.3 m = 0.09 m²
La masa del pilar, m = ρ × A × h = 2,400 × 0.09 × 5 = 1,080
La masa del pilar, m = 1.080 kg
Tenemos;
Dónde;
F = La carga aplicada
A = El área de la sección transversal
∴ F = A × σ
F = 0,09 m² × 500 kg / m² = 45 kg
Por tanto, la carga que el pilar puede soportar sin compresión = 45 kg <10 toneladas = 9.071,847 kg
El pilar no podrá soportar una masa de 10 toneladas.