Answer:
The objective of a properly proportioned concrete mix are:
- To produce the combination of cementitious material, water, and aggregate that meets the requirements of a particular structure, portion of a structure, or series of structures at least cost.
- To produce concrete of the specified properties.
- To produce a satisfactory of end product, such as beam, column or slab as economically as possible.
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Answer:
6 m²
Explanation:
application of fluid pressure according to Pascal's principle for the two pistons is given as:

Where P₁ is the pressure at the input and P₂ is the pressure at the output.
But P₁ = F₁ / A₁ and P₂ = F₂ / A₂
Where F₁ and F₂ are the forces applied at the input and output respectively and A₁ and A₂ are the area of the input pipe and output pipe respectively
Since, 

But A₁ = 0.2 m², F₁ = 250 N, F₂ = 7500 N. Substituting values to get:

Therefore, the area of the pipe below the load is 6 m²
Answer:

Explanation:
Hello,
In this problem, the piston-cylinder assembly make us state the energy balance as:

Thus, we must now compute
in terms of Cv as follows:

Now, since heat is given off, its sign is negative, thus, the work is computed as:

This work means that work was done over the system in order to allow the compression.
The suppositions were:
- The change in the internal energy is a function of the temperature.
- Air is an ideal gas.
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Answer:Animation can occur before an action. Prepares the audience for the action. ... A pose or action should clearly communicate to the audience the attitude, mood, reaction or idea of the character. The effective use of long, medium or close up shots, as well as camera angles helps tell the story.
Explanation:May i have brainlist plz only if u wanna give me brainlist though have an nice day and stay safe.