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Lapatulllka [165]
2 years ago
11

A block of metal with volume 15 m3 and density 8,800 kg/m3 is combined with another metal of mass 850 kg and volume 6.2 m3 to fo

rm an alloy.
What is the density of the alloy to the nearest integer?
Mathematics
2 answers:
boyakko [2]2 years ago
4 0

Answer:

El aluminio es un metal ligero con una densidad de 2.70 g/cm3, y por ello, aunque las aleaciones de aluminio tienen características mecánicas relativamente bajas comparadas con las del acero, su relación resistencia-peso es excelente. Es precisamente debido a esto que el aluminio se utiliza cuando el peso es un factor importante, como ocurre en las aplicaciones aeronáuticas y de automoción.

 

Tabla 13.8. Propiedades mecánicas y aplicaciones de algunas aleaciones comerciales de aluminio.

El aluminio también responde fácilmente a los diferentes mecanismos de endurecimiento, tal como se recoge en la tabla 13.8, donde se observa que el mecanismo más notable es el de endurecimiento por precipitación, donde se consigue una dureza hasta 30 veces superior a la del aluminio puro.

Por otra parte, el aluminio no suele presentar un límite de resistencia a la fatiga bien definido, de modo que la fractura puede suceder incluso a niveles muy bajos. Debido a su bajo punto de fusión, el aluminio no se comporta bien a temperaturas elevadas. Finalmente, las aleaciones de aluminio tienen escasa dureza, lo que origina poca resistencia al desgaste abrasivo en ocasiones.

-BARSIC- [3]2 years ago
3 0

Answer:

Aluminum is a light metal with a density of 2.70 g / cm3, and therefore, although aluminum alloys have relatively low mechanical characteristics compared to steel, their strength-to-weight ratio is excellent. It is precisely because of this that aluminum is used when weight is an important factor, as in aeronautical and automotive applications.

 

Table 13.8. Mechanical properties and applications of some commercial aluminum alloys.

Aluminum also responds easily to the different hardening mechanisms, as shown in table 13.8, where it is observed that the most notable mechanism is that of hardening by precipitation, where a hardness of up to 30 times higher than that of pure aluminum is achieved. .

On the other hand, aluminum does not usually have a well-defined limit of resistance to fatigue, so that fracture can occur even at very low levels. Due to its low melting point, aluminum does not perform well at elevated temperatures. Finally, aluminum alloys have low hardness, resulting in poor resistance to abrasive wear at times.

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How do i solve 1+1=0
tia_tia [17]

Answer:

Logically that's not possible but if you want to prove it then, you have to use a trick.

Step-by-step explanation:

1 + 1 = 1 + \sqrt{1}

        = 1 + \sqrt{(-1) * (-1)}  

        = 1 + \sqrt{(-1)} * \sqrt{(-1)}

        = 1 + \sqrt{i^2} * \sqrt{i^2}

        = 1 + i * i  

        = 1 + i^2

        = 1 + (-1)

        = 1 - 1

        = 0

So, 1 + 1 = 0

Hope this will help. Please give me brainliest.

7 0
3 years ago
Construct a circle of any radius, and draw a chord on it. Then construct the radius of the circle that bisects the chord. Measur
Nady [450]

Answer:

Part A: See the image attached. The angle between the radius and the chord will always be 90 degree if the radius is perpendicular to the chord

Part B: There are many ways to prove this and here is mine

Prove OC is perpendicular to AB

We know that ΔAEC≅AED by SSS criteria (SSS criteria is when all three sides of a triangle is equal making them congruent)

to prove this that they apply to the SSS criteria:

m∠ADO=m∠BDO

m∠ADO=90°=m∠BDO

Part C: See the image attached. A radius is perpendicular to a chord when the chord is equally divided in half by the radius.

Part D: There are many ways to prove this and here is mine

Prove OC is perpendicular to AB

AO=BO because AO and BO are both radii

OD≅OD by reflexive theorem

ΔADO≅ΔBDO because they are both right triangle with the hypotenuse and a side

AB≅BC means that OC is perpendicular to AB

If you are still confused then I recommend watching these vdos by khan academy about proving perpendicular radius bisector: https://youtu.be/2NgzruZ4_5c

https://youtu.be/TgDk06Qayxw

Hope this helped bye:)

4 0
3 years ago
Enter a recursive rule for the geometric sequence.
Jlenok [28]

Answer:

x_{n} = 5 \ * \ (-2)^{n-1}

Step-by-step explanation:

Given the geometric sequence:

5, −10, 20, −40, ...

The first term is a = 5  

And the common ratio = r = -10/5 = -2

The general rule of geometric sequence is

x_{n} = a \ * \ r^{n-1}

So, the rule for the given geometric sequence is:

x_{n} = 5 \ * \ (-2)^{n-1}

8 0
3 years ago
In 2007, Linda purchased a house for $120,000. In 2017, the house was worth $245,000. Find the average annual rate of change in
Sergeu [11.5K]

Answer:

12500 dollars/year

Step-by-step explanation:

A linear equation i in the form y = mx + b, where y is a dependent variable, x is an independent variable, m is the rate of change and b is the initial value of y (i.e. x = 0).

Let x represent the year and y represent the cost of the house. Given that x = 0 represent 2000, hence we can represent the problem in the form (x, y) as:

(7, 120000) and (17, 245000). The annual rate of change is gotten using:

m=\frac{y_2-y_1}{x_2-x_1} \\\\m=\frac{245000-120000}{17-7} \\\\m=12500\\\\m=125000\ dollars\ per \ year

7 0
3 years ago
Lola goes hiking every 10 days and swimming every 4 days. She did both kinds of exercise today. How many days from now will she
melisa1 [442]

Answer:

20 days

Step-by-step explanation:

The next common number is 20

8 0
3 years ago
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