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4 years ago

How do you find surface area (just the basis)?

1 answer:

6 0

To find surface area of 3D objects, you have to know the area formulas for basic shapes. For example, the area of a circle is $\pi r^{2}$ and the area of a rectangle is length times width. To find surface area of a cylinder, you will need to know both of those formulas, since the 3D shape involves both circles and rectangles.

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.Un recipiente cilíndrico de 5cm de radio y 10cm de altura se llena de agua. Si la masa del recipiente lleno es de 2kg, ¿cuál es

Lera25 [3.4K]

Answer:

La masa del recipiente vacío es 1,2146 kg.

Step-by-step explanation:

La densidad se define como la propiedad que tiene la materia, ya sean sólidos, líquidos o gases, para comprimirse en un espacio determinado. En otras palabras, la densidad es una magnitud que permite medir la cantidad de masa que hay en determinado volumen de una sustancia. Entonces, la expresión para el cálculo de la densidad es el cociente entre la masa de un cuerpo y el volumen que ocupa:

$densidad= \frac{masa}{volumen}$

Entonces la masa puede ser expresada como:

masa= densidad*volumen

En este caso:

densidad del agua= 1000 $\frac{kg}{m^{3} }$
volumen del recipiente cilíndrico= π*radio²*altura= π*(5 cm)²* 10 cm= π*(0,05 m)²*0,1 m= 7,854*10⁻⁴ m³

Reemplazando:

masa= 1000 $\frac{kg}{m^{3} }$ * 7,854*10⁻⁴ m³

masa=0.7854 kg

Si la masa del recipiente lleno es de 2 kg, entonces se le resta la masa de agua calculada:

2 kg - 0,7854 kg= 1,2146 kg

Entonces, la masa del recipiente vacío es 1,2146 kg.

8 0

3 years ago

Can somewon help me plzzzzz if u get it right i will mark brainlest

Fantom [35]

Answer: 4

Step-by-step explanation:

Because the equation says at least 45, we know the sign is $\leq$ . Because she has already run 6 rounds, the equation must have + 6.

Hope it helps <3

6 0

3 years ago

HELP ME PLEASE

kotykmax [81]

ac8×b²

Step-by-step explanation:

I need help too 12+12=24 12 ×2=24

6 0

3 years ago

Create the Subset and Proper Subset of the set A= {1,2,3,4}. Upload your work.

kozerog [31]

The subset of A is B = {1, 2} and the proper subset of A is C = {1,2,3,4}

<h3>How to create the Subset and Proper Subset of the set?</h3>

The set is given as:

A = {1,2,3,4}

Subsets of a set are sets that can be found in another set

An instance of this is

B = {1, 2}

Because all the elements of set B are in set A

Proper subsets of a set are sets that contain the exact elements found in another set

An instance of this is

C = {1,2,3,4}

Because set C and set A have the same elements