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SpyIntel [72]
3 years ago
12

Solve each system of equation 8. –5x + y - 4z = 60 2x + 4y + 3z = -12 6x – 3y – 2z = -52

Geography
1 answer:
vfiekz [6]3 years ago
8 0

the answer its -4 i hope its helped you

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2. A 260 em cylinder container was used to collect an undisturbed soil sample. The container and soil weighed 403 g when dried.
sineoko [7]

Answer:

The Bulk density = 1.3 g/cm³

the porosity of the sample is 132 cm³

Explanation:

Given:

Volume of cylinder = 260 cm³

Mass of container and the soil = 403 g

Mass of the empty container = 65 g

Thus,

The mass of the soil is = 403 - 65 = 338 g  

Now,

The Bulk density = \frac{\textup{Mass}}{\textup{Volume}}

or

The Bulk density = \frac{\textup{338 g}}{\textup{260}}

or

The Bulk density = 1.3 g/cm³

also,

average particle density for mineral soil is usually given as 2.65 g/cm³

i.e the air present in the given soil sample has reduced its density from 2.65 g/cm³ to 1.3 g/cm³

The mass of the whole sample = Volume × Density

= 260 × 2.65

= 689 gm

but,

The actual mass of the dry sample = 338 g

thus,

Mass of air in the sample = 689 - 338 = 351 g

Therefore,

the volume of 351 g soil = \frac{\textup{mass defect of soil}}{\textup{density of soil}}

=  \frac{\textup{351}}{\textup{2.65}}

= 132.45 cm³

so the porosity of the sample is 132 cm³

4 0
4 years ago
Convert 1cm:100,ooo from<br>representative fraction to Statement scale<br>with its Units in km:​
Aleks04 [339]

1 cm to 1,00,000 cm. As 1 km represents 1,00,000 cm. That's why 1 cm to 1 km.

<u>Explanation:</u>

Scale represents the ratio between map distance and ground distance. Representative Fraction, Graphical scale, Linear scale and Comparative scale, Statement scale all are various categories of scale.

In Representative Fraction (R.F) values are represented in ratio format. Here, 1 cm map distance representing 1,00,000 cm ground distance. As 1 km= 1,00,000 cm. That's why 1 cm to 1 km means 1 cm map distance represents 1 km ground distance in reality.

Statement scale represents the values in a sentence. For eg. 1 cm to 1 km. Linear scale represents the values in primary and secondary divisions likewise Comparative scale compares two different units in a single scale.

3 0
3 years ago
The prefix homo- comes from a Greek word that means “the same or alike.” Predict the meaning of the prefix Hetero
PilotLPTM [1.2K]

Answer:

The prefix hetero- comes from the Greek word, héteros, and means "other, different". It is the exact opposite of the meaning of the prefix homo-.

5 0
3 years ago
A conflict is a struggle between |<br> forces in a story.
11Alexandr11 [23.1K]

Answer:

2 opposite forces

Explanation:

Conflict between two opposite forces idead or belief

for short

2 opposite forces

3 0
3 years ago
mixed-phase clouds over the southern ocean as observed from satellite and surface based lidar and radar
sesenic [268]

This is true that mixed-phase clouds over the southern ocean as observed from satellite and surface-based lidar and radar.

A three-phase colloidal system made up of water vapor, ice particles, and coexisting supercooled liquid droplets is represented as mixed-phase clouds. At all latitudes, from the arctic regions to the tropics, mixed-phase clouds are common in the troposphere. Due to their extensive nature, mixed-phase processes are crucial to the radiative energy balance on both a regional and global scale, precipitation generation, cloud electrification, and the life cycle of clouds.

But despite decades of theoretical research and observation, our knowledge and understanding of mixed-phase cloud dynamics are still lacking. The representation of mixed-phase clouds in numerical weather and climate models is famously challenging, and it is still challenging to describe them in theoretical cloud physics.

To know more about mixed-phase cloud refer to:  brainly.com/question/8050224

#SPJ4

4 0
2 years ago
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