The early kings ruled over only their own city-states. Lacking a centralized government and leader, the ancient region was prone to internal fighting among the kings for land and resources. As early as the 4th millennium BCE, ancient Mesopotamia covered the region that is now known as Iraq.

Explanation:

3 0

3 years ago

The line of longitude that runs through south Africa I called prime meridian true or false

never [62]

Answer:

True

Explanation:

The prime meridian is the line of 0° longitude, the starting point for measuring distance both east and west around the Earth. The prime meridian is arbitrary, meaning it could be chosen to be anywhere.

4 0

2 years ago

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 = $\frac{\textup{Mass}}{\textup{Volume}}$

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

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