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3 years ago

Gretta has a sample of soil. She wants to know what its porosity is. How could she test the soil's porosity?

Physics

2 answers:

Gnoma [55]3 years ago

6 0

Answer: C. Measure the soil's volume and then the volume of water that the soil can absorb.

Soil porosity can be defined as the amount of pores or air spaces present inside the soil mass. These pores forms due to the movement of roots, earthworms and insects inside the soil. These pores helps in aeration of the soil and water retention. Both of these factors helps in the growth of the plants.

Porosity can be judged by the measuring the soil's volume and then the volume of water that the soil can absorb. The volume of water found in the soil will depend upon the amount of pores present in the soil hence, reflecting the porosity of the soil.

mel-nik [20]3 years ago

5 0

C. Measure the soil's volume and then the volume of water that the soil can absorb.

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How do you increase the amount of electrical energy produced from running water?

azamat

Answer:

To increase the volume of moving water, impoundments or dams are used to collect the water. An opening in the dam uses gravity to drop water down a pipe called a penstock. The moving water causes the turbine to spin, which causes magnets inside a generator to rotate and create electricity.

Explanation:

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8 0

3 years ago

Read 2 more answers

An object has density rho.

tatyana61 [14]

Answer:

a. the density will not change

b. D' = 0.125 D

So, the density will change by a factor of 0.125

Explanation:

Density is the material property and the value of density is constant for all solid materials. So, when the dimensions of the a solid are increased, while the material is same, then the material must be added to the object for increasing its dimensions. So, with the increase in the volume, the mass of the object also increases. And as a result the density of the object remains constant.

Since, here the material remains the same.

Therefore, the density will not change

Density = mass/Volume

D = m/V ------------ equation (1)

Now,

V = LWH ----------- equation (2)

Now, if each dimension increases by a factor of 2, the volume becomes:

V' = (2L)(2W)(2H)

V' = 8 LWH

using equation (2)

V' = 8 V

So, for constant mass, density becomes:

D' = m/V'

D' = m/8V

using equation (1)

D' = D/8

D' = 0.125 D

So, the density will change by a factor of 0.125

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3 years ago

A sound wave produced by a loudspeaker can travel through water, but not through a vacuum. In comparison, a red light wave produ

Anna [14]

Answer:

A. Light can travel trough air and space.

Explanation:

A vacuum is space that has no air inside of it. Since light is able to go through 'nothing' and matter, your answer must be A.

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FromTheMoon [43]

Answer:

Explanation:

Because that is when they're mind learns how to read

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Scorpion4ik [409]

Explanation:

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3 years ago