1.1.A cylindrical soil core had a height of 40 mm and a diameter of 90 mm. The wet mass of the soil was 600 g. After oven drying the soil mass was 500 g. Given that the density of water = 1000 kg m-3 and soil particle density = 2 650 kg m-3. Calculate the following: i. Mass wetness [2]

ii. Porosity [2]

iii. Volume wetness [2]

iv. Void ratio [2]

v. Degree of saturation [2]

2.Comment on the suitability of the soil in 4b above for plant growth. [5]

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explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.  

it is b that is the answer.

answermeridional ;