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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it can be observed without changing the identity of the object.

it depends on what substance you're talking about as well as many other factors. in quantum mechanics, the observation of particles affects the observers ability to measure certain properties. for example: you can know the velocity of a particle, but you can't know it's position; or you can know it's position, but not it's velocity. it's like trying to find out where a grain of sand is by throwing other grains of sand at it. once you find out where it is, it's been moved. it's also like trying to find an answer to the question of whether or not a tree falling in a forest makes a sound if nobody is there to hear it. paradoxically, the only way to find out is to be there and hear it.