Answer: Option (b) is the correct answer.
Explanation:
Porosity means the ease with which a fluid can pass through between a rock or cracks etc.
If particles of a soil are flat and even if they are sorted then there will rarely be any space available for fluid or water to pass through it.
If soil particles are round in shape and are sorted then there will be space available for the fluid to pass through it. Hence, this type of soil will be most porous.
Similarly, if soil particles are round but are unsorted then there will be less space available as compared to sorted particles. This is because particles are placed randomly so, somewhere there will be much less space and somewhere there will be large space available. As a result, soil will not be most porous.
If soil particles are flat and unsorted then there will also be less space available for the fluid to pass through it. Thus, soil will be less porous.
Hence, we can conclude that out of the given options, soil B - round, sorted particles is the most porous.
Answer:
The energy gained by the metal equals the energy lost by the water.
<em>Explanation:
</em>
The metal is colder than the water, so heat energy will flow rom the water to the metal.
According to the <em>Law of Conservation of Energy</em>, energy cannot be destroyed or created.
If the metal gains a certain amount energy, the water must lose the same amount.
We <em>don’t know</em> what the final temperature of the water will be, because we don’t know the specific heat capacity of the metal. However, there is more water than metal and metals don’t have small heat capacities, so the temperature of the water won’t drop very much (maybe 1 °C).
So, the temperature increase of the metal will be much bigger than the temperature decrease of the water.
Certainly, the water will <em>not</em> warn up when the cold metal is added to it.
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