Answer:
Percolation of water through the soil.
Explanation:
When a tray containing a mixture of dough and sand is propped on one end of the tray with bricks then there is a slope from one end of the tray to the other end of the tray.
When water is poured on the higher end of the tray then the it tries to flow from the higher altitude to the lower altitude of the tray by the process of percolation through the granular spaces created due to the mixing of sand in the dough. Sand being granular in structure is easily permeable to water and passes water easily through its tiny pores.
Similar is the process of percolation of water through the layers of soil on the earth which also contains granular particles in them.
Answer:
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The answer is false..................
Answer:
a)801KJoules
b)The woman must climb stairs for an equivalent of 1.57km
Number of stairs=7850 stairs
Explanation:
a)We use the conversion between Joules and Kcal:
4184Joules=1Kcal
540Kcal*(1484Joules/1Kcal)=801KJoules
b)The physical Work must be equal to the food energy
![W_{physical}=E_{food}\\ mgh=E_{food}\\h=E_{food}/(mg)=801KJoules/(52Kg*9.81m/s^{2})=1.57Km\\](https://tex.z-dn.net/?f=W_%7Bphysical%7D%3DE_%7Bfood%7D%5C%5C%20mgh%3DE_%7Bfood%7D%5C%5Ch%3DE_%7Bfood%7D%2F%28mg%29%3D801KJoules%2F%2852Kg%2A9.81m%2Fs%5E%7B2%7D%29%3D1.57Km%5C%5C)
The woman must climb stairs for an equivalent of 1.57Km
For example if an stair measure 20cm=0.2m
Number of stairs=1.57km/0.2m=7850 stairs