two cylinder wires of the same material have there length ratio of 9:4 what should be the ratio of their radil so that the restiant of the ratio is 4:1
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Q.5 Which soil has the largest water holding capacity? (1)
Q.6 Why should oils and fats be not released in the drain?
Explain. (2)
Q.7 (a) What is lateral inversion? (1)
(b)What is soil profile? Name the different horizons. (1)
Q.8 (a) What is sludge? Explain how it is treated. (2)
(b) What is reflection of light? (1)
Q.9 (a)Write the difference between concave and convex lens.
(2)
(b) What is cleaning of water? (1)
Q.10 (a)List the difference between clayey soil and sandy
soil. (2)
(b) What are the better housekeeping practices? (2)
(c)Sketch the cross section of soil and label the various
layers. (1)
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