It is more difficult to walk on a sandy road than on a co...
It is more difficult to walk on a sandy road than on a concrete road because
sand is soft and concrete is hard
the friction between sand and feet is less than that between concrete and feet
the friction between sand and feet is more than that between concrete and feet
the sand is grainy but concrete is smooth
Correct answer is B
No explanation has been provided for this answer.
Arrange the following in the order of their increasing frequency. I. Visible light II. Gamma ra...
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