Question

a truck moving at 72 kmph carries a steel girder which rests on its wooden floor. what is the minimum time in which the truck can come to stop without the girder moving forward ? coefficient of static friction between steel and wood is 0.5.

Answer 1

electro negativity it is the relative capacity of an atom present in a molecule to attract the shared pair of electron towards itself
->across the period:-
*electronegativity and effective nuclear charge increases
*atomic size decreases
-> down the period:-
*electronegativity and effective nuclear charge decreases
*atomic size increases
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