How much time takes to degrade the following?
Wood

How much time takes to degrade the following? Plastic bags

Amonkey of mass 15kg is climbing on a rope with one end fixed to the ceiling. If it wishes to go up with an acceleration of 1m//s^2 , how much force should it apply to the rope ? If the rope is 5m long and the monkey starts from rest, how much time will it take to reach the ceiling ?

The rate constant for a first order reaction is 60 s^(-1). How much time will it take to reduce the initial concentration of the reactant to its 1//6^(th) value ?

A stone is thrown vertically upwards with an initial velocity of 10ms^(-1) from the top of a cliff of height 40m.How much time it take to reach the ground?