Imagine a 0.1-kg apple attached to a branch of a tree 2 m above a spring on the ground below. The apple falls and hits the spring, compressing it 0.1 m from its rest position. Now imagine if the compression is 0.36 cm. Is this spring stiffer or less stiff than the first spring?

An object with initial temperature 130 ∘ f is submerged in large tank of water whose temperature is 50 ∘ f . find a formula for f ( t ) , the temperature of the object after t minutes, if the cooling constant is k = − 0.2 . remember newton's law of cooling (the rate of change of temperature with respect to time is equal to k times the difference between the temperature of the object and the surrounding temperature) ! : )