In a waterfall, much of the energy of the falling water is converted into heat.
If all the mechanical energy is converted into heat that stays in the water, how
much of a rise in temperature occurs in a 100 m waterfall? For water,
c= 4.186 x 103 J/(kg . Cº).

Suppose a force of 60 n is required to stretch and hold a spring 0.1 m from its equilibrium position. a. assuming the spring obeys hooke's law, find the spring constant k. b. how much work is required to compress the spring 0.5 m from its equilibrium position? c. how much work is required to stretch the spring 0.6 m from its equilibrium position? d. how much additional work is required to stretch the spring 0.1 m if it has already been stretched 0.1 m from its equilibrium? a. kequals 600