The density of a floating body can be determined by tying weights to the body until both the body and the weights are completely submerged and then weighing them separately in air. consider a wood log that weighs 1400 n in air. if it takes 34 kg of lead (ρ = 11,300 kg/m3) to completely sink the log and the lead in water, determine the average density of the log. the average density of the log is 821.54 kg/m3.

chemical energy --> gravitational potential energy --> kinetic energy --> elastic potential energy --> gravitational potential energy

explanation:

when emma starts the hike, the chemical energy stored in her body is used to climb up the mountain, and so she gains gravitational potential energy (because at the end, she will be at a higher height h above the ground). then she goes bungee jumping: as she falls, this gravitational potential energy is converted into kinetic energy (because her speed increases as she falls down), until the point when the rope stretches, and she stops moving. at that moment, all the kinetic energy is converted into elastic potential energy due to the stretching of the rope. then, this energy is released because the rope returns to its natural length, and emma gains a small increase in altitude , so she gains some gravitational potential energy.