You often hear it said that most of our energy ultimately comes from the sun. Trace each of the following energies back to the sun: (a) the kinetic energy of a jet plane; (b) the potential energy gained by a mountain climber, (c) the electrical energy used to run a computer; (d) the electrical energy from a hydroelectric plant.
Solution 13DQ We know that from conservation of energy laws , energy can neither be created nor be destroyed.The small amount of the sun’s energy is absorbed by the earth’s surface and it will reflects a majority of amount of energy back to sun.. Step 1: a) The fuel that uses by the jet engine is liquid oils that are taken from earth and are made from the fossils .We know the energy required for trees and plants are supplied by sun. so it's clear the energy is generated from the sun. Solar energy(sun)chemical energy stored in trees /plantschemical energy as fuel KE of jet plane Step 2: b) in case of a mountain climber the potential energy is from the food that he taken . the main source of the foods are vegetables and meat they are getting energy from the sun.so we can see the cycle of energy transaction from sun . solar energychemical energy stored in treespotential energy of climber