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Energy United Nations Sustainable Development You cannot access your DTE Energy account from the page you requested. Help create a cleaner tomorrow at no additional cost to your monthly bill. Energy refers to available power or motivation to move, as in Jada found that getting enough sleep each night gave her the energy to live each day. Examples of energy transformation include generating electric energy from heat energy via a steam turbine, or lifting an object against gravity using electrical energy driving a crane motor. Lifting against gravity performs mechanical work on the object and stores gravitational potential energy in the object. If the object falls to the ground, gravity does mechanical work on the object which transforms the potential energy in the gravitational field to the kinetic energy released as heat on impact with the ground. Our Sun transforms nuclear potential energy to other forms of energy; its total mass does not decrease due to that itself but its mass d