1001 Space Earth Nature History Human World Science and Technology Chemistry Materials Force and Energy Heat and Light Electricity and Magnetism Industry Machines Electronics and Computers Cars and Trucks Railways Ships Aircraft Fishing and Agriculture Undersea Exploration

Choose a Page:What is energy?What is a force?Why is the Sun's energy so important?Why are forces important in sports?What is friction?How is sound energy measured?What is nuclear energy?Which forces act on a jet aircraft?What is gravity?*Can one form of energy be changed ...*How are force and energy measured?What is the difference between mas...How does a turbine work? Can one form of energy be changed into another? All forms of energy can be changed into other forms, but the total amount of energy remains the same. Sound energy turns into electrical energy and back again when we use the telephone. Sound energy turns into electrical energy when we use the telephone   Previous: Back Book: 1001 Section: Science and Technology Chapter: Force and Energy