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Unit - 6 (How do we make life easier) - Coggle Diagram
Unit - 6 (How do we make life easier)
Conceptual
How is energy harnessed to do work? Energy is harnessed to do work by converting mechanical energy to electrical energy through turbines, motors and hydroelectricity dams.
How does energy interact with matter? Energy can be transferred causing movement, or by being absorbed, reflected, or transmitted as electromagnetic waves like light.
What is energy? Energy is the capacity to do work
How is energy transformation controlled?
How much of the energy can be useful to do useful work? The amount of energy that can be useful is the useful energy output divided by the total energy input, expressed as a percentage, a value known as efficiency.
Factual
What are examples of energy
Types of energy
Kinetic
Potential
Nuclear
Magnetic
Thermal
Mechanical energy
Chemical energy
What is temperature? Temperature is a objective measure of the hotness or coldness of a body or environment
How can we measure the work done? To measure work done we can multiply force by distance
How does heat energy transfer? Heat can be transferred through conduction, convection and radiation. Conduction is the process where heat is transferred through a solid particle. Convection is the process where the fluid or gas particles circulate throughout the container, evenly spreading the heat. Whereas radiation is the process where the heat is being transferred through rays such as gamma, infrared, ultraviolet, etc.
How can we measure the efficiency of machines?
We can measure the efficiency of machines by dividing the total energy with the useful energy and multiplying it with a 100% to get a proper percentage value.
Debatable
Do the machines we make always change things for the better? Machines can increase productivity and efficiency, improve communication and lead to economic growth. However if over relied on they can prevent the development of human skills
Will energy ever run out?