energy types Flashcards
What type of energy do all moving objects have?
Kinetic energy
The law of conservation of energy states what three things
that can happen to energy
Transferred usefully, stored or dissipated
Which word means ‘wasted into the surroundings’?
Dissipated
When energy is wasted, it is usually which energy types?
Thermal and sound
The law of conservation of energy states that which two
things cannot happen to energy?
Created or destroyed
What can be done to moving parts in a system to reduce
heat loss by friction?
Lubrication (adding oil/grease)
What name is given to a material which does not conduct
thermal energy well?
Thermal insulator
What name is given to a material which allows thermal
energy to pass through it easily?
Thermal conductor
What is the unit for energy?
Joules (J)
What type of heat transfer travels through solids?
Conduction
What type of heat transfer happens only in fluids (gas and
liquids)?
Convection
Which is the only type of thermal energy transfer can occur
in a vacuum?
Radiation
Which dissipates less thermal energy? Thin walls or thick
walls?
Thick
Which dissipates less thermal energy? Walls with large or
small area
Small
