Energy and Heat Review Flashcards
The ability to do work
Energy
A group of interacting elements that act according to a set of rules to form a unified whole
System
Energy is stored in bonds of CHEMICAL COMPOUNDS.
Chemical Energy
Physical energy resulting from ELECTROMAGNETIC RADIATION
Radiant Energy
Energy generated by the movement of ELECTRONS from one point to another
Electrical Energy
ENERGY from the temp of MATTER
Thermal Energy
The energy released during NUCLEAR FUSION or fission
Nuclear Energy
The energy which a body possesses by virtue of being in motion
Kinetic Energy
The energy possessed by a body by virtue of its position relative to others. Stored Energy.
Potential Energy
Energy due to compression and stretching
Elastic Potential Energy
Kinetic and Potential Energy
Mechanical Energy
Energy due to stored energy and chemical bonds between atoms
Chemical Potential Energy
The degree of hot or coldness in an object has thermal energy. Or the average KE of the particles that make up the object.
Temperature
Hear required to raise the temp of the unit (1kg) of the mass of a given substance by a given amount (1 degree)
Specific Heat
2 objects at different temps touch each other and energy directly transfers HOT TO COLD
Conduction
The movement caused within a fluid (currents) when hotter less dense material rises and colder denser material sinks.
Convection
The emission of energy as electromagnetic waves move
radiation
A substance or material that allows electricity and heat to flow through it
conductor
A substance that does not readily allow the passage of heat or sound.
insulator
the transfer of kinetic energy from one medium or object to another, or from an energy source to a medium or object.
Heat
What is the equation for KE? What is the equation for gravitational potential energy?
KE=1/2 m(velocity squared)
Label is Joules
GPE=mgh Label Joules
What is the law of conservation of energy?
Energy is neither created nor destroyed only transfered
Explain why we use copper and iron cooking pans. Relate your answer to heat transfer and to specific heat.
They are good heat conductors and they have a low specific heat so they heat up faster
What is the freezing and boiling point for the 3 temp scales?
F 32 212 C 0 100 K 273 373
Give and example of a good insulator and a good conductor.
Conductor copper insulator rubber wood plastic
List 2 scenarios when thermal energy transfer, or thermal insulation, is inhibited.
Shivering to keep your body warm
Insulation in a house
Putting on layers to keep you warm
Give a real-world example of heat transfer.
Stove to the pot, the stove’s heat is transferred into the room temp pot and this gets hot fast due to the extreme temp difference
Give an example of all 3 types of heat transfer.
Conduction stove to pot Convection air popper and radiation microwave
