P1 Overall Flashcards
Name the eight energy stores.
Kinetic, gravitational potential, elastic potential, thermal, chemical, nuclear, magnetic, electrostatic
These energy stores represent different forms in which energy can exist.
Name the four ways in which energy can be transferred.
Heating, waves, electric current, mechanically
These methods describe how energy moves from one place to another.
What is a system?
An object or group of objects
Systems can be analyzed to understand energy transfers.
What is a closed system?
A system where no energy can be transferred to or from the surroundings
In a closed system, the total energy remains constant.
What is work done?
Energy transferred when a force moves an object
Work is calculated as the product of force and distance moved in the direction of the force.
What is the unit for energy?
Joule (J)
The joule is the standard unit of energy in the International System of Units (SI).
What is one joule of work?
The work done when a force of 1 N causes an object to move 1 m in the direction of the force
This definition establishes a clear relationship between force, distance, and work.
What does a material’s thermal conductivity tell you?
how well it conducts heat
Which materials have low thermal conductivity
thermal insulators
Three factors that determine the rate of thermal energy transfer through a material
thermal conductivity of material, temperature difference and the thickness of the material
What factors effect the rate of heat loss from a building
the thickness of walls and roof
thermal conductivity of walls and roof
the temp difference between the two sides of the wall/roof.
