Test 11/3 Flashcards
(38 cards)
What is work measured in?
Joules
What is force measured in?
Newtons
What is distance measured in?
Meters
Define energy
The ability to do work
Define work
Work is done when a force is applied to an object, moves that object
What is potential Energy?
Stored energy due to position of an object
What are two ways to determine Potential Energy?
Weight x Height or (w)(h)
OR
(Mass)(Acceleration due to gravity)(height) or (m)(g)(h)
What is weight?
The force of gravity on us and is NOT equal to mass
Does mass ever change?
NO, regardless of location (planet)
What is Kinetic Energy?
Energy that depends of motion/movement (mass/velocity)
How can you find Kinetic Energy?
(1/2)(mass)(velocity^2)
What is mechanical energy?
the sum of PE and KE
What is the Law of Conservation of Energy?
Energy is neither created nor destroyed, only changed or transferred.
What does Endothermic mean?
Heat is absorbed, feels cold to us
What does Exothermic mean?
heat is released, feels hot to us
What is temperature?
Average Kinetic Energy of the particles
What is thermal energy?
Total Kinetic and Potential Energy of the particles
What is heat?
Thermal Energy in motion
Which has higher thermal energy?
Hot cup of coffee or an iceberg?
Iceberg
Which has higher temperature?
Hot cup of coffee or an iceberg?
Cup of coffee
In what direction does heat always move?
To colder areas
What is thermal expansion?
When the volume of a substance changes due to a change in thermal energy
What are insulators?
Anything that is able to slow the movement of thermal energy
What is a conductor?
Anything that allows Thermal Energy to flow through it easily
