Types of Energy
______ is stored energy
Potential
Open system ______
* exchange with environment surroundings
* varies with time
* boundaries not closed
Conduction is __________
The heat energy is transferred directly through contact.
To make water boil faster, salt is added to it. Why?
Salt has a lower heat capacity unlike water so it helps the water lower the specific heat capacity to boil faster.
_______ is moving energy
Kinetic
Closed system ______
* Mass is constant
* Boundaries closed
* Cannot exchange matter
Convection is ______
The heat energy is being transferred by the motion of molecules going up then down in a circular motion.
gas
The particles are far apart
What do both potential and kinetic energy have in common?
* made up of particles
* unit is joules
* mass
Open and Closed systems are the same in what ways?
* It's an exchange with it's surroundings.
Radiation is _______
goes outward, the heat energy is transferred by electromagnetics.
liquid
The particles are not too far apart but not super close.
Which types of energy go into the Potential energy category?
Thermal, Chemical, Nuclear
Law of Conservation of Energy (LoCoE)
Energy cannot be created nor destroyed, only transferred.
The _____ the air, the ______ the particles will move.
Warmer; faster or Colder; slower
Solid
The particles are very close together.
What types of energy go into the kinetic energy category?
Electromagnetic, Sound, Thermal, Electrical
How does energy transformations still follow LoCoE?
Because they are only being transferred not created nor destroyed.
What are the equations for solving for kinetic and potential energy? And what is the force of gravity?
KE=.5mv^2
PE=mgh
Gravity=9.8m/s^2
Which heats up faster, sand (.84) or Sea water (3.9)?
Sand because the lower the number, the faster it will heat up.