Types of Energy
When a rubber band gets stretched out and held what kind of energy does it have?
elastic potential energy
What two factors have an exponential relationship?
kinetic energy and speed
Would these to atoms attract or repel?
atom 1: 3 protons, 3 neutrons, 2 electrons
atom 2: 5 protons, 6 neutrons, 3 electrons
repel- they are both positive
How can you increase the amount of kinetic energy an object has?
Increase the speed or the mass
The sun heating earths surface is an example of what type of heat transfer
Radiation
What creates thermal energy?
What happens to the amount of Kinetic energy in an object as it cools down?
KE decreases
How does an atom become positively charged?
How does an atom become negatively charged?
Positive- losing electrons
Negative- gaining electrons
When is the kinetic energy the greatest on a roller coaster?
At the fastest speed
Thermal energy flows from _____ to ______
warm to cold
What kind of relationship does kinetic energy have with mass?
As mass increases KE increase, linear relationship
Which of the following is not a type of potential energy?
Gravitational, Elastic, Chemical, Thermal
Thermal
Name the three subatomic particles, identify their charge and where they are found in the atom
protons- positive charge in the nucleus
neutron- neutral charge in the nucleus
electrons- negative charge around the outside
How can a roller coaster gain potential energy?
Go higher
The top of the pool water is warmer because of
convection
When you use a hair dryer what kind of heat transfer is occuring?
radiation
Steel is an insulator- what does this mean?
It hold/ retains heat well
What kind of forces attract and repel each other?
similar repel
opposites attract
A hair dryer transforms _______energy to _____ & ________
electrical to sound and heat
Touching a hot stove is an example of what type of heat transfer?
Conduction
Explain what chemical potential energy is
Energy stored in bonds between atoms
What happens to the potential and kinetic energy as a ball rolls down a ramp?
Potential energy is changed to kinetic energy
PE decreased KE increased
explain what two factors determine how strong a static electric interaction will be.
Magnitude- how charged the objects are
Distance- the space between the two objects
When a plant takes sunlight and makes food, what kind of energy transformation is happening?
from light energy to chemical energy
Hot air rising and cool air sinking is an example of what type of heat transfer
convection