Movement
The primary transfer of energy is called: ________________.
Work
Energy is classified by:
How it’s sensed or its principle source
_________________ position is the distance measured below the object, ground, or some other horizontal surface.
The principle source of thermal energy is:
The sun and earth
Energy is measured in:
Joules
___________________ is defined as a system returning to its original form or state after being compressed or stretched.
Elastic
Define heating and cooling
Heating: Gaining thermal energy
Cooling: Losing thermal Energy
Electricity and magnetism are two forms of the same energy called _____________________.
Electromagnetism; Radiation
Form of energy transmitted through a vacuum and measured on the electromagnetic spectrum.
Radiant Energy
A vase weighs 5N, if it falls from a 10m high building, what is the gravitational potential energy?
GPE= 10J
Losing thermal energy within a system is called _______________.
Cooling
This is defined as the energy of position or the energy of condition
Potential Energy
_____________ energy is the largest source of potential energy in the universe.
Mass energy
The energy equivalent to matter itself according to matter itself according to E = mc²
Mass Energy
A 16-kg man is walking at a speed of 5.0 m/s. What is his kinetic energy
KE= 200J
This is considered the average sum of the kinetic energies of all particles in an object
Thermal Energy
What is nuclear energy? List and define the 2 ways it is released
Potential energy stored in atoms nucleus, released/absorbed when an atom experiences nuclear fission or fusion
Fission: nuclear process that releases energy when two atoms merge
Fusion: nuclear process that releases energy when two atoms break part
Define electrical energy, what is its most useful source?
Energy that’s most common source is found in the excess, the lack, or movement of electrons and the most useful source is manmade.
Completely define the first law of thermodynamics
Energy/Matter can never be created or destroyed; accounts for all forms of energy used
A tennis ball is traveling at 50m/s with a mass of 10kg. What is the momentum?
P= mv
P= 500Kg m/s
Completely describe the movement of acoustic energy
Causes particles to move in periodic motion consisting of back and forth vibrations; KE and PE of particles exchanged; Must move through matter, not a vacuum; Distance that the particles move is usually much larger than the size of the particles
Completely describe the conservation of energy, and describe how the pendulum is a simple example for this concept:
Fundamental natural conservation law; total amount of energy entering a process equals the sum of all forms of energy that exist at the end of a process
Moves from KE to PE
Name and completely define the 3 types of collisions that can occur:
Partially Elastic Collisions—when one or both objects in a collision system deform, some of the kinetic energy in the original objects is converted into heat
Inelastic Collisions—occur when colliding objects stick together after the collision
Elastic Collisions—occur when two objects collide and rebound so that the sum of their momentums and the sum of their kinetic energies are the same before and after the collision
When a log burns on a campfire, what is the energy source of the combustion? Into what other forms of energy is this converted?
A log burns by releasing chemical energy; chemical energy is converted into thermal, radiant, acoustic, and mechanical energy
How much mass energy could be obtained from the complete conversion of a compact 10g media player? The speed of light is 3.00 x 10^8 m/s²
E = MC^2
90 x 10^16