ENERGY
What is energy?
The ability to do work
What is the mechanical energy?
ME = PE + KE
What are the three different temperature scales that are used in the world?
F, C, Kelvin
What are the ends of a magnet called?
The poles (every magnet has them regardless of its shape)
What is electric force?
The force between charged objects
What is power?
Amount of work done per time
What is the law of conservation of energy?
Energy cannot be created or destroyed, only transformed
What is absolute zero?
The point at which an object has no more energy
What is the difference between a solenoid and an electromagnet?
Solenoid is a coil with a current, an electromagnet is a solenoid with a ferromagnetic (iron) core
What is an electron and where is it found?
Negatively charged subatomic particle in shells/orbits
Force per distance
What is nuclear energy? What is fission vs. fusion?
Energy from the nucleus of atoms
Fusion = splitting of electrons
Fission = joining of atoms
Why is Kelvin not measured in degrees?
It is an absolute scale and based on energy
What is electromagnetism?
The relationship between electricity and magnetism. You cannot see it directly, but can see its effect
What is static vs. current electricity?
Static - transfer charge once
Current - Continuous
What is potential energy and the two different types?
Built up energy - no movement
1) Elastic Potential Energy
2) Gravitational Potential Energy
What is chemical energy?
Energy from breaking bonds; eating food
Which is a larger change in temp: 1F or 1C and why?
1C because it is 1-00 between freezing and boiling points of water and 1F is 32-212
How can you represent a magnetic field?
Iron fillings
What is friction?
Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other. There are several types of friction: Dry friction is a force that opposes the relative lateral motion of two solid surfaces in contact.
What is kinetic energy?
The energy of movement
What is the difference between thermal energy, temperature, and heat?
The core difference is that heat deals with thermal energy, whereas temperature is more concerned with molecular kinetic energy. Heat is the transfer of thermal energy, whereas temperature is a property the object exhibits.
What can electromagnets be used for?
Why does the Earth act like a giant magnet and why is this important?
Iron and nickel core - protects and deflects asteroids and solar wind