Chapter 1 - Introduction Flashcards
Energy is the capacity to do ____, and is measured in ______.
Energy (J) = force (N) x distance (m)
Work, Joules.
What percentage of the world’s energy do the fossil fuel trio of, coal, oil and natural gas provide ?
Over 80%.
Force =
And is measured in ______.
Mass (kg) x Acceleration (ms-2)
Newtons.
Power is rate at which energy is being converted from one form to another or transferred from one place to another.
Itis measured in _____.
Watts.
1W = ____.
1Js-1
What are the four basic forms of energy ?
- Kinetic
- Gravitational
- Electrical
- Nuclear
What is the formula for kinetic energy ?
KE (J) = 1/2 x m x v^2
The kinetic energy within a material determines its’ __________.
Temperature.
The formula for Gravitational Potential Energy is ?
Potential Energy = m x g x H
Thermal energy is referring to the …
Heat generated by vibrating molecules within a material.
Express Power (W) in terms of voltage (V) and current (I)
W = V x I
Nuclear fission splits _______ atoms to produce large quantities of ______.
Uranium. Heat.
Nuclear fusion fuses _______ atoms to form _______ atoms.
Hydrogen. Helium.
Percentage efficiency =
(Energy output/Energy input) * 100
What is the first law of Thermodynamics ?
That the total energy in an isolated system remains constant. That energy can be transformed from one type to another but cannot be either created or destroyed.
