Anything that is
studied or analyzed
must be measured
International system of units.
Lenght
Dimensions
Metre/ meter (m)
Mass
Amount of matter.
Kilograms (kg)
Time
Duration of events
Second (s)
Electric current
Flow of electric charge
Amphere (A)
Amount of substance
Number of elementary
entities.
Mol (mol)
Temperature
Comparative measurement
of heath an object
Kelvin (K)
Luminous intensity.
Power emitted by a light
source with a direction
Candela (cd)
Order of magnitude.
The number of power of ten
contained in a number
Prefixes
peta (k) - 15
Teta (T) - 12
Giga (G) 9
Mega (M) - 6
Kilo (K) - 3
Deci (d) - -1
centi (c)- -2
mili (m)- -3
Micro (M)- -6
nano (n)- -9
pico (p)- -12
femto (f)- -15
What is
energy?
Is the capacity of a system to
do work
Types of energy
There are 23 types of energy in
total.
+Electric energy, luminous energy, mechanical energy, heat energy, wind energy,
solar energy, nuclear energy, kinetic energy, potential energy, chemical energy,
hydraulic power, sound energy, radiant energy, photovoltaic power, energy of
reaction ionic energy, geothermal energy, wave power, electromagnetic energy, and
some other
The 7 more importants are
Electrical energy
Is the energy created by electrons.
All matter contains atoms that
contain electrons. When electrons
are force down a conductive path;
the movement produces
electricity.
Luminous energy
The radiant energy of electromagnetic waves in
the visible portion of the electromagnetic
spectrum.
Mechanical energy
Is the energy that is possessed by an object
due to its motion or due to its position.
Solar energy
Solar energy is the technology
used to harness the sun's energy
and make it useable.
Nuclear energy
Is energy in the core (nucleus) of
an atom. Is the enormous
energy in the bonds that hold
atoms together. It can be
released from atoms into two
ways: nuclear fusion and nuclear
fission
Wind energy
Is the use of air flow through wind
turbines to mechanically power
generators for electricity.
Thermal energy
Is what we call energy that comes from the
temperature of matter. The hotter the
substance, the more its molecules vibrate, and
therefore the higher its thermal energy.