Energy
is defined as the capacity of a system to perform work or produce
heat.
Monday, September 9, 2013
Absolute Pressure & Gauge Pressure
When
pressure is measured relative to a perfect vacuum, it is called
absolute pressure (psia).
When
pressure is measured relative to atmospheric pressure (14.7 psi), it
is called gauge pressure (psig).
Pressure
Pressure
is a measure of the force exerted per unit area on the boundaries of
a substance (or system). It is caused by the collisions of the
molecules of the substance with the boundaries of the system.
Rankine (R) scale
The
absolute scale that corresponds to the Fahrenheit scale is called the
Rankine (R) scale.
Kelvin (K) scale
The
absolute temperature scale that corresponds to the Celsius scale is
called the Kelvin (K) scale.
EARTH HOUR
EARTH HOUR is a global event organized by WWF (World Wide Fund for Nature, also known as World Wildlife Fund) and is held on the last Saturday of March annually, asking households and businesses to turn off their non-essential lights and other electrical appliances for one hour to raise awareness towards the need to take action on climate change.
Subscribe to:
Posts (Atom)