Rad 142 - Units of Measurement

What are the 3 Base Units of Measurements?

- Length

- Mass

- Time

What are the Derived Quantities?

- Area

- Volume

- Density

- Velocity (speed)

- Acceleration

- Force

- Weight

- Work/Energy

- Power

- Heat

- Temperature

What are the 3 types of heat transference?

conduction, convection, radiation

What is ConDuction?

The transfer of heat energy by DIRECT contact between - molecules

What is conVection?

The transfer of heat energy through liquids and gases by moVing molecules

What is Radiation?

The transfer of hear energy by waves between object that are not touching

What is Newton's Laws of Motion?

A body will remain at rest or continue moving unless acted upon by an external force. (Law of Inertia)

Force =

mass X acceleration

To every action there is an

equal and opposite reaction

How is mass measured in the metric system? What unit?

Kg/g

m =

meter

M =

MEGA

Area

- Length X Width

- Distance squared

- m2

Volume

- length x width x height

- Distance cubed

- m3

Density

- Concentration of Mass

- Mass/Volume

- Kg/m3

(Mass = Kg), (Volume = m3)

Velocity (speed)

- Distance / Time

- m/s

(s = Time)

Acceleration

- Change of velocity with time

- Velocity/time

- m/s/s

- m/s2

(DONT CONFUSE WITH VELOCITY)

Force

- Push or pull on an object

- Acceleration of gravity

- Newton

Work (Energy-ability to do work)

Force X Distance

Ergs or Joules

1 erg= 10-7 J

Power

- rate of doing work

- Work/time

- Joules/sec or Watt

Heat

- Random Disorder of Molecules

- Calorie

Temperature

- Measure of Heat

- Degrees

- Celsius, Fahrenheit, Kelvin