2.0 Introduction Flashcards
What is the definition of Physics?
The study of what happens in the world involving matter and energy.
What is the definition of Matter?
Matter is what things or objects are made of.
What three states of matter are there?
Solid, liquid and gas.
What is the definition of Energy?
It is what causes things to happen and is the ability to do work.
What is an SI unit?
International standard unit.
What is the SI unit for mass?
Kg
What is the SI unit for weight/force?
Newton
What is the SI unit for volume?
Litre
What is the SI unit for distance?
metre/km
What is the SI unit for moment/torque?
NM
What is the SI unit for energy/work/heat?
Joules and calorie
What is the SI unit for power?
Watts
What is the SI unit for temperature?
Degrees Celsius and Kelvin
What is the SI unit for pressure?
N/m², hectopascal and millibar
What is the SI unit for density?
kg/m³
What is the SI unit for speed?
m/s and kmph
What is the SI unit for acceleration?
m/s²
What is the conversion for mass (lb to kg)?
1lb = 0.453kg
What is the conversion for weight/force (kg to N)?
1kg = 9.81N
What is the conversion for volume (gal to litres and gal to us gal)?
1 Gal = 4.546 Litres
1 gal = 1.2 us gal
What is the conversion for distance (ft to metres and Nm to Km)?
1ft = 0.3048m
1Nm = 1.852 Km
What is the conversion for energy/work/heat (BTU to J and Cal to J)?
1 BTU = 1055J
1 cal = 4.2 J
What is a BTU?
British Thermal Unit- unit of heat, defined by amount of energy required to heat 1lb of water by 1 fahrenheit.
What is the conversion for temperature (°c to °f)?
1 Celsius = 5/9 -32 fahrenheit
What is the conversion for pressure (bar to psi)?
1 bar = 14.5 psi
