Math and constants Flashcards
Mega equals
1,000,000
Kilo equals
1000
Giga equals
1,000,000,000
1 cm = how many mm
10mm
100 cm = how many m
1m
1 kg of pure water = how many litres
1l
1 m cubed = how many litres
1000 litres
1 tonne of refrigeration how many kj/min
233 kj/min
What is atmospheric pressure at sea level
101.325 kPa or 14.696 psi
1 kg = how many grams
1000 g
1 tonne = how many kg
1000kg
1 kg = how many Newtons (force)
9.81 Newtons
1 lbs = how many kg
0.454 kg
What does BEDMAS acronym stand for
Algebra order of operations. Brackets, Exponents, Division, Multiplication, Addition, Subtraction.
In ohms law equation, what represents Watts, Volts, Amps, ohms?
Watts = P power
Volts = E electromotive force
Amps = I intensity
Ohms = R resistance
3 basic electricity calculations
E= IR
P= EI
P= I-squared *R
How many kj/kg is the latent heat of fusion (water)
335 kj/kg
How many kj/kg is the latent heat of evaporation (water)
2257 kj/kg
How many kj/min is a tonne of refrigeration
233 kj/min
What is the specific heat of water
4.18 kj/kg/degrees C or 4.18 kj/kg/K
What is conversion equation for C to F
C = (F-32) *5/9
What is conversion equation for F to C
F = (C*9/5)+32
What is conversion equation for Celsius to Kelvin (absolute temperature)
K= C + 273
What is equations for converting psi and kPa
kPa = psi * 6.895
psi = kPa/6.895
How to get absolute pressure
Gauge pressure + atmospheric pressure (101.325 sea level)
Equation for area of square
Base * height
