UNIT 4. Types of measurements Flashcards
Length is measured in
meters
Volume is measured in
liters
Mass is measured in
grams
Weight is measured in
Newtons
Time is measured in
seconds
Time is also measured in
hours, minutes, days, months, years
Density is measured in
grams per Litre or Kg/m^3
Temperature is measured in
Kelvin
Heat is measured in
calories
Formula to convert Celsius to Kelvin
T(k) = T cels + 273.15
T(cels) = T(k) - 273.15
Molecules stop moving completely at:
K = 0
Celsius = -273.15 C
Fahrenheit = -459.67 F
Pressure is measured in
N/m^2 or Pa (Pascals)
How many sig figs:
1) 403 g
2) 4300 g
3) 0.02 g
4) 0.150 g
5) 340 g
1) 3
2) 2
3) 1
4) 3
5) 2
Distance between two points:
Length
Amount of space that something occupies:
Volume
Amount of matter in a solid, liquid, or gas:
Mass
Force exerted by a mass by a gravitational field:
Weight
Period between events
Time
Amount of mass per unit volume:
Density
Measure of an average Kinetic energy of the atoms or molecules in a system:
Temperature
Total energy of the molecular motion in a substance:
Heat
Measure of the force exerted in a unit area of surface:
Pressure
What is the difference between heat and temp?
Heat - Total energy of the molecular motion in a substance
Temp - Measure of an average Kinetic energy of the atoms or molecules in a system
Why significant figures are important
For accuracy and precision
