Ch E Flashcards
What are standard units?
Units used for each measurable quantities
Si unit mass
Kg
Si unit time
Second
Si unit distance
Meter
What temp does water freeze c and F°
32°F 0°F
Extensive property
A property that depends on amount of substance
Intensive property
A property independent of amount given of substance
Energy
Capacity to do work
Work
Amount of force through distance
Thermal energy
Energy assorting with temp of obj
Kinetic energy
Energy associated with motion
Potential energy
Energy associated with position and composition
Exothermo
A process where a system loses energy
Endothermic
A process where a system gains thermal energy
Accuracy
How close a measurement is to actual value
Precision
How reproducible data is,
Systematic error and what causes it
Arrow values are too high or too low/ materials misuse
Random error
Just wrong
Sf rules
Add and sub go to lowest decimal and mult and division you go to lowest sig fig and round at end
Sf Os
If there is leading Os or hailing disregard unless they are internal
Density
Mas/vol
How to and total energy
Potential energy + kinetic energy
Joule
Kgm^2/s^2
t or f 0s after decimal point count
true
