Lecture 5 - Measurement Continued Flashcards
what is the equation for density?
mass (g)/volume (mL or CC)
definition of specific gravity
a quantity that compares the density of a substance with the density of water at the same temperature
what is the equation of specific gravity?
density of subtance (g/mL)/density of water (g/mL)
the specific gravity of a substance is…
equal to its density but contains no units
what are the steps of the cross-stitch method of converting units?
- whatever is diagonal cancels out
- add top exponents
- subtract bottom exponents from the sum of top exponents
how is heat measured?
(kinetic energy) how fast particles in something are moving
equation to convert celsius to fahrenheit
F = 1.8(C) + 32
equation to convert fahrenheit to celsius
C = (F + 32) / 1.8
equation to convert celsius to kelvin
K = C + 273
equation to convert kelvin to celsius
C = K - 273
boiling, freezing, body temp, absolute zero of fahrenheit
boiling of water = 212 degrees
freezing of water = 32 degrees
(180 degree difference)
normal body temp = 98.6 degrees
absolute zero = -460 degrees
boiling, freezing, body temp, absolute zero of celsius
boiling of water = 100 degrees
freezing of water = 0 degrees
(100 degree difference)
normal body temp = 37 degrees
absolute zero = -273 degrees
boiling, freezing, absolute zero of kelvin
boiling of water = 373 k
freezing of water = 273 k
absolute zero = 0 k
what is the rule for significant figures when adding/subtracting?
the answer should have the same number of decimal places as the limiting term (number with the least decimal places)
what is the rule for significant figures when multiplying/dividing?
the answer should have the same number of significant figures as the limiting term (number with the least decimal places
