2006-09-27 12:32:11 · 7 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
The "base units" the International System of Units (SI) are given below. All other units can be defined in these 7 base units.
Mass = kilogram. It's the only one of the 7 base units that's still defined in terms of an actual physical object - the "international prototype of the kilogram", which is an actual piece of 90%Pt-10%Ir alloy kept in a special vault at the Bureau International des Poids et Measures outside of Paris.
Length = meter = the length of the path travelled by light in vacuum during a time interval of 1/299,792,458 of a second.
Time = second = the duration of 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the cesium-133 atom.
Electrical current = ampere = the constant current which, if maintained in two straight parallel conductors of infinite length, of negligible circular cross-section, and placed 1 meter apart in vacuum, would produce between these conductors a force equal to 2 x 10^–7 newton per meter of length.
Temperature = kelvin = the fraction 1/273.16 of the thermodynamic temperature of the triple point of water.
Amount of substance = mole = the amount of substance of a system which contains as many elementary entities as there are atoms in 0.012 kilogram of carbon-12.
Luminous intensity = candela = the luminous intensity, in a given direction, of a source that emits monochromatic radiation of frequency 540 x 10^12 hertz and that has a radiant intensity in that direction of 1/683 watt per steradian.
Density and Volume are not base units in the SI system, but in terms of the base units these would be expressed as:
Volume = length^3 = meter^3
Density = mass/volume = kg/meter^3
2006-09-27 12:39:12 · answer #1 · answered by hfshaw 7 · 0⤊ 0⤋
Length= meter= 1m= 1.094yd or 39.73 in
Density= is a porperty of matter. Denisty=mass divided by volume
Volume= m^3
Time= Seconds
Mass= Kilogram= 1kg= 2.205 lbs
2006-09-27 19:39:51 · answer #2 · answered by ruben j 1 · 0⤊ 2⤋
length = meters
density = g/L
volume = L
time = seconds
mass = grams
2006-09-27 19:34:49 · answer #3 · answered by JennyAnn 4 · 0⤊ 1⤋
fyi, check out www.onlineconversion.com for converting btw units
2006-09-27 20:05:05 · answer #4 · answered by junie 2 · 0⤊ 1⤋
length- meters
density- kg/m^3
volume- m^3
time- second
mass- kg
2006-10-01 15:34:26 · answer #5 · answered by yupchagee 7 · 0⤊ 0⤋
Length---m squared
density---kg/m cubed
Volume---m cubed
time -----s
mass----kg
2006-09-27 19:38:06 · answer #6 · answered by chikidii 3 · 0⤊ 1⤋
read your book ...these are too easy
2006-09-27 20:12:22 · answer #7 · answered by The Cheminator 5 · 0⤊ 2⤋