Length: Meter
Mass: Kilogram
Volume: Cubic meter
Density: Kilogram per cubic meter
Time: Seconds
Temperature: Celsius or kelvin
The seven base International System of Units are:
Kelvin (Temperature)
kilogram (Mass)
meter (Length)
second (Time)
mole (Amount of Substance)
candela (Luminous Intensity)
Ampere (Current)
The capitalized units are named after notable scientists and engineers, e.g. William Thomson, 1st Baron Kelvin, the 19th Century pioneer of thermodynamic theory.
One Kelvin is equal to one degree Celsius (°C), but absolute zero, 0K = −273.15°C
Mass is most often expressed in kilograms, but the prefix "kilo" is a standard modifier - the root of this apparent anomaly is in 18th Century France, where the term was coined, from the Greek "χίλιοι" (chilioi), meaning "thousand" and "γράμμα" (gramma) meaning "a small weight".
Volume and Density are derived units. Volume is expressed in cubic meters, density in kilograms per cubic meter. Other derived units include the liter (one cubic decimeter), Hertz (per second, or s-1), the Joule (one Newton meter, 1 kgm2s-2), the Watt (one Joule per second), the Volt (one Watt per Ampere). The definitions of Imperial and US units such as the pound (lb) and gallon are now referenced back to the SI standards.
These are all easy to find in your book: Length . . . . . . . Meter Mass . . . . . . . . . Kilogram Volume . . . . . . . Cubic Meter (* Liter is 1/1000th m3, or one dm3) Density . . . . . . . Kilogram per cubic meter Time .. . . . . . . . . Second Temperature . . . Kelvin or Celsius degree (same size)
That depends what you want to measure: length, width, volume, weight, mass, density, etc.
Density = (mass) divided by (volume). You must have known that at some level; otherwise, how did you decide that mass and volume were the things to measure, instead of, say, weight and temperature ?
Length would be the most appropriate unit of measurement
You need to have the volume and the mass to calculate the density
The answer depends on what characteristic you wish to measure: its length, base area, volume, mass, density, optical density, temperature, and so on.
Length. . . . . . . . . meter Mass . . . . . . . . . . kilogram Volume . . . . . . . . cubic meter Density . . . . . . . . gram/cm^3 Time . . . . . . . . . . second Temperature . . . Kelvin
The answer depends on what you want to measure: its mass, length, "equatorial" circumference, volume, density, temperature, conductivity, ...
These are all easy to find in your book: Length . . . . . . . Meter Mass . . . . . . . . . Kilogram Volume . . . . . . . Cubic Meter (* Liter is 1/1000th m3, or one dm3) Density . . . . . . . Kilogram per cubic meter Time .. . . . . . . . . Second Temperature . . . Kelvin or Celsius degree (same size)
Weigh the material in pounds. Then measure the length, width and height. Do this in feet. Calculate the volume by multiplying length x width x height = Volume. Volume = length x width x height Divide the weight by the volume: Weight / Volume Density = Weight / Volume Your density is in units of lbs per cubic foot
That depends what you want to measure: length, width, volume, weight, mass, density, etc.
KilogrammetersecondCoulombTesladegrees Kelvin
Density = mass/volume.
Mass: kilogram, length: meter, volume: cubic meter, density: kilogram / cubic meter, temperature: celcius or kelvin.
The question cannot be answered. Density is a measure of mas per unit volume, or the ratio of mass and volume. 13 millimetres is a measure of distance or length: there is no information in the question about the volume.
Density is Weight per Volume so you measure the weight of the brick using a scale and find the volume by multiplying length by width by height and then divide the weight by the volume.
That depends what aspect of the gas you want to measure: its volume, its pressure, its temperature, its density, etc.