To convert tonnes to liters, you need to know the density of the substance. For water, 1 tonne is equal to 1000 liters. So, in the case of water, 45 tonnes would be 45,000 liters.
A centimetre, unless I wanted a very precise value (why?) in which case I would use a millimetre.
You would use grams (g) or kilograms (kg) to measure the weight of a homemade chocolate chip cookie in metric units.
The SI unit used to measure volume is the cubic meter (m^3). In this case, 1 liter is equivalent to 0.001 cubic meters, so a 2 liter soda would have a volume of 0.002 cubic meters.
A cubic meter is a unit of volume; a metric ton is a measure of mass. Depending on what is in a particular cubic meter, the mass may vary between close to zero (in a vacuum), and billions of tons (in a neutron star). For example, a cubic meter of water has a mass of 1 ton, a cubic meter of lead, about 11 tons, a cubic meter of gold, about 19 tons. In every case, you have to multiply the volume with the density of whatever fills the cubic meter.A cubic meter is a unit of volume; a metric ton is a measure of mass. Depending on what is in a particular cubic meter, the mass may vary between close to zero (in a vacuum), and billions of tons (in a neutron star). For example, a cubic meter of water has a mass of 1 ton, a cubic meter of lead, about 11 tons, a cubic meter of gold, about 19 tons. In every case, you have to multiply the volume with the density of whatever fills the cubic meter.A cubic meter is a unit of volume; a metric ton is a measure of mass. Depending on what is in a particular cubic meter, the mass may vary between close to zero (in a vacuum), and billions of tons (in a neutron star). For example, a cubic meter of water has a mass of 1 ton, a cubic meter of lead, about 11 tons, a cubic meter of gold, about 19 tons. In every case, you have to multiply the volume with the density of whatever fills the cubic meter.A cubic meter is a unit of volume; a metric ton is a measure of mass. Depending on what is in a particular cubic meter, the mass may vary between close to zero (in a vacuum), and billions of tons (in a neutron star). For example, a cubic meter of water has a mass of 1 ton, a cubic meter of lead, about 11 tons, a cubic meter of gold, about 19 tons. In every case, you have to multiply the volume with the density of whatever fills the cubic meter.
It depends on the matter. Regular solid matter could be measured in metric measurements with a rule or a tape measure. Or in weight. Or in the volume of water the matter displaces, in which case the measurement would be in litres and millilitres.
To convert tonnes to liters, you need to know the density of the substance. For water, 1 tonne is equal to 1000 liters. So, in the case of water, 45 tonnes would be 45,000 liters.
Square centimetres: unless I was in production in which case square millimetres.
A centimetre, unless I wanted a very precise value (why?) in which case I would use a millimetre.
A litre. Unless you wanted to be particularly precise, in which case millilitre.
Length * Width * Height.
The answer would depend on what characteristic of the drop of water you wished to measure: its mass, surface area, volume, length, shape, refractive index, and so on. In any case, the tool would be much the same as the tool used for the traditional measurement - only the units would differ/
A unit of volume such as a litre.
It truly doesn't matter which you measure first. Unless you are trying to find a property of something that is dependent on either mass or volume, but not the other; in which case you would find first the one you need to make the unknown property.
You would use grams (g) or kilograms (kg) to measure the weight of a homemade chocolate chip cookie in metric units.
188 milliliters (ml) is equal to 188 milligrams (mg). They have the same numerical value because both milliliters and milligrams are metric units of measurement, but they measure different properties. Milliliters measure volume, while milligrams measure mass. So, in this case, 188 ml is equivalent to 188 mg.
A kg is a measure of mass, a cubic meter is a measure of volume, so without a way to convert from one to the other (in this case a mass density), the question has no meaning. If you were considering something with a density of about 1 gram per cm, like water, then the answer would be 1000 kg (a metric tonne), but if the substance were 5 grams per cm, like rock, then the answer would be 5000 kg