Either a ruler or a caliper.
There are no millimeters in a milligram. There can't be. Millimeters are units of LENGTH: a millimeter is one-thousandth of a meter (a meter measures a bit more than 39 inches). Milligrams, on the other hand, are units of MASS (more usually, they are called units of WEIGHT). One thousand milligrams equal one gram. About 454 grams equal one pound weight. Obviously, since milligrams and millimeters measure different things (weight and length respectively), they can't be expressed in terms of each other. You might as well ask "how many cupfuls in a mile", or "how many inches in a ton". Millimeters and milligrams are units in the SI system of measurement, which developed from the metric system. The SI system is used in most countries of the world. In some countries (the USA is one) units from much older systems are used: inches, pounds, gallons, etc.
There is no equivalence. A millimetre is a measure of length or distance in 1-dimensional space while a gallon is a measure of volume in 3-dimensional space. The two measure different things and, according to basic principles of dimensional analysis, conversion from one to the other is not valid without some addition information.
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Yes, you can measure a computer mouse in centimeters or millimeters. Most computer mice are compact and typically measure around 10-12 centimeters in length. Some mini or travel mice may be smaller, measuring around 7-9 centimeters.
It is generally easier to measure objects to the nearest centimeter because this unit is larger and allows for quicker estimations, especially for larger objects. Measuring to the nearest millimeter provides more precision but requires more careful alignment and calibration, which can be challenging for some objects. Therefore, for quick assessments, centimeters are often preferable, while millimeters are better for detailed measurements.
Millimeters, inches, light-years, miles, it's all the same: Measure all four sides and add their lengths together. That's what "perimeter" means. For some figures there really is a formula. For example, since a square or a rhombus has all four sides the same length, you can just measure one of them and multiply by 4. But the sides of a trapezoid (not "TARPezoid") don't have any particular relationship in terms of length.
You cannot calculate standard deviation for objects such as concrete cubes - you can only calculate standard deviation for some measure - such as side length, surface area, volume, mass, alkalinity or some other measure.
Objects that are approximately 3 millimeters in size include a standard grain of salt, a small bead, or a typical pencil lead. Some seeds, like those from a small flower or herb, can also be around this size. Additionally, the thickness of a credit card is close to 3 millimeters.
A convex lens has a focal length of 150 millimeters. Some politicians will go to any length to keep their positions. The horse won the race by barely a length.
There is no equivalence. A millimetre is a measure of length or distance in 1-dimensional space while a litre is a measure of volume in 3-dimensional space. The two measure different things and, according to basic principles of dimensional analysis, conversion from one to the other is not valid without some addition information.
There is no equivalence. A millimetre is a measure of length or distance in 1-dimensional space while a litre is a measure of volume in 3-dimensional space. The two measure different things and, according to basic principles of dimensional analysis, conversion from one to the other is not valid without some addition information.
None. A millimetre is a measure of length or distance in 1-dimensional space while a litre is a measure of volume in 3-dimensional space. The two measure different things and, according to basic principles of dimensional analysis, conversion from one to the other is not valid without some addition information.