## Grams and kilograms – measurement lesson for 3rd grade

The table below is based on the kilogram (kg), the International System of Units’ base unit of mass (SI). The kilogram is the only regular unit whose name includes the SI prefix (kilo-). The gram (103 kg) is a mass unit derived from the International System of Units. All SI mass units, however, are named after the gram, not the kilogram; hence, 103 kg is a megagram (106 g), not a “kilokilogram.”
The tonne (t) is a SI-compliant mass unit equal to one megagram (103 kg). The unit is commonly used for masses greater than 103 kg and is often prefixed with SI prefixes. A gigagram, or 109 g, is equivalent to 103 tonnes, or a kilotonne.
Physicists use the mass equivalent of the energy represented by an electronvolt for subatomic particles (eV). Chemists use the mass of one-twelfth of a carbon-12 atom at the atomic level (the dalton). The mass of the sun (M) is used by astronomers.
Unlike other physical quantities, such as time or duration, mass-energy does not have an a priori predicted minimum quantity, nor does it have an observed simple quantum, as does electric charge. Planck’s law allows for photons with arbitrary low energies to occur. As a result, the mass of a theoretically massless particle can only be determined experimentally; in the case of the photon, this verified lower bound is on the order of 31027 eV = 1062 kg.

## Inclined plane physics (force to push object and distance

The weight of a nickel five cent coin in the United States is roughly 5 grams. What term is equal to five grams? A. 50 micrograms 5000 milligrams B. 5000 kilograms (C) 5000 micrograms D. E. none of the preceding
When metals are heated, they expand to a greater volume. Any of the following statements would be valid if a piece of metal was heated? A. The density value measured recently will decreaseB. The metal’s newly determined density value will remain unchanged from the initial value. C. The metal’s mass would also rise, and the newly measured density value would rise as well. E. none of the preceding
What materials, given the following list of densities, would float in a molten lead vat if they did not melt themselves? Densities in milliliters (g/mL): Lead is 11.4, glass is 2.6, gold is 19.3, charcoal is.57, and platinum is 21.4. A. Platinum gold glass charcoal B. Charcoal and glass C. Charcoal and gold D. Platinum and gold E. none of the preceding
A plastic poor is 2.2 cm x 1.5 cm in size and weighs 12.4 grams. Is it true that the block can float in water, and if so, why? No, since the lock has a density of 0.08g/ml, which is higher than the density of water. B. Indeed, since the block’s density is 1.3 g/mL, which is lower than water’s density. C. No, since the block’s density is 1.3 g/mL, which is higher than water’s density. D. Indeed, since the block’s density is 0.80 g/mL, which is lower than water’s density. E. none of the preceding

### Ex: determine the percent below a quartile using a box plot

Which of these three numbers is the most accurate measurement? – one is the most precise? (c) is the most precise calculation, but (b) is the most accurate, since a football field is meant to be 100.0 yards long.
What would we say regarding the density of the bobber in comparison to the density of the water if we see a fishing bobber float on the water’s surface? If the bobber floats on the water’s surface, it must have a lower density than water.
1 yard equals exactly 3 feet, and 1 mile equals 5.280 x 103.3 feet. You can’t actually convert yards to miles to do this because the two don’t have a direct connection. As a result, you must first convert your feet. You will then translate to miles.
Gold has a density of 19.3 grams per mL. A gold-colored nugget with a volume of 34.2 mL and a mass of 661 grams is discovered by a miner. Is it just a gold nugget? We actually compute the density to see if this nugget is gold or not. The nugget is gold if the density is 19.3 g/mL. If not, the nugget isn’t worth anything. M/V = P

### Line plots with fractions

Produced in Paris c.1816, Maelzel’s metronome.a, Metronome No. 7 from Tony Bingham’s collection (TB 07) [5]. b, Illustration taken from an 1815 English patent [6]. The metronome is made up of two masses attached to a rod: the heaviest mass is fixed at the lower end (out of sight), while the lighter upper mass (visible) can be rotated along the rod to adjust the frequency of the oscillation. By reading the scale behind the rod, the user may set the desired tempo and decide its value. The rod is attached to the shaft of the metronome and will oscillate around it. To compensate for friction, a spring-driven escapement wheel is used to add an impulse force to the mechanism, which also provides the metronome’s characteristic audible ticks. All of this is contained inside a pyramid-shaped box that amplifies the metronome’s sound while still supporting its size. The basic operation of modern mechanical metronomes is the same.
In comparison to Beethoven’s labels, performed tempo by stylistic criterion.
The distribution of tempo choices for each mark is shown in each column. Each distribution’s median is represented by a circle, and the grayed line reflects the 1:1 relationship. A 95 percent Confidence Interval (CI) mixed-effects regression line for the medians quantifies the effect of each group of conductors: all the marks are decreased on average by a fixed sum over the entire metronome range, maintaining the relative difference between groups. Surprisingly, 72 beats per minute (7th Symphony, 4th movement; marked by an empty dot) appears to be the only mark that all groups agree as correct, so it was left out of the regression model.