Physics Problem 8th Grade Unit Conversion

Both answers are true.

1mg=1×10^(-3)g=1×10^(-6)kg=1×10^(-9)t ；1cm³=1×10^(-3)dm³=1×10^(-6)m³

Where: mg (milligram), kg (kilogram), t (ton) cm (cubic centimeter) dm (cubic decimeter) m (cubic meter).

So: 550mg = 10dm = 1 10 (-2)m

The first pair. The common ones are mg (milligram), kg (kilogram), t (ton) 1000mg = 1g

1000g = 1kg = 1kg = 2 catties.

1t=1000kg

The second is right.

It is also 1000.

That's right, both of your answers are correct.

Yes, both are true.

The conversion of the physical units in the first volume of the eighth grade is as follows:

Kilometer is equal to 1000 meters, 1 meter is equal to 10 decimeters, 1 decimeter is equal to 10 centimeters, 1 centimeter is equal to 10 millimeters, 1 millimeter is equal to 1000 microns, and 1 micron is equal to 1000 nanometers;

A milliliter is equal to 1 cubic centimeter, 1 cubic decimeter is equal to 1000 cubic centimeters, and 1 cubic meter is equal to 1000 cubic decimeters;

An hour is equal to 60 minutes, 1 minute is equal to 60 seconds, and 1 meter per second is equal to kilometers per hour;

Tons are equal to 1000 kilograms, 1 kilogram is equal to 1000 grams, and 1 gram is equal to 1000 milligrams;

A square meter is equal to 100 square decimeters, and 1 square decimeter is equal to 100 square centimeters.

Note: In the International System of Units, the basic unit of length is the meter (m), the unit of length larger than the "meter" is the "kilometer (km)", and the unit of length smaller than the "meter" is "decimeter (dm)", centimeter (cm), millimeter (mm), micron (m), nanometer (nm), etc. Their conversion relationship:

The conversion relationship between them is: 1km=103m; 1m=10dm=102cm=103mm=106μm=109nm；1mm=10-3m；1μm=10-6m；1nm=10-9m。Therefore, as long as you master these conversion relationships, you can do this kind of calculation problem very well.

First of all, find out that 1mm = 10 -6 km (you can memorize it) then = -6 km

of -5 km

According to this method, step by step, this is actually a physical unit conversion method.

You can practice it.

Negative fifth power.

Negative to the sixth power Negative to the eighth power.

1m=100cm=1000mm=1000000000nm

Well, it's actually very simple, for example, you have a decimal point.

After the start of counting to 1, there are 4 empty, which is 1 into 10 minus 4 squares.

There's also a way to convert the next ladder, I'll tell you later.

D 72m = 72 times 10 to the 9th power nm = multiplied by 10 to the 10th power nm to change the unit, the previous value does not move, first convert the unit, and then calculate the value must be measured from the 0 scale of the scale, not necessarily.

The results are recorded, and the units are not necessary for the wrong ones.

D is selected for the first question and B is selected for the second question