Mass, volume, and density, three physical properties, mass, volume, and density.

質量、體積和密度，三種物理特性，質量、體積和密度。

Hey everybody, my name's mass, I'm the amounts of matter in a solid or a liquid or a gas.

大家好，我的名字叫質量，我是固態、液態或氣態物質的量。

My unit is the kilogram, the more force it takes to move me, the more massive I am.

我的單位是公斤，移動我所需的力量越大，我就越巨大。

And let's get this straight, mass is not the same as weight, I stay constant.

讓我們把話說清楚，質量不等於重量，我保持不變。

As for me, I change depending on gravity.

至於我，我會根據重力的變化而變化。

Mass, volume, density, three physical properties, mass, volume, density.

質量、體積、密度、三種物理特性、質量、體積、密度。

I am volume, call me V, the space that something takes up, that's me.

我是體積，叫我 V 吧，事物佔據的空間，就是我。

Tiny as a teardrop, large as the skies, or something in between, I'm a measure of size.

小如淚珠，大如天空，或者介於兩者之間，我都是衡量大小的標準。

Milliliters, or cubic centimeters, either way, I am 3D space.

無論是毫升還是立方厘米，我都是三維空間。

A cool way to find me, drop a thing in water, how much water does it displace?

一個很酷的找我的方法，把一個東西丟進水裡，它會置換出多少水？

Mass, volume, density, three physical properties, mass, volume, and finally, density.

質量、體積、密度，三種物理特性，質量、體積，最後是密度。

I'm density, how tightly packed your molecules are, like people in a subway car.

我說的是密度，你的分子是多麼緊密，就像地鐵車廂裡的人一樣。

Are they close or are they far?

是近還是遠？

Density, I'm density, does something float in the air or sea?

密度，我是密度，有東西浮在空中或海上嗎？

If the object has less density, it floats, buoyancy.

如果物體的密度較小，它就會漂浮，這就是浮力。

Maybe I have buoyancy.

也許我有浮力。

What's our connection?

我們之間有什麼聯繫？

Excellent question.

問得好

We are related like a family.

我們親如一家人。

If you know two of us, you can find the other.

如果你認識我們中的兩個人，你就能找到另一個。

D equals M divided by V, yeah, D equals M divided by V.

D 等於 M 除以 V，沒錯，D 等於 M 除以 V。