Why does the density of an object never change?

Answer 1

Oh, I wouldn't agree with that.

There are thousands of people getting denser by the minute.

Answer 2

The density of an object doesn't change if you don't change the object (alter its state, compress it, expand it, that's what I mean), so that's the only time it would correct in assuming so. Think of it this way: density is the mass of the object per volume. If your mass doesn't change (things don't spontaneously have more mass or less unless they are altered) and your volume doesn't change (same with volumes, they remain the same), then your density has to remain constant. If your volume changes but you're working with the same material, there will be less mass that you're also working with, so the density will come out to be the same. If you took the density of half a large marshmallow, you'd be dividing half a marshmallow's mass by half a marshmallow's volume. If you took the density of a quarter of a marshmallow, you'd take a quarter of the marshmallow's mass by a quarter of its volume, and come out with the same density, assuming marshmallows have uniform density. You wouldn't take the mass of the entire marshmallow and divide by a fourth of its volume, as someone suggested above. That's why the density of an object does not change: mass per unit volume (how much mass you have contained in how much volume you're working with, or how much mass you have in one unit of volume you're working with divided by that unit) is density.

By the way, water is LESS DENSE when you freeze it. That's why it floats. But that density changes because the state of your object changed from liquid to solid. Similarly, if you compressed your marshmallow, the density would change.

Answer 3

Density is usually measured in grams per cubic centimeter. These are unfamiliar terms and often turn people off. Let's use a more familiar but less precise measurement: a handfull. Let's say you took a handfull of cotton candy and it weighed an ounce. The density of cotton candy then would be one ounce per handfull. That means one ounce for each or every handful. Now think. No matter how many handfulls you took, cotton candy would still weigh one ounce per handfull. If you had a room full of cotton candy it would still weigh one ounce for every handfull. Density, which is what you just measured, can be used along with other properties to identify a substance. If something is sweet, fluffy, dissolves easily and has a density of one ounce per handfull, it's probably cotton candy.

Answer 4

What do you mean. Density can change. You need to give more details. Is this a homework question? Details

Answer 5

No matter the amount of water one cubic foot of water will still wiegh 62.5 pounds per square foot. Thats 7.48 gallons of water that wieghs 8.34 pounds per gallon. Like the pound of feathers and a pound of bricks the size may vary but the density is the same.

Answer 6

Incorrect! for any given mass the density changes when you change the volume. peace and good luck!

Vin

Answer 7

at first, the vertical velocity does replace by way of fact gravity is appearing on it. Duh. there's a vertical acceleration on the rock. additionally, if it would not supply you an preliminary perspective, there is not any way you will discover the main suitable perspective. If there is not any perspective, the ensuing vector of the rate is likewise impossible to discover.

Answer 8

Its the same chemical properties. If you drink half of a coke the other half still taste the same.

Answer 9

Sure it does. For example, take a glass of water. If you freeze the water, it will become denser. If you boil the water, it will become less dense.

Answer 10

i thought it did