A copper penny has a mass of about 4grams. A copper kettle has a mass of about 400 grams. What is true about the density of these two objects?

the only thing we know is that the kettle has 100 times the mass of the penny. It is probably true that they have the same density, since they are both made of copper.

To compare the density of two objects, we need to use the formula:

Density = Mass / Volume

Since the objects are made of copper, which has a constant density, we can assume that the density of both the penny and the kettle is the same.

Given that the mass of the penny is about 4 grams, and the mass of the kettle is about 400 grams, we can conclude the following:

1. The density of the penny is lower than the density of the kettle since the mass of the penny is much smaller than the mass of the kettle.
2. The penny has a lower volume compared to the kettle since density is inversely proportional to volume. This implies that the penny is smaller in size compared to the kettle.

In summary, the density of the penny is lower than the density of the kettle, indicating that the penny is smaller and denser compared to the kettle.

To determine what is true about the density of these two objects, we will use the formula for density:

Density = Mass / Volume

Since the question provides us with the mass of the objects, we need to find their volumes. However, we are not given the volume directly. The given information about the mass can only be used to compare the densities.

To compare the densities of the copper penny and the copper kettle, we need to assume that the objects have the same material density (which is reasonable as they are both made of copper). This assumption allows us to focus only on the mass comparison.

From the information given, we know that the mass of the copper penny is about 4 grams, and the mass of the copper kettle is about 400 grams.

Comparing the masses, we can observe that the mass of the copper kettle is 100 times greater than the mass of the copper penny (400 grams / 4 grams = 100).

Since the densities of these two objects are determined by their masses and volumes, and we assumed they have the same material density, we can conclude that the density of the copper kettle is approximately 100 times greater than the density of the copper penny.

In summary, the density of the copper kettle is higher than the density of the copper penny.