1) what is the mass of 10 cc of water?
2) why does a block of wood float on water?
3)how and why can density by used to identify an unknown substance?
4) describe the relationship between density, water, an d things that float
please help me just need these answers to study for my earth science final i need to pass this class!! :)
thank you very much for your help!! :) <3 <3
Of course! I'd be happy to help explain these concepts. Here are the answers to your questions:
1) To determine the mass of 10 cc (cubic centimeters) of water, you need to know the density of water. The density of water is approximately 1 gram per cubic centimeter (1 g/cm³). Therefore, 10 cc of water would have a mass of 10 grams.
2) A block of wood floats on water due to the principle of buoyancy. Buoyancy is caused by the difference in density between the object (in this case, the block of wood) and the fluid (water) it is placed in. If the object is less dense than the fluid, it will float. Wood is less dense than water, so it floats. The air in the pores of wood reduces its overall density, allowing it to float.
3) Density can be used to identify an unknown substance because different substances have different densities. Density is calculated by dividing the mass of an object by its volume. By measuring the mass and volume of an unknown substance, you can calculate its density. Then, you can compare the calculated density with the known densities of different substances to identify what the unknown substance might be.
Additionally, density can help us determine if an object will float or sink in a particular fluid. If the density of an object is less than the density of the fluid, it will float. If the density of an object is greater than the density of the fluid, it will sink.
4) The relationship between density, water, and things that float is based on the principle of buoyancy. An object will float in water if its density is less than that of water. This means that the object is less dense than the water it displaces, allowing it to float on the surface. If the object's density is greater than that of water, it will sink.
In summary, density is a property that helps determine whether an object will float or sink. When the density of an object is less than that of the fluid it is placed in (e.g., wood in water), it will float. When the density of an object is greater than that of the fluid (e.g., a rock in water), it will sink. Density can also be used to identify unknown substances by comparing their densities to known substances.