Why is the total volume of water and alcohol less?
When water and ethyl alcohol mix, several forces come into play. First, between the water and ethyl alcohol is strong hydrogen bonding that draws the different molecules close together. The 2 different molecules pack closer together than in pure solution, resulting in a reduction of volume.
Why do liquids have different densities?
Lighter liquids (like water or vegetable oil) are less dense than heavier liquids (like honey or corn syrup) so they float on top of the heavier liquids. The same amount of two different liquids you used in the container will have different densities because they have different masses.
What does it mean when something is less dense?
Key Concepts. The density of an object determines whether it will float or sink in another substance. An object will float if it is less dense than the liquid it is placed in. An object will sink if it is more dense than the liquid it is placed in.
What does high and low density mean?
If the particles are loosely packed together with plenty of space between them, it will have a low density and will be able to float. And if the particles are tightly packed together with no or very little space between the particles, it will have higher density.
What are the characteristics of low density dwellings?
Low density areas usually have more green space but do not have as much commercial space nearby. Most cities have low or high density zones, and the number of units allowed in each type of area is defined by the city.
What is low density hair?
And how can we change it? Low density means your hair strands are lower than the average amount of individual strands on your head. It also means being able to easily see your scalp; therefore, it is affecting you from having thick and full hair.
What is multi family low density?
The R-2 low-density multiple-family residential zone is intended as a low-density residential district of single-family detached dwellings and duplexes. ( Ord. 1683 ยง 1, 2006; Urg.
What does low density mean on a CT scan?
The density of the tissue is in proportion to the attenuation of the x-rays which pass through. Tissues like air and water have little attenuation and are displayed as low densities (dark), whereas bone has high attenuation and is displayed as high density (bright) on CT.
What does fluid look like on CT?
Fluid on CT is relatively hypodense (dark). It can be compared to fluid in the gallbladder or stomach. Dense fluid may suggest hemoperitoneum, especially in the context of trauma.
What is Hypoattenuation on CT?
Definition. Describes areas on an x-ray or CT scan that show up as whiter or brighter than normal. [ from NCI]