Tissue breaks apart in water, but not if thrown off a tall building. This is mainly due to the tissue's molecular structure and the high amount of air resistance.Know More
Tissue is made up of mostly cellulose fibers. In dry paper, the cohesive force between the fibers is strong. However, once water is introduced, these bonds become much weaker. This is because the cohesive forces that bind the cellulose fibers are hydrostatic in nature. And since tissue is hydrophillic, more water enters the bonds and more of the structure is weakened.
Tissue does not break when thrown off a tall building because it has a large surface area to weight ratio, which displaces air relative to its movement and slows it down.Learn more about Puzzles & Brainteasers
Since non-polar substances are held together by weak van der Waals interactions and water molecules use strong hydrogen bonds, the van der Waal interactions of non-polar substances are not strong enough to break the hydrogen bonds of the water molecules. Accordingly, the non-polar substance cannot disperse itself in water.Full Answer >
Although a gas water heater must be vented for several reasons, the most important reason is that it ensures the carbon monoxide produced by the heater can escape the building. The vent also draws air into the heater to help it work more efficiently.Full Answer >
An 80-gallon water heater is used, like water heaters of other capacities, to provide hot water to a building with indoor plumbing that has differentiated pipes for hot and cold water. The water heater consists of a large tank over a heating unit that is either gas or electric.Full Answer >
Since gas-based hot water heaters burn natural gas or propane, they require venting to keep potentially dangerous gases out of the building. In general, this gas venting is automatic and requires no extra power, but units that require power venting are sometimes used in especially large systems.Full Answer >