What increases water supply? Dams and reservoirs Rivers transport water to the sea. Dams block rivers so that reservoirs of water build up behind, rather than drain away. This provides large supplies of drinking water all year round and reduces water insecurity , especially where precipitation may be seasonal. What is the difference between water […]
What are the conditions of one dimensional system?
What are the conditions of one dimensional system? Hence, in a one-dimensional system, temperature gradients exist along a single coordinate direction, and heat transfer occurs exclusively in that direction. The system is characterized by steady state conditions if the temperature at each point is independent of time. What is a one dimensional system? A one-dimensional […]
Is there friction in vacuum?
Is there friction in vacuum? The results seemed to go against the laws of physics: The vacuum, by definition, is completely empty space and does not exert friction on objects within it. As a decaying atom moves through the vacuum, it really does experience some kind of force resembling friction. Is there friction on the […]
What happens if you drink liquid helium?
What happens if you drink liquid helium? Although helium is nontoxic and inert, it can act as a simple asphyxiant by displacing the oxygen in air to levels below that required to support life. Inhalation of helium in excessive amounts can cause dizziness, nausea, vomiting, loss of consciousness and death. What is colder than liquid […]
Is calcium more reactive than magnesium?
Is calcium more reactive than magnesium? These metals are less reactive than the neighboring alkali metal. Magnesium is less active than sodium; calcium is less active than potassium; and so on. These metals become more active as we go down the column. Magnesium is more active than beryllium; calcium is more active than magnesium; and […]
Why are metals so hard?
Why are metals so hard? Metal have lots of free electrons which create a huge electron pressure (on the order of 100,000 atm), so to crush them,pressures higher than their internal electron gas pressure is required; this is why they are hard. Do metals have a giant structure? Metals consist of a giant metallic structure. […]
What is the effect of temperature on rubber?
What is the effect of temperature on rubber? The rubber band actually expands when it gets colder! This seems counterintuitive because most materials expand when they are heated and contract when they get cold. This occurs because of the unusual polymer structure of rubber. How long does it take for rubber bands to decompose? 1 […]
What diseases are caused by brain pollution?
What diseases are caused by brain pollution? Answer. water pollution causes diseases such as dysentery Cholera diarrhoea typhoid skin diseases cough cold paralysis blindness Hepatitis and other stomach disorders . What are the causes and effects of having an unhealthy environment? An estimated 12.6 million people died as a result of living or working in […]
What are 4 types of fronts?
What are 4 types of fronts? There are four different types of weather fronts: cold fronts, warm fronts, stationary fronts, and occluded fronts. Cold Front. A side view of a cold front (A, top) and how it is represented on a weather map (B, bottom). Warm Front. Stationary Front. Occluded Front. What are the different […]