What is a Thread in Java?

A thread executes a series of instructions. Every line of code that is processed is done so by a thread. Few threads can run for the complete life of the applet, while others are alive for only a few milliseconds. A thread can also create a new thread or kills an existing one if when a new thread is created by the user. The Threads run in methods or constructors. The methods and constructors reside in the computer's memory themselves are lifeless in thread case. The threads go into the methods and continue to follow their instructions.

A short note on Usable groundwater

A Usable groundwater is enclosed in the aquifers, which are subterranean areas (or the layers) of permeable material (like sand and gravel) that channel the groundwater's flow. The Aquifers can be either confined or unconfined. If a confined aquifer goes after a downward grade from a recharge zone, the groundwater can turn out to be pressurized as it flows. This can form artesian wells that flow freely not including the need of a pump. The top of the upper unconfined aquifer is known as the water table or phreatic surface, where water pressure is equivalent to the atmospheric pressure.

What do you mean by Intelligence, IQ, and g?

The Intelligence, IQ, and g are different. The Intelligence is the word used in ordinary discourse to known as the cognitive ability. On the other hand, it is normally regarded as too inaccurate to be useful for a scientific treatment of the subject. The intelligence quotient (IQ) is an index considered from the scores on test items evaluated by experts to take in the abilities covered by the word intelligence. The IQ measures a multidimensional quantity: it is a combination of different kinds of abilities, the proportions of which probably will differ between IQ tests. The dimensionality of IQ scores can be considered by the factor analysis, which reveals a single main factor basic the scores on all IQ tests. This thing, which is a hypothetical construct, is called g. Variation in g corresponds directly to the intuitive notion of intelligence, and therefore g is at times called general cognitive ability or the general intelligence.

A short note on Columbia River

The Columbia River is a river located in British Columbia and the Pacific Northwest of the United States. It is the biggest river in volume flowing into the Pacific Ocean from the North America, and the second biggest in the United States. It is the biggest hydroelectric power producing river in the North America. It starts from its headwaters to the Pacific Ocean it flows 1,270 miles (2,044 km) and it drains 258,000 square miles (415,211 s-kM).

Columbia River is the largest river in the planet that has no delta. The river continues flow west with one small north-northwesterly-directed and stretch near Portland; Vancouver, the Washington; and the confluence with the Willamette River. On this sharp turn the river's flow slows by a long way and it drops the sediment that would generally form a delta.