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The atmosphere.
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∙ 15y ago
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What are three protective devices used to protect typical power circuits?
Overload protection Short circuit protection Earth leakage protection
Why does plain cement concrete is used?
As far as my knowledge is concerned, PCC is used for 2 purposes 1. It is used as a protective layer for the RCC above so that water from the RCC is not absorbed by the earth below. 2. Provides a base for the concrete and also helps workers to set out the structure above in a easier way
What term is used for the continually frozen layer of soil underneath Earth's surface in high latitudes?
Permafrost is used for the continually frozen layer of soil underneath Earth's surface in high latitudes.
How does scientist were able to arrive at the distinct layer of the earth?
They used earthquake waves.
What protects us from most of the electromagnetic radiation from the sun?
The ozone layer protects the earth from most of the electromagnetic radiation from the sun. This is usually not enough protection on sunny days so a sun screen should be used when people are active outside.
What is the earth layer?
In 1942 the geophysicist Keith Bullen published a paper describing the earth's internal layering in which he used letters to designate various layers from the surface to the core. In this scheme, the earth's lower mantle was known as the D layer.
What is the Earth's D layer?
In 1942 the geophysicist Keith Bullen published a paper describing the earth's internal layering in which he used letters to designate various layers from the surface to the core. In this scheme, the earth's lower mantle was known as the D layer.
What was the thin layer of earth used to insulate cottages and barns in Scotland?
Scottish crofts were often roofed with turf, sometimes over a layer of thatch.
What is the term used for the layer of gas that completely surround the earth to an altitude of 400 miles?
troposphere
How have chlorofluocarbons harmed the environment?
For years people thought chlorofluorocarbons were harmless. Then someone discovered they destroyed the ozone in the ozone layer. The ozone layer stops the most dangerous of the sun's rays. Those rays cause cancer when they strike an individual. The continued use of chlorofluorocarbons would wipe out life on earth that lives above the ground or above sea level from cancer. As a result, it became illegal to make machinery that used them. When machines that used them had to be repaired, a different refrigerant had to be used.
What are the advantages of an earthwire?
earth wire is used to give us protection against electricity if shocked.
Why is sensitive earth fault protection required?
Sensitive Earth Fault protection is required to either to alarm or trip the faulted circuit. It is usually used for resistance grounded or ungrounded systems; where first earth fault doesn't interrupt supply. It is also used on long overhead lines (even solidly grounded systems) where earth fault currents can be significantly low.
