Answer:
Option (A)
Explanation:
A barometer is a device that is commonly used in the field of meteorology in order to measure the atmospheric pressure. This atmospheric pressure normally varies depending on the elevation, which could be above or below the mean sea level. So it can be precisely used at any particular elevation. It is easy to carry and is very widely used. The mercury liquid is commonly used in the barometer. The SI unit of atmospheric pressure is Pascal.
So, it is a very important device that helps in determining the weather condition at any given place.
Thus, the correct answer is option (A).
A cyclic change in the earth system repeats the same steps over and over, though not necessarily with the same results or at the same rate.
The Earth's climate cycles across a wide range of time scales, from years to decades to centuries to millennia. Different physical processes can start cycles at different scales. All of these layered systems and cycles working in concert determine the climate over any particular period.
Scientists examine Earth's cycles in an effort to understand how our world functions. Our planet's climates can vary as a result of modifications to Earth's cycles. Our understanding of how humans are influencing these cycles and how that can transform the world will grow as we learn more about them.
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To know the source of the chemicals, the gradient can be used in the hydraulic head among contaminated wells to estimate the groundwater flow paths.
<h3>What is a hydraulic head?</h3>
A hydraulic head refers to a selected size of liquid pressure above a vertical datum. It is commonly measured as a liquid floor elevation, expressed in devices of length, at the entrance of a piezometer.
Hence, To know the source of the chemicals, the gradient can be used in the hydraulic head among contaminated wells to estimate the groundwater flow paths.
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Answer:
The United States gets 81% of its total energy from oil, coal, and natural gas, all of which are fossil fuels. We depend on those fuels to heat our homes, run our vehicles, power industry and manufacturing, and provide us with electricity.
Explanation:
30 °C is around the average temperature during summer
