Explanation

The admixtures slow down the initial rate of hydration of cement or prolong the setting of cement paste in concrete.

Retarding admixtures are frequently required in hot weather conditions to facilitate delaying the setting time

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Explanation

The third edition of the popular Structural and Stress Analysis provides the reader with a comprehensive introduction to all types of structural and stress analysis.

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Explanation

The center of gravity of an object is where we can consider all of the weight of the object to be concentrated.

This is a useful concept in physics and engineering.

Explanation

Water conservation is the practice of using water efficiently to reduce waste and preserve this precious resource.

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Explanation

Concrete drying is a continuous and fluid event, and usually reaches its full effective strength after about 28 days.

Explanation

Liquified HCl has been cooled until the gas turns into a liquid.

ND06-08-2023

Explanation

Except at the magnetic pole, the Earth's magnetic field is always horizontal

 the horizontal component of the earth's magnetic field is zero at the magnetic poles.

Hence, Earth's magnetic field always has a horizontal component except at the magnetic poles where it is zero.

Explanation

Photo resistors  are light sensitive variable resistors 

فوٹو ریزسٹرز روشنی کے حساس متغیر ریزسٹرس ہیں۔

Explanation

 Gallium is a chemical element.

Atomic Number of Gallium is 31

Explanation

 Gallium is a chemical element.

Atomic Number of Gallium is 31