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During compressive forces, materials experience a decrease in volume and an increase in density due to the inward pressure. In contrast, during tensile forces, materials experience an increase in volume and a decrease in density as they stretch and become thinner.

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What changes in the land masses occurred during this epoch?

During the Eocene epoch, significant changes in land masses occurred due to the breakup of the supercontinent of Gondwana. This led to the opening of the South Atlantic Ocean and the separation of South America from Africa. Additionally, India continued its northward drift towards Asia, setting the stage for the collision that would eventually form the Himalayan mountain range.


Why does intervertebral discs exhibit large amount of tensil strength to absorb shock?

Intervertebral discs have a unique structure that contributes to their tensile strength and shock-absorbing capabilities. The outer layer, called the annulus fibrosus, is composed of tough collagen fibers arranged in a crisscross pattern, which provides stability and resistance to tensile forces. The inner gel-like nucleus pulposus absorbs compressive forces and distributes loads evenly, allowing the discs to effectively cushion the spine during movement. This combination of materials and configuration enables intervertebral discs to withstand significant mechanical stress and absorb shock during daily activities.


Did Significant plate tectonic changes occurred on Earth during the Mesozoic Era?

Yes, significant plate tectonic changes occurred during the Mesozoic Era, which lasted from about 252 to 66 million years ago. This era saw the breakup of the supercontinent Pangaea into smaller landmasses, leading to the formation of the Atlantic Ocean and the repositioning of continents. These tectonic movements influenced global climate, sea levels, and biodiversity, contributing to the evolution of distinctive ecosystems.


The Gradual changes that have occurred in the earth's structure during the past 4.5- 5 billion years is termed what?

The gradual changes that have occurred in the Earth's structure over the past 4.5-5 billion years are collectively referred to as geological processes. These processes include plate tectonics, erosion, and volcanic activity, which have shaped the planet's surface and continue to influence its structure.


What is necking in tension test?

Necking is the localized reduction in cross-sectional area of a material subjected to a tensile force during a tension test. It usually occurs just before the material fractures. This deformation can be observed as a decrease in diameter in a tensile specimen.

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