Biology Forums - Study Force

What is the difference between stress and strain? What will be an ideal response?

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Q. 2 - What is meant when rocks are said to be deformed (fractured or folded)? What will be an ideal response?

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Q. 3 - What role do geologists play in engineering large structures like bridges and power plants? What will be an ideal response?

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Q. 4 -

What is the law of universal gravitation? Why is gravitational attraction not the same everywhere on
  the surface of Earth? What will be an ideal response?

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Q. 5 - Why does continental crust stand higher than oceanic crust? What will be an ideal response?

(Answer to question 1 )  Stress is the deforming force; strain is the deformation.

(Answer to question 2 )  

Their shape and/or their volume are altered by the stress of an applied force that is greater than the
rock's internal strength.

(Answer to question 3 )  Geologists understand the history of deformation and the ongoing deformation in the region.

(Answer to question 4 )  

Isaac Newton said that the force of gravity (F) between two masses (m1 and m2) is directly
proportional to their masses and inversely proportional to the square of the distance between their
centers of mass. This means that an attractive force exists between any two objects and the magnitude
of that force varies, depending on the masses of the objects and the distance between their centers.
Gravitational attraction would be the same everywhere on Earth's surface if the planet were perfectly
spherical, homogeneous throughout, and not rotating. But none of these things is true.

(Answer to question 5 )  

Continental crust is granitic with an overall density of 2.7 g/cm3, and oceanic crust is made of basalt
and gabbro with a density for 3.0 g/cm3. Continental crust is around 35 km thick, and in mountain
ranges, it's much thicker. Oceanic crust is only 5 to 10 km thick.

:arrow_up: Correct again