# 1). Define young’s modulus, sh

1). Define young’s modulus, shear modulus, and bulk modulus

2). Show a graph of variation of K.E., P.E., and mechanicalenergy with radius r for a satellite in a circular orbit

3). Describe Einstein’s view of the gravitation and curvature ofspace

1) Bulk modulus – The bulk modulus is a constant the describeshow resistant a substance is to compression. It is defined as theratio between pressure increase and the resulting decrease in amaterial’s volume.

Shear modulus :- The shear modulus is defined as the ratio ofshear stress to shear strain. It is also known as the modulus ofrigidity and may be denoted by G or less commonly byS or μ. The SI unit of shear modulus is thePascal (Pa), but values are usually expressed in gigapascals(GPa).

Young modulus – Young’s modulus, numericalconstant, named for the 18th-century English physician andphysicist Thomas Young, that describes the elastic properties of asolid undergoing tension or compression in only one direction, asin the case of a metal rod that after being stretched or compressedlengthwise returns to its original length. Young’s modulus is ameasure of the ability of a material to withstand changes in lengthwhen under lengthwise tension or compression

3) _ Einstein argued that gravity isn’t a force at all. Hedescribed it as a curvature of time and space caused by mass andenergy.

1. Time and space are neither flat nor fixed; they are curvedand distorted by mass and energy.

2. Gravity is not a force, but rather a distortion of time andspace.

3. The effects of gravity are indistinguishable from the effectsof acceleration, over a small space.

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