Answer:
C.49 is yr ans...
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Explanation:
Given that,
Length of each rod, L = 15 m
Area of cross section of the rod, 
Young's modulus for steel, 
Total weight of two people, F = 1900 N
We need to find the stretching in the rod when the ride is at rest. The formula of Young's modulus of a material is given by :
Here, 
is the stretching in the rod
So, the rod will stretched to 
The viscosity of magma is directly related to the silica content. That being said, the viscosity of magma is higher when the silica content is also high and it is a low viscosity magma when the silica content is also low. The silica content of low viscosity magma is approximately 45 - 55 wt%.
Answer: Option (b) is the correct answer.
Explanation:
Metals are malleable and ductile, that means, metals can be beaten into thin sheets and they can be drawn into thin wires.
While showing the property of malleability and ductility, the bonds between metals did not break as there is only change in the shape of metal.
Thus, we can conclude that out of the given options, in metals, the properties of malleability and ductility are explained by the fact that metallic atoms can roll over without breaking their bonds.
