Answer:
Explanation:
Given
mass 

(inclination)=

Let T be the tension in the rope
From Diagram
-----------------1
where 

For block 
-----------2
From 1 & 2




Isaac Newton is famous for the three laws
Answer:

Explanation:
As we know that position of first minimum on the either side of central maximum is given as


so the width of the central maximum is given as

so we have

so we have



Answer:
d. epicentral distance scale
Explanation:
The depth of focus from the epicenter, called as Focal Depth, is an important parameter in determining the damaging potential of an earthquake. Most of the damaging earthquakes have shallow focus with focal depths less than about 70km. Distance from epicenter to any point of interest is called epicentral distance