Explanation:
Catastrophism is a geological concept or ideology that was formerly in place. It suggests that the earth crust has evolved through only drastic and violent geological events.
Uniformitarianism suggests that the earth carefully evolved over a period of time and that the processes that are occurring today have occurred in times past.
- Catastrophism presents a drastic and rapid evolution of the crust.
- Uniformitarianism takes a gradual approach to events and suggests that we can use the present to unravel the past.
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Answer:
Option A, greater in case A
Explanation:
<u>Case A
</u>
N-W=ma
N=W+ma
Where a is acceleration, m is mass, W is weight
<u>Case B
</u>
W-n=ma
N=W-ma
Therefore, the reading is greater in case A
Answer:
The magnitude of electric force on object B due to object A when they are 2r distance apart is F/4.
Explanation:
Given :
Electric charge on object A = +Q
Electric charge on object B = +4Q
When the objects A and B are r distance apart, the magnitude of electrostatic force exerted on B due to A is given by the relation :
.....(1)
Now, the two objects are apart by distance of 2r, hence the force acting on the object B due to A is :
Substitute equation (1) in the above equation.
