Answer:
Value of 
Explanation:
We have given
In first case resistance is
and current is 1.8 A
Let the potential difference is v
So
----eqn 1
In second case resistance is
and current is 1.6 A and potential difference will be as it is a series connection
So
----eqn 2
From eqn 1 and eqn 2


Answer:
60-100
Explanation:
A normal resting heart rate for adults ranges from 60 to 100 beats per minute. Generally, a lower heart rate at rest implies more efficient heart function and better cardiovascular fitness.
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Answer:
The electric field is 
Explanation:
From the question we are told that
The radius of the inner sphere is 
The radius of the outer sphere is 
The charge on the inner sphere is 
The charge on the outer sphere is 
The position from the origin is 
Generally the electric field is mathematically represented as

The reason for using
for the calculation is due to the fact that the position considered is greater than the
but less than 
Here k is the Coulomb constant with value 
So


Answer: Gravity
Explanation: Gravity is pulling down on the ball, making it stay on the floor