Answer:
When the familiar red spectral line of the hydrogen spectrum is examined at very high resolution, it is found to be a closely-spaced doublet. This splitting is called fine structure and was one of the first experimental evidences for electron spin.
Explanation:
In a series circuit . . .
-- The total resistance is the sum of the individual resistors.
-- The current is the same at every point in the circuit.
The total resistance in this circuit is (3Ω + 6Ω ) = 9Ω
The current at every point is (V/R) = (12v / 9Ω ) = <em>1.33 A</em> .
Pick choice<em> (a)</em>.
Answer:
The value in m/s 
The value in km/h 
Explanation:
Generally the average velocity of the helicopter is mathematically represented as
substituting 
and 30.0 s for t
We have
=>
Now converting to km/h
=>
Answer:
500 J.
Explanation:
Work done = force * distance
= 25 * 20
= 500 Joules.
