A painter stands a horizontal platform which has a mass of 20kg and is 5m long, the platform is suspended by two vertical ropes
1 answer:
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Answer:
Explanation:
The electrical reactance is defined as:
Where:
So, replacing the data provided by the problem:
Now, the impedance can be calculated as:
Where:
Replacing the data:
In order to find the magnitude of the impedance we can use the next equation:
We can use Ohm's law to find the current:
Therefore the current is:
And its magnitude is:
Finally the phase angle of the current is given by:
Answer:
Two identical closely spaced circular disks form a parallel-plate capacitor. Transferring 2.1×109 electrons from one disk to the other causes the electric field strength between them to be 1.6×105 N/C. What are the diameters of the disks?
Explanation:
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