At a construction site, the site manager notices that a crane takes 20 seconds to lift a 500kg steel beam up to a height of 15 m
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Answer:
Explanation:
The power provided by a resistor (wire in this case) is given by:
.
The resistance of a wire is given by:
Where for the resistivity the one of the copper should be used: .
The area A is that of a circle, which written in terms of its diameter is:
Putting all together:
Which for our values is:
Answer:
The value is
Explanation:
From the question we are told that
The value of charge on each three point charge is
The length of the sides of the equilateral triangle is
Generally the total potential energy is mathematically represented as
=>
Here k is coulomb constant with value
=>