You've managed somehow to post the mirror image of the circuit diagram, including the numbers and values of the resistors. I'm curious to know how you did that.
The three resistors at the left end of the diagram are 3Ω , 2Ω , and 1Ω all in series. They behave like a single resistor of (3+2+1) = 6Ω .
That 6Ω resistor is in parallel with the 2Ω drawn vertically in the middle of the diagram. That combination acts like a single resistor of 1.5Ω in that position.
Finally, we have that 1.5Ω resistor in series with 1Ω and 4Ω . That series combination behaves like a single resistor of <em>6.5Ω</em> across the battery V.
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(source: wikipedia)
<u>Answer:</u>
Mass in kg = 39.88
Mass in pounds = 87.92
<u>Explanation:</u>
We have the expression for Density, ρ = Mass / Volume, in this case density is given and we need to find mass and volume.
Volume of a sphere, we have the expression 
, where r is the radius of sphere.
Radius of sphere, r = Half of diameter = 15/2 = 7.5 cm
So 
Mass = Volume * Density = 1767.15*22.57 = 39884.49 g
Mass in kg = 39884.49/1000 = 39.88 kg
Mass in pounds = 39.88*2.205 = 87.92 lb
The work that is done when twice the load is lifted twice the distance is
four times as much
The net work performed by forces acting on an object equals the change in kinetic energy, according to the work-energy theorem.
when an item slows down, the net work applied to it decreases, its change in kinetic energy is negative, and its ultimate kinetic energy is less than its starting kinetic energy. When an item accelerates, positive net work is done on it. All the forces acting on an item must be taken into consideration when determining the net work. You will obtain an incorrect result if you exclude any forces that affect an item or if you add any forces that do not affect it.
Hence The work that is done when twice the load is lifted twice the distance is four times as much
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