It would not be economical to connect the houses to the National Grid.Give one reason why.

1 answer:

8 0

Why is it not economical to connect houses to the national grid?
Why does it cost so much? Electricity is sent through the National Grid cables at very high voltages - between 132,000 and 400,000. It benefits National Grid to not have to keep investing in reinforcing the high-voltage grid necessary to transport the power long distances

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Sand falls from an overhead bin and accumulates in a conical pile with a radius that is always threethree times its height. Supp

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Answer:

159241.048 cm³/s

Explanation:

r = Radius = 3×height = 3h

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$\text{Volume of cone}=\frac{1}{3}\pi r^2h\\\Rightarrow V=\frac{1}{3}\pi (3h)^2h\\\Rightarrow V=3\pi h^3$

Differentiating with respect to time

$\frac{dv}{dt}=9\pi h^2\frac{dh}{dt}\\\Rightarrow \frac{dv}{dt}=9\pi 16^2\times 22\\\Rightarrow \frac{dv}{dt}=159241.048\ cm^3/s$

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The force due to friction is generally independent of the contact area between the two surfaces. This means that even if you have two heavy objects of the same mass, where one is half as long and twice as high as the other one, they still experience the same frictional force when you drag them over the ground.

Explanation:

Independent

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