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3 years ago

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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You are working at a company that manufactures electri- cal wire. Gold is the most ductile of all metals: it can be stretched in

Alona [7]

Explanation:

We know that the relation between volume and density is as follows.

Volume = $\frac{\text{mass}}{\text{density}}$

So, V = $\frac{10^{-3}}{19.3 \times 10^{3} kg/m^{3}}$

= $5.181 \times 10^{-8} m^{3}$

Now, we will calculate the area as follows.

Area = $\frac{\text{volume}}{\text{length}}$

= $\frac{5.181 \times 10^{-8} m^{3}}{2.4 \times 10^{3}}$

= $2.15 \times 10^{-11} m^{2}$

Formula to calculate the resistance is as follows.

R = $\rho \frac{l}{A}$

= $\frac{2.44 \times 10^{-8} \times 2400}{}2.15 \times 10^{-11}}$

= $2.71 \times 10^{6} ohm$

Thus, we can conclude that the resistance of given wire is $2.71 \times 10^{6} ohm$ .

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3 years ago

Two objects with the same mass move with the same speed but in opposite directions. Compare their kinetic energies.

ddd [48]

Answer:

A. Kinetic energies are equal.

Explanation:

The kinetic energy of the bodies will be equal since the mass and speed are the same.

Kinetic energy is the energy due to the motion of a body.

Mathematically;

K.E = $\frac{1}{2}$ m v²

m is the mass

v is the speed

The kinetic energy is a scalar quantity with no regard for direction.

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Pressure in a liquid increases with its ..........

Novay_Z [31]

Answer: Pressure increases as the depth increases

Explanation: The pressure in a liquid is due to the weight of the column of water above. Since the particles in a liquid are tightly packed, this pressure acts in all directions.

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3 years ago

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Movement of air from land to sea at night, created when cooler, denser air from the land forces up warmer air over the sea.

kondaur [170]

The answer is A. LAND BREEZE

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Which of the following states that all matter tends to "warp" space in its vicinity and that objects react to this warping by ch

astraxan [27]

Einstein's theory of General Relativity states that space-time is able to be warped in the presence of mass or energy. This warping is what "tells" matter how to move in its presence. In the paraphrased words of physicist John Wheeler, matter tells space-time how to warp, and warped space-time tells matter how to move.

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3 years ago