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ankoles [38]
3 years ago
12

Hydroelectric plants use __________ to produce electricity. A. fire B. sunlight C. water D. wind

Physics
2 answers:
xz_007 [3.2K]3 years ago
3 0
"Hydro..." means "water".  Hydroelectric plants use the kinetic energy
of falling water to produce electrical energy. 

I wouldn't exactly say that they "use water", because after they produce
the electrical energy, there's still just as much water as there was before.
oee [108]3 years ago
3 0

Answer:

C.

Explanation:

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For the following questions consider a piece of copper wire. a. What type of bond is formed between the copper atoms? b. Describ
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a. metallic bond

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Do all metals expand the same amount when heated??
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A child wearing socks is trying to see how far he can slide across his kitchen floor. If
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3 0
2 years ago
A capacitor consists of two parallel plates, each with an area of 17.0 cm2 , separated by a distance of 0.150 cm . The material
Llana [10]

Answer:

a) C = 40.138\,pF, b) q = 16.056\,nC, c) U = 3.212\,\mu J

Explanation:

a) The capacitance of two parallel plates capacitor with dielectric is given by the following expression:

C = K\cdot \epsilon_{o}\cdot \frac{A}{d}

Where:

K - Dielectric constant.

\epsilon_{o} - Vaccum permitivity.

A - Plate area.

d - Distance between plates.

Hence, the capacitance of the system is:

C = (4.00)\cdot (8.854\times 10^{-12}\,\frac{F}{m} )\cdot \left(\frac{17\times 10^{-4}\,m^{2}}{0.150\times 10^{-2}\,m}\right)

C = 4.014\cdot 10^{-11}\,F

C = 40.138\,pF

b) The charge can be found by using the definition of capacitance:

q = C\cdot V_{batt}

q = (4.014\times 10^{-11}\,F)\cdot (400\,V)

q = 1.606\times 10^{-8}\,C

q = 16.056\,nC

c) The energy stored in the charged capacitor is:

U=\frac{1}{2}\cdot Q\cdot V_{batt}

U=\frac{1}{2}\cdot (1.606\times 10^{-8}\,C)\cdot (400\,V)

U = 3.212\times 10^{-6}\,J

U = 3.212\,\mu J

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3 years ago
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