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Liula [17]
3 years ago
10

In hydroelectric dams, gravitational potential energy is used to produce electrical energy. What is the mass of water that must

fall over a dam that is 12 m high in order to produce the same amount of energy in an AA battery (10,800 J)?
Physics
1 answer:
ddd [48]3 years ago
5 0

What mass of water must fall 12m in order to lose 10,800J of gravitational potential energy ?

Potential energy = (mass) x (gravity) x (height)

10,800J = (mass) x (9.8 m/s²) x (12m)

Mass = (10,800J) / (9.8 m/s² x 12m)

Mass = (10,800 / 9.8 x 12) (Joule-sec²/m²)

(Units:  Joule-sec²/m² = N-m-sec²/m² = (kg-m/s²)-m-sec²/m² = <u><em>kg </em></u>)

<u>Mass = 91.8 kg</u>

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The secondary coil of a step-up transformer provides the voltage that operates an electrostatic air filter. The turns ratio of t
Sphinxa [80]

Answer:

The power consumed by the air filter is 9.936 watts      

Explanation:

It is given that, the secondary coil of a step-up transformer provides the voltage that operates an electrostatic air filter.

Turn ratio of the transformer, \dfrac{N_s}{N_p}=\dfrac{46}{1}

Voltage of primary coil, V_p=120\ V

Current in the secondary coil, I_s=1.8\times 10^{-3}\ A

The power consumed by the air filter is :

P_s=I_s\times V_s...........(1)

For a transformer, \dfrac{N_s}{N_p}=\dfrac{V_s}{V_p}

So, P_s=I_s\times (\dfrac{N_s}{N_p})\times V_p

P_s=1.8\times 10^{-3}\times (\dfrac{46}{1})\times 120

P_s=9.936\ Watts

So, the power consumed by the air filter is 9.936 watts. Hence, this is the required solution.                

3 0
4 years ago
Read 2 more answers
Which region contains the alkaline earth metal family of elements? A, B, C or D?
BartSMP [9]

Answer:

B

Explanation:

B is the most likely region that contains alkaline earth family elements.

4 0
3 years ago
What is the mass of an object that requires 100n of force in order to accelerate it at 10m/s^2
Shkiper50 [21]
100.10= 1000

the formula is:

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3 years ago
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Distribution of Intensity with angular distance
Soloha48 [4]

Answer:

It increases

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When the angular motion increases its intensity will also increase making it to spin fast.

Feel free to follow me and make this the brainliest answer.

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4 years ago
Which of the following is NOT true of physical properties A:Substances change form or shape B:Substances remain the same C:Chemi
lutik1710 [3]

<u>Answer</u>:

"Chemical bonds are formed or broken" is NOT true about physical properties.

<u>Explanation</u>:

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8 0
3 years ago
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