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VladimirAG [237]
3 years ago
13

Explain how a significant increase in the use of wind energy would affect the energy supply of coal.

Biology
1 answer:
allsm [11]3 years ago
5 0
<span>The increase in the use of wind energy does not have to affect the energy supply of coal, since they are not related in any way and do not depend on each other. It's totally out of logic. They are different energies, the wind energy should not affect the energetic consumption of coal for the simple fact that coal is not necessary to produce wind energy, but it could be said that the demand for coal could be reduced by a small percentage only If the wind energy is used much more.</span>
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The first P-wave of an earthquake took 11 minutes to travel to a seismic station from the epicenter of the earthquake. What is t
iris [78.8K]

Answer:

\large \boxed{\text{5280 km; 25.5 min }}

Explanation:

1. Distance from epicentre

The average speed of P-waves is about 8 km/s.

(a) Convert minutes to seconds

\text{Time} = \text{11 min} \times \dfrac{\text{60 s}}{\text{1 min}} = \text{660 s}

(b) Calculate the distance

\text{Distance} = \text{ speed} \times \text{time} = \dfrac{\text{8 km}}{\text{1 s}} \times \text{660 s} = \textbf{5280 km}\\\\\text{The seismic station's distance to the epicentre is $\large \boxed{\textbf{5280 km}}$}

2. Time for S-wave

The average speed for an S-wave is about 3.45 km/s.

\begin{array}{rcl}\text{Distance} & = & \text{speed} \times \text{time}\\\text{5280 km} & = & \dfrac{\text{3.45 km}}{\text{1 s}} \times \text{time}\\\\5280 \times \text{1 s} & = & 3.45 \times \text{time}\\\text{Time} & = & \dfrac{\text{5280 s}}{3.45}\\\\ & = & \text{1530 s}\\& = & \textbf{25.5 min}\\\end{array}\\\text{It took the first S-wave $\large \boxed{\textbf{25.5 min}}$ to arrive.}

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