4. En cierto lugar, sopla el viento continuamente a \( 10 \mathrm{~m} / \mathrm{s} \). Calcule la energía mecánica del aire, por unidad de masa, y la potencia que pueda generar un aerogenerador, con 60 m de diámetro de álabes, en ese lugar. Suponga que la densidad del aire es 1.25 \( \mathrm{~kg} / \mathrm{m} 3 \).

Which of the following led directly to the demise of the Virginia Company? an unusually harsh winter an attack by Opechancanough civil war in England an outbreak of the plague

Evaluate the limit using L'Hopital's rule \( \lim _{x \rightarrow \frac{\pi}{2}} 3 \cos (-5 x) \sec (9 x) \)

How much money will you make if you invest \( \$ 3,200 \) with a simple interest rate of \( 4.25 \% \) over the course of 18 years? Round your answer to the nearest cent. (Just enter a value, do not include units in your answer)

25. \( \left(\frac{7}{2} x+2 y\right)\left(2 x-\frac{7}{3} y\right) \)

Let \( y=\tan (2 x+5) \). Find the differential \( d y \) when \( x=2 \) and \( d x=0.2 \) Find the differential \( d y \) when \( x=2 \) and \( d x=0.4 \)