$1\mathrm{.}1$ What do you understand by the tip$-$speed ratio of wind turbines? Briefly describe

its importance.

$1\mathrm{.}2$ What is a wind farm? Justify why many new wind farms being built offshore.

$1\mathrm{.}3$ A location in Western Cape is to carry out a renovation project. For this location,

the wind speed at $30$ m above ground has been measured to be $4\mathrm{.}7\frac{m}{s}.$ Calculate

the wind speed over the following surface if it is a populated area with Hellman

exponent is $0\mathrm{.}3.$

$1\mathrm{.}4$ If a two$-$blade horizontal axis wind turbine with a $6$ m diameter will be operating at

the calculated wind speed in $(1\mathrm{.}3)$ above, under standard atmospheric $(=1\mathrm{.}225\frac{kg}{m^3}),$

estimate the annual energy production if the turbine efficiency is $0\mathrm{.}56.$