Which type of process is currently used in nuclear electricity generation?

Minimum velocity of wind required for a functional windmill is about:

The use of dry wood as domestic fuel is not considered good. State two reasons for it.

$A$ group of farmers teamed together to set-up a biogas plant close to their farms. List any six advantages that they would be able to derive from the plant.

State whether the following statement is true or false:
Spherical reflectors are used to obtain high temperatures in solar heating devices.

Give two uses of coke.