So You Want to Be a SURGEON [Ep. 2] #SHORTS

Suppose you want to convert a gas into a liquid. Which two methods can you apply ?

...... do you want?

If you want to see an enlarged image of your face, state whether you will use a concave mirror or a convex mirror ?

As an investor, you want to put in capital with least risk and assured return for a short time period. Explain any four such instruments that you can invest in.