all have a round shape
cannot have a long shape
do not maintain any shape
vary in shape

virus have very shape. some are round some are long some are short.

the most common energy conversion is from kinetic energy to potential energy, and then from potential energy to kinetic energy.

later on comes the heat energy, mechanical energy, and other energy conversions.

this energy conversion is so common that we can find it in our day to day lives as well.

- one of the most common energy conversions involves the changing of potential energy to kinetic energy or kinetic energy to potential energy

the answer would be knowledge about cars!