The work done to a machine is input work
true or false

True

Explanation:

The work done to a machine is input work is a "true statement" the work done to a machine is input work. Input work is energy, power or even work put into creating/changing/programming a device which can be any machine so the machine carries out what it has been created to complete.

Hope this helps.

the density of gold = 19.3 g/cm3

the relation between density and mass and volume is

density = mass / volume

given :

mass of gold = 13 g

density = 13g / volume = 19.3

volume = 13 /19.3 = 0.67 cm^3

thus volume of gold nugget = 0.67 cm^3