When .you tighten a nut on a bolt, how are you increasing the frictional force ?

What do you mean by the internal energy of an ideal gas? How can you increase the internal energy of a gaseous system?

How do you define force of friction ?

How can you increase the efficiency of a steam engine?

Answer the following : How can you increase the buoyant force acting on a body ?

How can you increase the reduction potential of an electrode?

What do you understand by sensitiveness of a potentiometer and how can you increase the sensitiveness of a potentiometer?