Final answer:
Without explicit context, it is challenging to address how Vm changes when P k is changed to 0.1; it could relate to molar gas volume in physics or electric potential, with different implications for each.
Step-by-step explanation:
The question seems to be referring to the effect of changing a value in an equation related to either gas laws or electric potential. Since 'Vm' is mentioned, it likely pertains to the molar volume of a gas in physics or the electric potential in electromagnetism. However, the reference to 'P k' is unclear without further context. Assuming it relates to the pressure-volume relationship in gases (PV = k), changing 'P k' to 0.1 would imply either a change in pressure or a constant related to specific conditions of a gas sample. If 'P k' refers to pressure and the 'k' constant is held constant, a reduction in pressure would lead to an increase in molar volume (Vm), adhering to Boyle's Law that states pressure and volume are inversely proportional at constant temperature. Conversely, if interpreting 'P k' as a variable in electrical potential equations, changes in pressure would not be related, and the concept might be misapplied.