VxD.

Mass is known as VxD=Msquared, so add this to your workings out and you find the correct answer. Also mass producation is known as Mollemass.

No. Windows 95 supported only VxD drivers, which no Windows in the NT line (NT 3.1, 3.5, 3.51, 4, 2000, XP, Vista) support. Windows 98 supported both WDM and VxD. WDMs are the only supported driver model in 2000 and XP. If written well, a WDM driver from Windows 98 could work on Vista, but it is highly unlikely that hardware that runs with Windows 98 would be used in a Vista computer anyway. Also, certain components, such as the print spooler, have been totally rewritten for Vista, and thus the drivers do not work anymore. Vista-specific drivers also provide better performance.

Yes. Both Windows 98 and Windows ME support the two primary driver models in place during that time period: VxD and WDM. Windows 2000 used WDM and an older driver model from the previous NT versions. Windows 95 only supported VxDs.

the units of density are mass/volume so anything that gives you those variables. A scale and graduated cylinder be used if you fill the cylinder with water and the monitor the displacement of the water. 1ml of water is equal to 1 cubic cm (thats volume)