metre is the si unit for length.
metre is the si unit for length.
which of the following is the si unit for length?
metre
the gas constant occurs in the ideal gas law, as follows:









































where "p" is the absolute pressure (si unit pascals), "v" is the volume of gas (si unit cubic metres), "n" is the amount of gas (si unit moles), "m" is the mass (si unit kilograms) contained in "v", and "t" is the thermodynamic temperature (si unit kelvins). "r" is the molar-weight-specific gas constant, discussed below. the gas constant is expressed in the same physical units as molar entropy and molar heat capacity.









































section::::dimensions.









































from the ideal gas law "pv" = "nrt" we get:
gas constant
when measuring absorbed dose in a human due to external exposure, the si unit the gray, or the related non-si rad are used. from these can be developed the dose equivalents to consider biological effects from differing radiation types and target materials. these are equivalent dose, and effective dose for which the si unit sievert or the non-si rem are used.









































section::::radiation-related quantities.









































the following table shows radiation quantities in si and non-si units:









































section::::see also.









































bullet::::- wilhelm conrad röntgen









































bullet::::- rad (unit)—c.g.s. unit of absorbed dose









































bullet::::- gray (unit)—si unit of absorbed dose
roentgen (unit)