Question

Suppose that the three fundamental standards of the metricsystemwere length, density, and time rather than length, mass, andtime.The standard of density in this system is to be defined asthat ofwater. Which of the following are among the considerationsaboutwater that you would need to address to make sure that thestandardof density is as accurate as possible?

i) that the amount of water is at some defined value

ii)that the pressure of the water is at somedefinedvalue

iii)that the temperature of the water is at sdomedefinedvalue

iv)that the water is pure

Answers

a) i, ii, iii

b) ii, iii, iv

c) i only

d) all four