chemistry question?

Question

Which of these is not an SI base unit?
a) meter
b) Kelvin
c) cm
d) yard

Answer 1

yard

Answer 2

yard because SI is Le Systeme International d'Unites for the reccomended practical system of units of measurement. A base unit of measurement is not defined in terms of other units but has its own standard definition. the definition of the five base units is summarized as below

for meter
one meter is the distance light travels in vacuum, during a time interval of 1/299792458 of a second

for kelvin
one kelvin is 1/273.16 of the temperature of the triple point of water

Answer 3

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Answer 4

d, the yard.

Answer 5

d) yard

Answer 6

b, since a,c, and d all measure distance, and kelvins measure temperature

Answer 7

c and d

Answer 8

D

Answer 9

B