which of the following correctly identifies an SI unit and the tool that is used to measure it?
a. meter, ruler
b. degrees Fahrenheit, thermometer
c. gram, scale
d. millimeter, meniscus
I can't decide between a and c.
Hint:
The seven SI base units are:
metre for length, kilogram for mass, second for time, ampere for electric current, kelvin for temperature, candela for luminous intensity, and mole for amount (of substance).
Hint 2: One of these is not like the others.
Is it a?
To determine the correct answer between options (a) and (c), we need to understand the SI units and the tools used to measure them:
(a) Meter and ruler:
The SI unit for length is the meter (m). A ruler is a tool commonly used to measure length, and it is suitable for measuring meters. Therefore, option (a) is correct.
(c) Gram and scale:
The SI unit for mass is the kilogram (kg), not the gram (g). However, if we consider the gram as a unit, a scale is a common tool used to measure mass, including grams. So, while option (c) is not entirely accurate in terms of SI units, it can be seen as a valid option when considering the gram as a unit of mass.
In conclusion, the correct answer is option (a) - meter, ruler.