a piece of an iron rod is used to measure length and distances is in which object
Answers
Explanation:
This is like the question about how to measure the height of a building. There are many ways:
Use a ruler
Compare to a known length, by finding the least common multiple
Measure the resonant frequency, if you know the speed of sound in the metal (tuning fork style)
Cut a coax cable to the same length and measure its resonant frequency or capacitance or…
use an optical range finder to focus on the near and far ends
set up slits at the ends and measure the interference pattern
measure the diameter with a caliper and then measure the weight
Stand it upright and measure the air pressure at the top and bottom with a barometer
Use it as the rod of a pendulum and measure the period
Answer:
an iron rod of length 100m at 10°c used to measure distance of 2km