Do you mean penumbra or umbra? Because it is indeed umbra.
Answer:
I'm gonna take a wild guess and say diesel? Jk, Diesel's name has become synonymous with a crude oil derivative, but he designed his engine to use a variety of fuels, from coal dust to vegetable oils. In 1900, at the Paris World Fair, he demonstrated a model based on peanut oil.
Explanation:
It will be the year of 2018
Explanation:
1)the system of measurement which are used by local people in a certain part of world is called local system of measurement.
-The units of measurement which are same throughout the world and accepted by most of people is called standard units of measurement.
2) The local system of measurement are not accurate and reliable.
-The standard units of measurement are accurate and reliable.
3) examples of local system-pathi,muri,pau,etc.
examples of standard system-metre,kilogram, second,etc
HOPE IT HELPS YOU