Question

give the answers of these short questions ​

Answer 1

Answer:

Answer 1 ::: Hand span and cubit are not used as standard units of length because their sizes vary from person to person. So, two different persons may give different measurements for the same length, which is not desirable for a standard unit.

Explanation:

answer 2 ::: Cubit, unit of linear measure used by many ancient and medieval peoples. ... The cubit, generally taken as equal to 18 inches (457 mm), was based on the length of the arm from the elbow to the tip of the middle finger and was considered the equivalent of 6 palms or 2 spans.Hand span and cubit are not used as standard units of length because their sizes vary from person to person. So, two different persons may give different measurements for the same length, which is not desirable for a standard unit.

answer3;;

Answer 2

Answer:

1-Hand span is not used as standard units of length because their sizes vary from person to person. So, two different persons may give different measurements for the same length, which is not desirable for a standard unit.

2-Cubit -the length of the forearm from the tip of the middle finger to end of the elbow.Cubit is not used as standard units of length because their sizes vary from person to person. So, two different persons may give different measurements for the same length, which is not desirable for a standard unit.

3-Pace or a footstep cannot be used as a standard unit of length because it varies from person to person.

4-Here "2 meter" is signifying the length or say the size of the table . In a particular way is signifying that the table is 2 meter long.

5-Instruments like vernier calliper, metric rulers, scales and measuring tapes are commonly used to measure length.

6-You can use a measuring tape and take the scale in inches or centimetres.