3 A plumber measures, as accurately as possible, the length and internal diameter of a straight copper pipe. The length is approximately 80 cm and the internal diameter is approximately 2 cm. What is the best combination of instruments for the plumber to use A Ruler for internal diameter and ruler for length
B Ruler for internal diameter and tape for length
C Vernier calipers for internal diameter and ruler for length
D Vernier calipers for internal diameter and tape for length

as we probably am aware that our atmosphere or air have various levels, each level has different gasses, and each gas has another porousness. at the point when the light originates from lower porousness to higher penetrability, it alters its course. with the goal that implies that when the light originates from the moon to the earth, it alters it's course a lot more occasions. it essentially implies that the state of the light piece of the moon is changed on the earth.

not copied too! hope this !

joke:

h o h o hope you have a merry christmas!

0.93xc=0.93x3x10^8m/s

2.54cm is 1 inch

360seconds i 1 hr