physical quantities

Question 1

prefixes

Answer 1

nano n 10^-9, mircro u 10^-6, milli m 10^-3, centi c 10^-2, deci d 10^-1, kilo k 10^3, mega M 10^6, giga G 10^9

Question 2

scalar

Answer 2

magnitude only

mass, time, volume, distance, speed

Question 3

vector

Answer 3

magnitude and direction

displacement, velocity, acceleration, force, weight

Question 4

vernier calipers

Answer 4

precision of 0.01cm
positive zero error: top is infront
negative zero error: top is behind

Question 5

micrometer screw gauge

Answer 5

precision of 0.01mm
positive zero error : zero is below
negative zero error: when zero is above