1: Measurements

Question 1

Define SI base units + list them

Answer 1

is a selection of fundamental units where all other physical quantities can be represented as a selection of the SI base units.

kg, m, s, A, K, mol, cd

Question 2

Define derived unit

Answer 2

Derived unit is a product of base si units

Question 3

Define systematic error

Answer 3

Systematic error is an error which causes measurements to have constant magnitude above or below the true value of the measures quantity

Question 4

Define random error

Answer 4

Random error is an error which causes measured quantities to have varying magnitudes above or below the true value of the measured quantity.

Question 5

Define Accuracy

Answer 5

accuracy refers to how close the measured value is from the true value

Question 6

Define precision

Answer 6

Precision refers to how closely each individual measurements agree with each other without any reference to the true value.

Question 7

Define Scalar quantity

Answer 7

Scalar quantity is a quantity which only have magnitude and no direction

Question 8

Define vector quantity

Answer 8

Vector quantity is a quantity which has both magnitude and direction