Chapter 1, Measurements

Question 1

What are the base quantities for length, mass and time respectively

Answer 1

Metre (m), kilogram (kg) , second (s)

Question 2

Prefix and symbol for 10^12

Answer 2

Tera, T (uppercase)

Question 3

Prefix and symbol for 10^9

Answer 3

Giga, G (uppercase)

Question 4

Prefix and symbol for 10^6

Answer 4

Mega, M (uppercase)

Question 5

Prefix and symbol for 10^3

Answer 5

Kilo, k (lowercase)

Question 6

Prefix for 10^-1

Answer 6

Deci, d (lowercase)

Question 7

Prefix for 10^-2

Answer 7

Centi, c (lowercase)

Question 8

Prefix for 10^-3

Answer 8

Milli, m

Question 9

Prefix for 10^-6

Answer 9

Micro, µ

Question 10

Prefix for 10^-9

Answer 10

Nano, n

Question 11

What is the period of an oscillation

Answer 11

The time taken for one complete oscillation

Question 12

What is a scalar and vector quantity respectively

Answer 12

Scalar quantities are physical quantities that have only magnitude

Vector quantities are physical quantities that have both magnitude and direction

Question 13

What are some examples of scalar and vectore quantities (name at least 3 for each)

Answer 13

Scalar
-distance
-speed
-mass
-energy
-time

Vector
-displacement
-velocity
-acceleration
-force
-weight

Question 14

What is the difference between speed and velocity

Answer 14

Speed is the distance moved per unit time. It is a scalar quantity.

Velocity is the rate of change of displacement. It is a vector quantity.