chapter 1- physical quantities, units and measurements

Question 1

physical quantity

Answer 1

a quantity that can be measured. it consists of a numerical magnitude

Question 2

examples of base quantities

Answer 2

length, mass, time

Question 3

derived quantities

Answer 3

speed, density, temperature

Question 4

period

Answer 4

time taken for one complete oscillation

Question 5

scalar quantities

Answer 5

physical quantities that only have magnitude

Question 6

vector quantities

Answer 6

physical quantities with both magnitude and direction

Question 7

radius of an atom

Answer 7

10 ^-10 metres

Question 8

what affects and doesn’t affect period of oscillation of a pendulum

Answer 8

• longer string, increases period, decreases frequency
• mass/size of bob does not affect