chapter 1- physical quantities, units and measurements Flashcards
1
Q
physical quantity
A
a quantity that can be measured. it consists of a numerical magnitude
2
Q
examples of base quantities
A
length, mass, time
3
Q
derived quantities
A
speed, density, temperature
4
Q
period
A
time taken for one complete oscillation
5
Q
scalar quantities
A
physical quantities that only have magnitude
6
Q
vector quantities
A
physical quantities with both magnitude and direction
7
Q
radius of an atom
A
10 ^-10 metres
8
Q
what affects and doesn’t affect period of oscillation of a pendulum
A
- longer string, increases period, decreases frequency
- mass/size of bob does not affect