chapter 1- physical quantities, units and measurements Flashcards

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1
Q

physical quantity

A

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

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2
Q

examples of base quantities

A

length, mass, time

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3
Q

derived quantities

A

speed, density, temperature

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4
Q

period

A

time taken for one complete oscillation

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5
Q

scalar quantities

A

physical quantities that only have magnitude

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6
Q

vector quantities

A

physical quantities with both magnitude and direction

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7
Q

radius of an atom

A

10 ^-10 metres

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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
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