1 - Working As A Physicist

Question 1

What’s the basic units of mass

Answer 1

Kilogram (kg)

Question 2

What’s the basic units of time

Answer 2

Second (s)

Question 3

What’s the unit of length

Answer 3

Metre (m)

Question 4

What’s the unit of electric current

Answer 4

Ampere (A)

Question 5

What’s the unit of temperature

Answer 5

Kelvin (K)

Question 6

What’s the units for an amount of substance

Answer 6

Mole (mol)

Question 7

What’s the unit for luminous intensity

Answer 7

Candela (cd)

Question 8

What are SI units

Answer 8

Standard units - there are meetings that make definitions for basic quantity’s and units

Question 9

What is the definition of a kilogram

Answer 9

The kilogram is a unit of mass and it’s equal to the mass of the international prototype of the kilogram

Question 10

What’s the defitnion of the second

Answer 10

The second is the duration of 9192631770 periods of the radiation corresponding to the transition between the 2 hyperfine levels of the ground state of the caesium- 133 atom

Question 11

Define the metre

Answer 11

The length of the path travelled by light in vacuum during a time interval of 1/299792458 of a second

Question 12

Define the ampere

Answer 12

The ampere is that constant current which, if maintained in two straight parallel conductors of infinite length, of negligible circular cross - section, and placed 1m apart in vacuum, would produce between these conductors a force
Equal to 2 x 10^-7 Newton per metre of length

Question 13

Define kelvin

Answer 13

The kelvin, unit of thermodynamic temperature, is the fraction of 1/273.16 of the thermodynamic temperature of the triple point of water

Question 14

What is a base unit

Answer 14

Fundamental qualities of things in the universe - eg the length of a pencil is a base unit

Length is a base unit

Question 15

What’s a derived unit

Answer 15

Eg speed - when you have to consider other factors to get that unit

We can just list base units that went together in deriving the derived quantity - eg speed is measured in m s^-1

Some derived units (eg force) should be kg m s ^-2 but we use newton (N)

Question 16

What type of unit are SI units?

Answer 16

Base units

Question 17

Define a mole as a unit

Answer 17

A mole is the amount of substance of a system which contains as many elementary entities as there are atoms in 0.012kg of carbon-12 (when the mole is used, the elementary entities must be specified and may be atoms, molecules, ions, electrons, other particles or specified groups of such particles)

Question 18

Define the candela as a unit

Answer 18

The candela is the luminous intensity, in a given directjon, of a source that emits monochromatic radiation of frequency 540 x 10^12 hertz and that has a radiant intensity in that direction of 1/683 watt per steradian

Question 19

What’s the unit of the derived quantity = force?

Answer 19

Newton (N)

Question 20

What’s the unit of the derived quantity = Energy (work)

Answer 20

Joule (J)

Question 21

What the unit for the derived quantity : power

Answer 21

Watt (W)

Question 22

What’s the unit for the derived quantity : frequency

Answer 22

Hertz (Hz)

Question 23

What’s the unit of the derived quantity : charge

Answer 23

Coulomb (C)

Question 24

What’s the unit for the derived quantity : voltage

Answer 24

Volt (V)

Question 25

What’s the unit for the derived quantity : resistance

Answer 25

Ohm (weird horse show symbol thing)

Question 26

Tell me about the prefix for factor 10^1

Answer 26

Name: deca-
Symbol: da

Question 27

Tell me about the prefix fit factor 10^2

Answer 27

Name: hecto-
Symbol: h

Question 28

Tell me about the prefix for the factor 10^3

Answer 28

Name: kilo-
Symbol: k

Question 29

Tell me about the prefix for factor 10^6

Answer 29

Name: mega-
Symbol: M

Question 30

Tell me about the prefix for factor 10^9

Answer 30

Name: 10^9
Symbol: G

Question 31

Tell me about the prefix for factor 10^12

Answer 31

Name: Tera-
Symbol: T

Question 32

Tell me about the prefix for factor 10^15

Answer 32

Name: peta-
Symbol: P

Question 33

Tell me about the prefix for factor 10^18

Answer 33

Name: exa-
Symbol: E

Question 34

Tell me about the prefix for factor 10^21

Answer 34

Name: zetta-
Symbol: Z

Question 35

Tell me about the prefix for factor 10^24

Answer 35

Name: yotta-
Symbol: Y