Physics Chapter 1

Question 1

SI Base Unit of length

Answer 1

metre (m)

Question 2

SI Base Unit of mass

Answer 2

kilogram (kg)

Question 3

SI Base Unit of time

Answer 3

second (s)

Question 4

SI Base Unit of electric current

Answer 4

ampere (A)

Question 5

SI Base Unit of temperature

Answer 5

kelvin (K)

Question 6

SI Base Unit of amount of substance

Answer 6

mole (mol)

Question 7

volume

Answer 7

cubic metre (m3)

Question 8

density

Answer 8

kilogram per cubic metre (kg/m3 or kg/m-3)

Question 9

velocity

Answer 9

metre per second (m/s or m s-1)

Question 10

acceleration

Answer 10

metre per second squared (m/s 2 or m s -2)

Question 11

force

Answer 11

newton N

Question 12

energy and work

Answer 12

joule J

Question 13

power

Answer 13

watt W

Question 14

frequency

Answer 14

hertz Hz

Question 15

tera

Answer 15

10 power 12 (T)

Question 16

giga

Answer 16

10 power 9 (G)

Question 17

mega

Answer 17

10 power 6 (M)

Question 18

kilo

Answer 18

10 power 3 (k)

Question 19

deci

Answer 19

10 power -1 (d)

Question 20

centi

Answer 20

10 power -2 (c)

Question 21

milli

Answer 21

10 power -3 (m)

Question 22

micro

Answer 22

10 power -6 (weird u)

Question 23

nano

Answer 23

10 power -9 (n)

Question 24

what is the size of an atom?

Answer 24

10 to the power of -10

Question 25

what is the diameter of human hair?

Answer 25

0.0001m

Question 26

what is the diameter of Earth?

Answer 26

13 000 000m

Question 27

Precision

Answer 27

Refers to the smallest measurement that can be read using an instrument

Question 28

Reproducibility

Answer 28

A measurement is precise if it is close to other values obtained by repeating the determination using the same proceedure.

Question 29

Accuracy

Answer 29

closeness to the true value

Question 30

Digital calipers precision

Answer 30

0.1mm or 0.01cm

Question 31

measuring range digital calipers

Answer 31

zero to 15.00cm

Question 32

outside jaws

Answer 32

to measure external diameter or width of an object

Question 33

inside jaws

Answer 33

to measure internal diameter of an object

Question 33

Tail

Answer 33

to measure depth of an object

Question 34

digital micrometer screw gauge

Answer 34

A digital micrometer screw gauge is used to measure objects that are too small to be measured precisely with the digital calipers

Question 35

precision of digital micrometer screw gauge

Answer 35

0.1mm or 0.001cm

Question 36

measuring range of digital micrometer screw gauge

Answer 36

zero to 2.500cm

Question 37

precision of metre rule

Answer 37

0.1cm

Question 38

precision of measuring tape

Answer 38

0.1cm

Question 39

measuring range of measuring tape

Answer 39

0 to several metres

Question 40

measuring range of metre rule

Answer 40

0 to 1.000m

Question 41

mass

Answer 41

mass is a measure of the amount of matter in a body

Question 42

what is used to measure mass?

Answer 42

electronic balance/beam balance

Question 43

density

Answer 43

density is defined as the mass per unit volume of a body