physics secondary 3 last fight

Question 1

what is a wave

Answer 1

a wave is a disturbance propagates with space that transfer the same amount of energy but not the matter

Question 2

what is motion of moving up and down to the original for a single segment

Answer 2

this motion is called a periodic or cyclical

Question 3

what is a wave front

Answer 3

a wave front is an imaginary line that joins all the adjacent points such as crest ,trough , and in phase called a wave front

Question 4

what happens to the water using a dipper up and down

Answer 4

a series of circular ripples are produced

Question 5

what happen to the water using a straight flat strip

Answer 5

a series of straight ripples are produced

Question 6

repeated periodic motion

Answer 6

an oscillation

Question 7

transverse

Answer 7

a transverse wave a direction of waves that is perpendicular to the direction the wave travels

Question 8

a longitudinal

Answer 8

a longitudinal wave is a direction of vibrations that is parallel to the direction of the wave

Question 9

what is the only wave that is longitudinal

Answer 9

soundwave

Question 10

what is an amplitude

Answer 10

the amplitude is the maximum magnitude of displacement to the rest position

Question 11

displacement

Answer 11

displacement is like any point of the wave this is away from the rest point [displaced from rest position ]

Question 12

crest

Answer 12

the crest is the highest point in the transverse wave

Question 13

trough

Answer 13

the trough is the lowest point of the transverse wave

Question 14

in phase

Answer 14

in phases are 2 points that going in the same direction of motion
all troughs are in phase and all crest are in phase

Question 15

wavelength

Answer 15

a wavelength is shortest distance between 2 trough or 2 crest

Question 16

what is the shape of the wave called

Answer 16

waveform

Question 17

period

Answer 17

period is the time taken by each point of a wave to complete one oscillation

Question 18

frequency

Answer 18

the frequency is the number of oscillation produced within one second

Question 19

formula of frequency

Answer 19

1/ [the time taken to complete one oscillation]

Question 20

s.i unit for frequency

Answer 20

herds

Question 21

to find wavelength

Answer 21

speed x time
speed x period= wavelength

Question 22

wave speed

Answer 22

the wave speed is the distance travelled per time unit

Question 23

what is the wave speed affected by

Answer 23

the properties of the medium like the thickness or the tension

Question 24

what happens to frequency after the medium changes

Answer 24

nothing it remains the same

Question 25

what is internal energy

Answer 25

internal energy is the total amount of kinetic energy associated with the random motion of the particles and the total amount of potential energy in between the particles

Question 26

heat capacity

Answer 26

heat capacity is the change internal energy in an object per change in unit temperature

Question 27

formula for heat capacity

Answer 27

C= q/0L the q is the change internal energy ol is the change in the temperature

Question 28

specific heat capacity

Answer 28

the specific heat capacity is the change in internal energy per unit mass for each change in unit temperature

Question 29

formula of specific heat capacity

Answer 29

c= C/m or q/0l x m c- specific heat capacity C heat capacity m mass q change in internal energy 0l change in temperature

Question 30

melting

Answer 30

melting is the change of state from a solid state to a liquid state through energy being transferred into the object

Question 31

freezing

Answer 31

freezing is the process of change of state from a solid state to liquid state as energy is transferred out of the object

Question 32

boiling

Answer 32

boiling is a change of state from a liquid to gaseous state where energy is transferred into the object

Question 33

condensation

Answer 33

condensation is change in state from a gaseous to liquid state when energy is transfer out of the object

Question 34

evaporation

Answer 34

all particles all move at constant motion at different speed the particles at the surface gain energy transferred from the atmosphere the particles start to move more vigorously and soon they gain enough energy to escape into the atmosphere leaving the particles of lower kinetic energy causing the over energy to decrease and therefore it becomes cooler

Question 35

factors that affect evaporation

Answer 35

boiling point the lower the boiling point the greater rate of evaporation as there is weaker force of attraction to overcome easily the humidity the greater the amount of water vapor in the atmosphere the lower the rate of evaporation as there is a less steeper the water potential gradient surface area as the greater the surface area the greater the rate of evaporation so more particle can be at the surface and gain energy wind speed the greater the rate of wind speed greater rate of evaporation as it decrease humidity pressure the greater the pressure the lower the rate of the evaporation as less molecules escape as the temperature increase the rate of evaporation increase

Question 36

latent heat

Answer 36

latent heat is the amount of heat needed to be absorbed or released for an object to change its state of matter

Question 37

s.i unit latent heat

Answer 37

joules

Question 38

what are the 2 type of latent heat

Answer 38

latent heat of fusion which is the change in state between solid and liquids and latent heat vapourisation which is the change of state between liquid and gas

Question 39

latent heat of fusion

Answer 39

latent heat of fusion is the total energy transferred to achieve a state from solid to liquid at constant temperature

Question 40

specific latent heat of fusion

Answer 40

specific latent heat of fusion is the amount of energy to transfer needed to go from solid to liquid per unit mass at a constant temperature

Question 41

formula

Answer 41

L = l / m L specific latent heat of fusion l latent heat of fusion m mass

Question 42

latent heat of vapourisation

Answer 42

latent of vapourisation is the amount of energy needed to transferred changing from a state of liquid to gas at constant temperature

Question 43

specific latent heat of vapourisation

Answer 43

which is the total energy needed to be transferred to achieve liquid to gas per unit mass at a constant temperature

Question 44

heating curve opposite

Answer 44

cooling curve

Question 45

solidification

Answer 45

during solidification the ratio of liquid to solid increases as the temperature is constant

Question 46

condensation

Answer 46

during condensation the ratio of gas to liquid increases as the temperature remains constant