Definition, Terms And Laws Physic

Question 1

Kepler’s third law

Answer 1

The square of the orbital period of any planet is directly propotional to the cube of the radius of each orbit( law of period)

Question 2

Orbital radius

Answer 2

Average value of the distance between the planet and the sun

Question 3

Escape velocity, v

Answer 3

Minimum velocity need by an object on the surface of the earth to overcome the gravitational force and escape to outer space

Question 4

Temperature, T

Answer 4

Measure of the degree of hotness of an object

Question 5

Heat,Q

Answer 5

The amount of thermal energy that can be transfer from one object to another

Question 6

Thermal equilibrium

Answer 6

A condition where net heat transfer between two object become zero

Question 7

Heat capacity ,C

Answer 7

Quantity of heat needed to raise temperature of the object by 1°C

Question 8

Specific heat capacity

Answer 8

Quantity of heat needed to raise the temperature of 1 kg mass of the substance by 1°C

Question 9

Latent heat

Answer 9

Heat that is absorbed during melting and boiling without changed in temperature

Question 10

Specific latent heat,l

Answer 10

The quantity of heat that is absorbed or released during a change of phase of 1kg of the substance without any change in its temperature

Question 11

Specific latent heat of fusion,

Answer 11

The quantity of heat that is absorbed during melting or the quantity of heat released during freezing of one kilogram of the substance without any changed in temperature.

Question 12

Specific latent heat of vaporization

Answer 12

The quantity of heat that is absorbed during boiling or the quantity of release during condensation of one kilogram of the substance without any change in temperature

Question 13

Boyle’s law

Answer 13

Pressure is inversely proportional to volume for a fixed mass of gas at constant temperature

Question 14

Charles’ Law

Answer 14

Volume is directly proportional to absolute temperature for a fixed mass of gas at constant pressure

Question 15

Gay-Lussac’s Law

Answer 15

Pressure is directly proportional to absolute temperature of a fix mass of gas at constant volume

Question 16

Oscillation vibration

Answer 16

Repetitive motion about an equilibrium position in the closed path

Question 17

Amplitude

Answer 17

Maximum displacement from its equilibrium position

Question 18

Transverse wave

Answer 18

A wave Which the vibration of particle in the medium is perpendicular to the direction of propagation of the wave

Question 19

Longitudinal wave

Answer 19

A wave which the vibration of particle in the medium is parallel to the direction of the wave

Question 20

Period

Answer 20

The time taken by a particles to make one complete oscillation or by a source to produce one complete cycle of wave

Question 21

Frequency

Answer 21

Nombor of complete oscillation made by a particle or number of cycle of wave produced by a source in one second

Question 22

Wavelength

Answer 22

Distance between two consecutive point in phase

Question 23

Wave spéed

Answer 23

Distance traveled per second by a wave profile

Question 24

External damping

Answer 24

Oscillating system loses energy to overcome friction or air resistance

Question 25

Internal damping

Answer 25

Oscillating system uses energy because of the stretching and compression of the vibrating particles in the system

Question 26

Damping

Answer 26

Reduction in amplitude in oscillating system due to loss of energy

Question 27

Resonance

Answer 27

When a periodic force is applied to an oscillating system natural frequency

Question 28

Wavefront

Answer 28

Lines joining all the point of the same phase

Question 29

Refraction of waves

Answer 29

The change in direction of propagation of wave cause by the change in the velocity of wave when the wave propagate from one medium to another

Question 30

Diffraction of wave

Answer 30

The spreading of wave when the wave passed through Gap or round a barrier

Question 31

Interference of wave

Answer 31

The super position of two or more wave from a coherent source of wave

Question 32

Constructive interference

Answer 32

A cure when two Crest or trough in superposition to produce maximum amplitude

Question 33

Constructive interference

Answer 33

Occur when two Crest or trough in superposition to produce maximum amplitude

Question 34

Destructive interference

Answer 34

Occur when a Crest and a trough in superposition to produce zero combined amplitude

Question 35

Electromagnetic spectrum

Answer 35

Seven types of electromagnetic wave that forms a continuous spectrum

Question 36

Electromagnetic wave

Answer 36

Produce electric and magnetic field vibrate at right angle to each other

Question 37

Refraction of light

Answer 37

A phenomenon when light change direction when it travels from one medium to another medium of different densities

Question 38

refractive index

Answer 38

The ratio OD speed of light in vacuum to the speed of light in medium

Question 39

Snell's law

Answer 39

When the light travels from one medium to another medium in the incident Ray ,the refracted ray and the normal meet at one point and are in the same plane

Question 40

Total internal reflection

Answer 40

When light travel from a medium with high optical density to a medium of low optical density

Question 41

formation of rainbow

Answer 41

Cause s by refraction ,dispersion and total internal reflection when light passes through water droplet in air

Question 42

Critical angle

Answer 42

Incident angle when refracted angle equal to 90 degree

Question 43

Optical center

Answer 43

Point at the center of the lens

Question 44

Principle axis

Answer 44

Straight line through the optical center of a lens and the centre of curvature of both surface of the lens

Question 45

Axis of lens

Answer 45

Straight line through the optical center and a perpendicular to the principle axis

Question 46

Focal point

Answer 46

Point located at the principle axis of lens

Question 47

Objek distance

Answer 47

Distance between object and optical center of a lens

Question 48

Image distance

Answer 48

Distance between image and optical center of a lens

Question 49

Focal length

Answer 49

Distance between focal point and optical center of lens

Question 50

Lee Miu magnification

Answer 50

Ratio of image to heights to object height are equal to ratio of image distance to object distance

Question 51

Principle axis

Answer 51

Straight line passing through the centre of curvature and pole of the spherical mirror

Question 52

Centre of curvature

Answer 52

Centre of sphere which produce a concave or convex mirror

Question 53

Centre of curvature

Answer 53

Centre of sphere which produce a concave or convex mirror

Question 54

Radius of curvature of mirror

Answer 54

Distance between the pole of spherical mirror and the center of curvature

Question 55

Focal point

Answer 55

A point on this principal axis of the spherical mirror

Question 56

Focal point

Answer 56

A point on this principal axis of the spherical mirror

Question 57

Object distance

Answer 57

Distance between object and the pole of spherical mirror

Question 58

Image distance

Answer 58

Distance between image and the pole of spherical mirror

Question 59

Focal length

Answer 59

Focal length distance between focal point and the pole of spherical mirror