താപവ്യതിയാനങ്ങൾ, ചലനം, പ്രവേഗം, ത്വരണം, ചലന നിയമങ്ങൾ എന്നിവയുമായി ബന്ധപ്പെട്ട ചോദ്യങ്ങളാണ് ഇന്നത്തെ പാഠത്തിൽ.
- The process of conversion of a liquid into vapour is known as
Evaporation
- The process of conversion of a solid directly into vapour is known as
Sublimation
- Example of an object showing sublimation
Camphor
- Quantity of heat required to convert unit mass of solid at its melting point into liquid is called
Latent heat of Fusion
- For ice at 0°C, the latent heat of fusion is
80K Cal/kg
- Quantity of heat required to convert unit mass of liquid at its boiling point into vapour is called
Latent heat of vapourisation
- For water at 100°C, the latent heat of vaporisation is
540K Cal/kg
- Device which converts heat energy into mechanical energy
Heat engine
- A body is said to be a perfect blackbody if its
Absorption power is 1
- A surface which absorbs all the heat radiations incident on it is known as
Perfectly black body
- Device used to measure the temperature of sun
Pyrheliometer
- Radiations received from a black body is called
Black body radiation
- Estimated value of surface temperature of sun is
5778K
- Study of high temperature is known as
Pyrology
- Study of motion is known as
Mechanics
- Study of causes and changes in motion is known as
Dynamics
- Change in position of an object with respect to time and its surroundings is called
Motion
- If an object does not change its position with respect to its surroundings, it is said to be
Stationary
- The distance traveled by a body in unit time is called
Speed (Distance/Time)
- Change in position of an object in a particular direction is called
Displacement
- The distance traveled by a body in a definite direction in unit time is called
Velocity (Displacement/Time)
- The rate of change of velocity of a moving body is called
Acceleration (Change in velocity/Time)
- Slope of velocity time graph gives
Acceleration
- Shape of acceleration versus mass graph for constant force is
Hyperbola
- At terminal velocity the acceleration of body is
Zero
- If the velocity of moving body decreases, the change in velocity is called
Retardation or Deceleration
- Example of one dimensional motion
Throwing a stone straight up
- Example of two dimensional motion
Projectile motion, Boat in a lake, Satellite revolving uniformly around earth
- Example of three dimensional motion
Motion of a charged particle, A kite in air
- If a body is moving in a circular path then the motion is said to be in
Circular motion
- To and fro motion of an object is called
Oscillatory motion
- Example of oscillatory motion
Pendulum of a clock
- If a body is moving in a line then the motion is said to be in
Translational motion or Linear motion
- Translational motion in a straight line is called
Rectilinear motion (Eg: Lift motion)
- Translational motion in a curved path is called
Curvilinear motion (Eg: Motion of rocket in space)
- Motion which repeats after regular intervals of time
Periodic motion (Eg: Rotation of earth around sun)
- If the axis of the rotating body is within the body, its motion is said to be
Spin motion or Rotational motion (Earth spin)
- When an object travels around another object, its motion is known as
Revolution (Eg: Earth travels around Sun)
- Motion of an object in a vertical plane under the influence of gravitational force is known as
Projectile motion
- Projectile path is known as
Trajectory
- Projectile path is always
Parabola
- Projectile reach its maximum range when the angle of projection is at
45°
- The tendency of a body to continue its state of rest or uniform motion along a straight line is called
Inertia
- Law of inertia was discovered by
Galileo
- As the bus starts moving, a man sitting inside leans backward because of
Inertia of rest
- As the bus stops moving, a man sitting inside bend in forwarding direction because of
Inertia of motion
- Rotating wheel throw out mud tangentially outward because of
Inertia of direction
- Force required to stop a moving body depends on
Its mass and velocity
- Uniform acceleration produced in a freely falling body due to the gravitational pull of the earth is known as
Acceleration due to gravity (g=9.8 m/s²)
- In earth acceleration due to gravity is maximum at
Polar regions
- In earth acceleration due to gravity is minimum at
Equatorial regions
- In earth acceleration due to gravity is zero at
Centre of the Earth
(To be Continued…)