Science

• Energy

  Capacity to do work
• Heat

  Thermal energy in transfer due to the differences in temperature of the objects to a low temperature
• Types of heat transfer

  Conduction

  Convection

  Radiation

  Spotaneous process

  Non spotaneous process
• Heat engine

  Device that converts heat into mechanical work.
• Heat engine

  A transferring heat from high temperature reservoir to low temperature reservoir
• Heat pump

  The reverse of heat engine. It is used to reverse the process
• Heat pump a device that allows heat transfer from a cold reservoir to a warmer one
• Momentum and impulse

  Any moving object with a quantity of matter has momentum
• P

  Momentum in kilogram per second (kg.m/s)
• M

  Mass of the moving object in kilogram (kg)
• V

  Velocity of the moving object in meter per second (m/s)
• kg.m/s

  momentum
• kg

  mass
• v

  velocity
• P=m×v

  Momentum is directly proportional to the mass and velocity of an object
• M=p/v

  Mass is directly proportional to momentum and inversely proportional to the velocity of an object
• V=p/m

  Velocity is directly proportional to momentum and inversely proportional to the mass of an object
• Law of conservation of momentum

  When two objects in an isolated system collide the total momentum of the object before the collision is equal to the total momentumof the object after the collision
• M1

  Mass of the first object in kilogram (kg)
• M2

  Mass of the second object in kilogram

  (kg)
• Vr

  Velocity of the combined object after collision in meter per second
• Newton's third law of motion

  If an object exerts force on the other, the other object also exerts force towards it with equal magnitude
• Impulse

  When the object slows down or moves faster, it's velocity decreases or increases
• Radiation

  Transfer by emission of electromagnetic radiation. It also a transfer of heat energy without a medium. It occurs fastest in a vacuum
• Conduction

  Metal is a good conductor of heat and electricity like copper
• F

  Force
• Force

  Is needed to change the momentum of a body