Acceleration: The rate of change of velocity over time.

Amplitude:  The maximum displacement from the origin.

Barometer: This is a tool used to measure atmosphere through the use of mercury fluid; looks like inverted "T".

Buoyancy: The upward force exerted by a fluid that opposes the weight of a partially or fully immersed object.

Centrifugal: An apparent outward force felt by an object in a rotating system, resulting from its inertia.

Centripetal: A real force directed towards the center of a circular path, causing an object to change direction and maintain circular motion.

Conduction: Transfer of heat through direct contact.

Convection: Transfer of heat through movements of fluid.

Damping: Resist oscillation or the back and forth.

Density: Measure of how much mass is packed into a specific volume.

Displacement: The straight-line change in an object's position.

Doppler Effect: Change in frequency and wavelength.

Energy: Capacity to do work.

Equilibrium: A state in which opposing forces or influences are balanced.

Fluid Dynamics: Movement of fluid.

Fluid Statics: Fluid is at rest.

Force Oscillation: Force to swing back and forth.

Force: A push or pull acting upon an object, measured in Newtons.

Frequency: Number of cycles completed per second.

Friction: Two surfaces are in contact.

Gravity: The attractive force between masses.

Gravitational acceleration: A rate at which the speed of an object speed up due to gravity (9.8 m/s^2).

Impulse: Force acting for a time interval.

Inertia: The tendency of an object to resist changes in its state of motion.

Instantaneous: Certain time interval.

Intensity: the amount of energy a wave transfers per unit time across a unit surface area perpendicular to the direction of propagation.

Kinematics: Motion in one dimension.

Kinetic Energy: Ability to do work by the virtue of motion.

Laminar Flow: Fluid moves smoothly and orderly.

Latent heat: Energy absorbed or released by a substance during a constant-temperature phase change.

Line of action: Imaginary line of indefinite length which is drawn along  the direction of the force.

Mass: Quantity of matter within an object.

Mechanical Energy: The sum of kinetic and potential energy.

Moment Arm: Perpendicular distance from the line of action of a force to the axis of location.

Momentum: The product of an object's mass and velocity.

Natural Frequency: Frequency which naturally vibrates when disturbed.

Neutron: A subatomic particle that have the same mass as proton but has no charge.

Octave: Interval of two frequencies with a ratio of 2:1.

Oscillate: Swing back and forth.

Period: Time it takes to complete one full cycle.

Potential Energy: Ability to do work by the virtue at position.

Power: The rate at which work is done.

Pressure: Continuous physical force exerted on or against an object by something in contact with it.

Projectile Motion: Any object launched into the air by an initial force that continues to move, influenced primarily by gravity and inertia.

Radiation: Energy that is released from a source and travels as wave (occurs when electromagnetic radiation is emitted/absorbed).

Rarefaction: Reduction of an items density.

Resonance: Happens when natural frequency and oscillation happen at the same time.

Scalar: Quantity that only have magnitude.

Strain: how much a material stretches or deforms when stress is applied.

Stress: Amount of force applied per unit area of materials.

Temperature: Average kinetic energy of an atom or molecule.

Torque: Tendency to produce a change in rotational motion.

Transverse wave: Vibration of the particles that is perpendicular  to the direction of propagation.

Turbulent flow: Chaotic fluid movement.

Vector: Quantity that have both magnitude and direction.

Velocity: The rate and direction of motion.

Wavelength: Distance between consecutive wave peaks.

Weight: The force exerted on an object due to gravity.

Work: Energy transferred when an object was moved by a force.