Pyhsical Science Flashcards
Conduction
process by which heat or electricity is directly transmitted through a substance when there is a difference of temperature or of electrical potential between adjoining regions, without movement of the material.
Convection
the movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink under the influence of gravity, which consequently results in transfer of heat.
Radiation
the emission of energy as electromagnetic waves or as moving subatomic particles, especially high-energy particles that cause ionization.
Physical property
Any property that is measurable, whose value describes a state of a physical system
Physical change
Changes affecting the form of a chemical substance, but not its chemical composition
Chemical property
A property or characteristic of a substance that is observed during a reaction in which the chemical composition or identity of the substance is changed
Chemical change
Usually irreversible chemical reaction involving the rearrangement of the atoms of one or more substances and a change in their chemical properties or composition, resulting in the formation of at least one new substance
Speed
the rate at which someone or something is able to move or operate
Friction
the resistance that one surface or object encounters when moving over another
Newtons 1st law
An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
Newton’s 2nd law
The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object
Newtons 3rd law
For every action, there is an equal and opposite reaction. The statement means that in every interaction, there is a pair of forces acting on the two interacting objects. The size of the forces on the first object equals the size of the force on the second object
