PHYSICAL QUANTITY

Heat: formulas and units of measurement

Heat: symbol Q, unit J. Formulas and explanations for MCT and thermodynamics, Electricity.

Qjoule

KEY CONNECTIONS

Formulas

Q = mcΔt

Q = mλ

Q = mr

Q = I²Rt

Q = ΔU + A

NOTATION

: The amount of heat is the energy received or given off by a body during heat exchange.
: Mass is a scalar physical quantity that is a measure of the inertia of a body.
: Specific heat capacity is the energy required to heat a unit of mass by one degree.
: Temperature change is the difference between the final and initial body temperatures.
: Specific heat of fusion is the energy required to melt a unit mass of a substance.
: Specific heat of vaporization is the energy required to convert a unit mass of liquid into vapor.
: Current strength is the charge passing through the cross section of a conductor per unit time.
: Electrical resistance is a measure of a conductor's resistance to electric current.
: Time is a quantity characterizing the duration and sequence of events.
: The change in internal energy is the magnitude of the change in the energy of the particles of the system.
: Work is a measure of energy transferred when a force is applied.

THEORY

PRACTICE

Topics in order: the concepts, quantities and formulas of a lesson with explanations and examples.

Statements, answer options and a detailed walkthrough for every topic of the course.

A 10-question check-up, exercises with answer checking, and saved progress.