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This glossary of physics is a list of definitions of terms and concepts relevant to physics, its sub-disciplines, and related fields, including mechanics, materials science, nuclear physics, particle physics, and thermodynamics. For more inclusive glossaries concerning related fields of science and technology, see Glossary of chemistry terms ...
The period (symbol T) is the interval of time between events, so the period is the reciprocal of the frequency: T = 1/f. [ 2 ] Frequency is an important parameter used in science and engineering to specify the rate of oscillatory and vibratory phenomena, such as mechanical vibrations, audio signals ( sound ), radio waves , and light .
Dysmenorrhea, also known as period pain, painful periods or menstrual cramps, is pain during menstruation. [4][5][2] Its usual onset occurs around the time that menstruation begins. [1] Symptoms typically last less than three days. [1] The pain is usually in the pelvis or lower abdomen. [1] Other symptoms may include back pain, diarrhea or nausea.
In classical mechanics, impulse (symbolized by J or Imp) is the change in momentum of an object. If the initial momentum of an object is p1, and a subsequent momentum is p2, the object has received an impulse J: {\displaystyle \mathbf {J} =\mathbf {p} _ {2}-\mathbf {p} _ {1}.} Momentum is a vector quantity, so impulse is also a vector quantity.
Menstruation. Diagram illustrating how the uterus lining builds up and breaks down during the menstrual cycle. Menstruation (also known as a period, among other colloquial terms) is the regular discharge of blood and mucosal tissue from the inner lining of the uterus through the vagina. The menstrual cycle is characterized by the rise and fall ...
also called the magnetic field density or magnetic induction tesla (T), or equivalently, weber per square meter (Wb/m 2) capacitance: farad (F) heat capacity: joule per kelvin (J⋅K −1) constant of integration: varied depending on context speed of light (in vacuum) 299,792,458 meters per second (m/s) speed of sound
Reasons for cramps but no period. There are many conditions that cause cramping or pelvic pain not associated with your period, Dr. Ross explains. Find some common reasons ahead. 1. Ovulation ...
Inertia is the natural tendency of objects in motion to stay in motion and objects at rest to stay at rest, unless a force causes the velocity to change. It is one of the fundamental principles in classical physics, and described by Isaac Newton in his first law of motion (also known as The Principle of Inertia). [1]