6 of the Physics glossary’s terms, each with the part of the syllabus where you first meet it.
Sound with a frequency above the upper limit of human hearing, about 20 kHz.
The range, either side of a measured value, within which the true value is expected to lie.
One-twelfth of the mass of a carbon-12 atom:
Acceleration that stays the same in magnitude and direction, so that the velocity changes by equal amounts in equal times.
Motion in a circle at constant speed; the velocity changes direction continuously, so the body accelerates towards the centre.
A field with the same magnitude and direction at every point, shown by parallel, equally spaced field lines.