PTE

the rate at which electric charge passes through a location or surface

how much useful output or service a system provides for the energy it uses

to change from a liquid into vapor at the liquid's surface

the part of a structure that transfers its loads to the ground beneath it

motion in which gravity is the only significant force acting on an object

the number of complete cycles of a repeating event per unit of time

a contact force that opposes relative sliding, or the tendency to slide, between surfaces

a material's resistance to scratching or permanent surface indentation, measured by a specified test

the movement of energy between regions or objects because of a temperature difference

a material that strongly limits the movement of electric charge under specified conditions

energy associated with the motion of an object or system

the temperature at which a substance's solid and liquid forms can coexist in equilibrium at a specified pressure

a small piece or unit of matter, such as an atom, molecule, ion, or grain

energy associated with a system's position or configuration in an interaction

to make a structure stronger by adding support or material

to exert a force that tends to push another object away

the movement of an object turning about an axis

a sharp broken piece of a hard material such as glass or pottery

a physical form of matter, such as solid, liquid, or gas, associated with how its particles behave

made through chemical production rather than obtained directly from a natural source

a pulling force transmitted through a stretched rope, cable, or structural member

an increase in a material's dimensions as its temperature rises under specified conditions

a region containing very little matter, or ideally no matter at all

the rate at which position changes, including both speed and direction

repeated back-and-forth movement of an object or part of a system

the range of electromagnetic radiation that humans can normally see

the electric potential difference between two points, corresponding to energy change per unit charge

a substance that can donate a proton to another substance in an acid-base reaction

the smallest unit of an element that retains that element's chemical identity