watt is the si unit for power which equals joules per second.
watt is the si unit for power which equals joules per second.
what is the si unit for power which equals joules per second?
watt
the joule-second "should not be confused" with the physical process of joules per second (j/s). in physical processes, when the unit of time appears in the denominator of a ratio, the described process occurs at a rate. for example, in discussions about speed, an object like a car travels a known distance of kilometers spread over a known number of seconds, and the car’s rate of speed becomes kilometers per second (km/s). in physics, work per time describes a system’s power; defined by the units of watts (j/s), or joules per second.









































other uses
joule-second
for ionising radiation, the gray is the si unit of specific energy absorbed by matter known as absorbed dose, from which the si unit the sievert is calculated for the stochastic health effect on tissues, known as dose equivalent. the international committee for weights and measures states: "in order to avoid any risk of confusion between the absorbed dose "d" and the dose equivalent "h", the special names for the respective units should be used, that is, the name gray should be used instead of joules per kilogram for the unit of absorbed dose "d" and the name sievert instead of joules per kilogram for the unit of dose equivalent "h"."
specific energy