The phrase "a spark occurs" is correct and usable in written English.
It can be used in contexts discussing events, reactions, or moments of inspiration, often in scientific or metaphorical discussions.
Example: "When the two chemicals are mixed, a spark occurs, indicating a reaction has taken place."
Alternatives: "a spark happens" or "a spark takes place."
In the low embodied version, the participants watched four animations of a spark occurring between the virtual hand on screen and the silver "glow globe" or spark candle on the right.
The final possibility you may observe is that no spark occurs.
Representative image frames recorded at 41.5 ms intervals show a Ca2+ spark occurring at 124.5 ms after the start of recording (frame 3 of Figure 2A), that rapidly decayed within a single frame interval of 41.5 ms (frame 4).
We must assume the unseen arc and fall of another spark occurred late in the morning, in bright sunshine, and this time it reached the pile of bags, impregnated with TNT dust.
The spark discharge occurs across a 2-mm gap with pulse duration approximately 10 ns.
When these high-frequency voltages find a path to earth through a bearing, transfer of metal or electrical discharge machining (EDM) sparking occurs between the bearing's ball and the bearing's race.
Sparking occurs sporadically on the surface as the voltage is over 300 V and the instantaneous current density after 45 min of anodization increases with increasing voltage.
Wire electrical discharge machining is a thermo-electrical process in which material is eroded from the workpiece through a series of discrete sparks occurring between the workpiece and the wire electrode (tool).
At a diastolic [Ca2+]i of approximately 100 nM, Ca2+ sparks occur at a very low rate (100 s−100ell−100
Calcium sparks occurred with a frequency of 2.6 Hz, a rise time of 17 ms and a time to half-decay of 20 ms. Ryanodine reduced spark frequency within 3 min from 2.6 to 0.6 Hz.
