yes it is
He performed his task with great celerity.
not sure but i know that celerity means speed
No, "celerity" is a noun that means swiftness or speed. It is not a verb and does not have a past tense form.
Although the heavy snowfall was not expected, the highway department respond with surprising celerity.
Celerity (swiftness of motion) is a noun. Celebrity is also a noun.
Quickness, speed
Yes .
In Harrys third school year i mean the star?
sirius black is a criminal the only ppl trusting him are harry....he does end up dying
Because Gryffindor and Slytherin are rivals and Snape did not like Sirius' friend, James Potter. Also, Sirius and James targeted Severus as someone to humiliate throughout their school years.
acceleration
The celerity (speed) of a shallow water wave can be calculated using the formula: c = √(g * d), where c is the wave celerity, g is the acceleration due to gravity, and d is the depth of the water. The period of the wave does not directly affect the celerity in this calculation.