Which of the following correctly describes the formula for speed?
speed equals direction plus time
speed equals distance plus direction
speed equals distance over time
speed equals mass over time

Speed equals distance over time.

Explanation:

Speed of an object is equal to the total distance covered divided by total time taken. The mathematical formula for speed of an object is given by :

d = distance covered

t = time taken

Speed of an object is a scalar quantity. Its SI unit is m/s or meters per second. So, the correct option is (c) "Speed equals distance over time".

"the periodic table is arranged in order of atomic number."

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