Kanna kamui runs 100 meters in a relay race. if her average velocity is 10.8 meters per second then how long did it take her to reach the finish line.

we know,

displacement = 100 meters

time = ?

average velocity = 10.8 m/s

now,

average velocity = displacement ÷ time

or, 10.8 = 100 ÷ time

or, 10.8 × time  = 100

or, time = 100 ÷ 10.8

Time = 9.25 seconds

answer: the rock sample is a sedimentary rock.

explanation:

it is given that:

mass of rock sample, m = 2.7 g

volume of rock sample,

so, density of rock sample will be

since, the density of rock sample is . hence, the rock sample is a sedimentary rock, whose densities varies between .