A wave oscillates 4.0 times a second and has a wayelength of 3.0 m, What are
the frequency, period, and speed of the wave?

Explanation:

                    Period T = 1 / F  

                                    = 1 / 4

                                T = 0.25 s.

where c represents the speed of a wave,

           f represents the frequency,

          λ represents the wavelength.

                                  c = f λ

                                     = 4.0 3.0

                                  c = 12 m / s.

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 .