What is the speed of a 2 hz wave with a wavelength of 10 m

Explanation:

The speed of a wave is given by the following equation:

(1)

Where is the wavelength and the period of the wave.

In addition we know there is an inverse relation between the period of a wave and its frequency :

 (2)

Substituting (2) in (1):

 (3)

Now we can find the velocity of the wave with the known given values applying equation (3):

 (4)

Finally:

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 .

answer: b.

explanation: