3(b) A stationary car horn emits a sound wave of frequency 400 Hz. The wavelength of the wave is 0.85 m.
Calculate the speed of sound.
Speed of sound =?
m/s

(Total 3 marks)
Page 3 of 6
d7012021
F
1
a

answer and explanation;

composition refers to both the types of minerals within a rock and the overall chemical makeup of the rock while texture refers to the size and arrangement of the minerals or grains that make up a rock. both composition and texture can be used to classify rocks, such as igneous rocks. texture describes how the rock became solid or crystallized from liquid, melted rock. composition of a rock describes the minerals that make up a particular rock.

  concave means having an outline or surface that curves inward like the interior of a circle or sphere. so the mirror curves inward.