Following a lecture on transverse and longitudinal waves, four students make Venn diagrams to characterize these waves.

Question Following a lecture on transverse and longitudinal waves, four students make Venn diagrams to characterize these waves. Which Venn diagram is correct? Answer B Explanation: Waves are periodic oscillations created by a disturbance, that travel carrying energy but not matter. There exist two types of waves: – Transverse waves: the direction of the oscillations … Read more

How many σ and π bonds are present in a molecule of cumulene?

Question How many σ and π bonds are present in a molecule of cumulene? Answer 1 A hydrocarbon with three or more consecutive (cumulative) double bonds is known as a cumulene. They are analogous to allenes, only exhibiting a more elongated chain. The basic molecule in this category is butatriene, which is also simply known … Read more

This represents three steps of the rock cycle. The sediments are layered and compressed in sedimentary rock.

Question This represents three steps of the rock cycle. The sediments are layered and compressed in sedimentary rock. The sedimentary rock is heated and compressed to form metamorphic rock. One thing remains the same from start to finish: the total amount of minerals present. This process represents an important scientific law. What is it? A) … Read more