The correct answer is option D, that is, ice floating on the water surface.
The cohesive forces among the molecules of a liquid are accountable for the process called surface tension. Surface tension refers to the tension of the surface film of a liquid resulting due to the attraction of the particles in the surface layer by the bulk of the liquid that seems to reduce the surface area.
The examples of surface tension are walking of small insects on water, floating of a needle, the surface tension of water offers the essential wall tension for the creation of bubbles with water, and surface tension is accountable for the shape of liquid droplets.
The low density of ice makes it float at the liquid water surface, like ice cubes in a glass of water, or an iceberg. The lower density of water in its solid form is because of the way hydrogen bonds are aligned as it freezes, the water molecules are pushed further far away in comparison to the liquid water.
Answer:
The answer is DNA (Deoxyribonucleic acid)
Explanation:
Deoxyribonucleic acid, DNA is the main genetic material found in living organisms.
- It carries information called genes that determine the traits of offsprings.
- Also, it undergoes replication in ONLY living cells, as observed with virus that carries DNA and would ONLY replicate it inside the cell of a living host.
Therefore, DNA is the important molecule that distinguishes living systems from nonliving matter
14.75mph
Explanation:
Given parameters:
Distance traveled = 177miles
Time of arrival in Dallas = 12hours
Unknown:
Average speed = ?
Solution:
The average speed is the total distance covered divided by time taken for the entire travel.
It is the rate of change of distance with time.
Average speed = 
since total distance traveled = 177miles, time of arrival = 12hrs
Average speed = 
= 14.75mph
learn more:
Speed brainly.com/question/10048445
#learnwithBrainly
