When a cardboard is slowly pulled let's say for example there was a coin which is placed on the top of the cardboard and then the cardboard is pulled slowly the coin which is on top moves with it.
There is a friction force which is being applied between the coin and the cardboard which makes the coin to continue moving with the cardboard.
If it is flicked, the coin will not move will remain and cardboard will move.
The coin did not move because of its tendency to remain at inertia.
Answer:
Option B, Observation 2
Explanation:
The four main observation of Darwin’s areas follows –
Observation 1 – Variation occurs in the species with time leading to evolution. Offspring of two parents vary distinctly in traits such as height, color, weight etc. These variations are also affected by the surrounding environment
Observation 2-
Based on observation 1, Darwin concluded that offspring inherit traits from their parents. These traits improve the odds of survival and only genetic traits will be passed. Traits developed in an individual due to environment will not be passed on.
Observation 3 –
Offspring compete among themselves to survive.
Observation 4
The fittest among the competing species for survival will survive and pass on its traits to the next generation.
Since here the Pigeon breeders want to exemplify the looks (a genetic trait) of parents to their offspring, observation 2 applies here
Hence, observation b is correct
Answer:
C
Explanation:
Since the dark green phenotype allows the insects' to blend in with their surroundings, there will be generally more of the same dark green phenotype on the remote island. Since they are blending in with their surroundings, they survive easier, and they are able to stay alive long enough to reproduce. Let me know if this helped!
Answer:
They are different because ethanol is a compound that is made by a certain amount of carbon, oxygen and hydrogen, these are the elements that made up ethanol.
Explanation:
Think of it like this ethanol is a cake and carbon, oxygen and hydrogen is the eggs, flours and sugar that is used to make the cake.
Answer: The model is depicting the glacier erosion.
Explanation:
The glaciers are responsible for causing erosion of the earth. They transport the materials away from the locations were they are earlier situated. They carve the materials present beneath the land. They erode the materials like soil, pebbles, boulders, against the pressure of the unstable mass of the ice moving down the slope. The broken ice mass carriers away the broken rocks, materials and soil debris far away from the places where they have been originally situated. This causes the glacial erosion. Also the broken and displaced rocks displace the soil and other materials come in contact with during erosion.
According to the given situation, the ice formed with water only had no impact on the tinfoil on the other hand the ice containing the sand and rocks removed the tinfoil from places. This is because of the friction created by the sand and rocks on the tinfoil. The glacier material like ice, soil, rocks due to friction erode the material come in contact with it with an appreciable pressure underneath.
