The correct answer is A.
The coefficient of absorption of material A is 30%. So, the material will absorb 30% energy of the incident wave falling on it. Thus, the reflected wave will carry the rest 70% energy.
The coefficient of absorption of material B is 47%. So, the material will absorb 47% energy of the incident wave falling on it. Thus, the reflected wave will carry the rest 53% energy.
The coefficient of absorption of material C is 62%. So, the material will absorb 62% energy of the incident wave falling on it. Thus, the reflected wave will carry the rest 28% energy.
Hence, material C would be the best, because the percentage of the energy in an incident wave that remains in a reflected wave from this material is the smallest.
Answer:
False
Explanation:
The average velocity is defined as the ratio of total displacement traveled to the total time taken.
Average velocity = total displacement / total time
So, It is false.
Answer: The only advantage cutting crops with a sickle is that its very effective for cutting lodged crops.
A measurement has two parts: a value and a unit. a fixed amount of something, like a centimeter (CM) of distance.
Answer:If a 5-kilogram mass is raised vertically 2 meters from the surface of the Earth, its gain in potential energy is approximately 1) 0 J 2) 10 J 3) 20 J 4) 100 J 43.
Explanation: