Answer:
A. Constructive
B. Destructive
C. Destructive
D. Constructive
Explanation:
Constructive interference takes place at locations along the path of two superposed waves where the waves are in phase such that a high or low point of one of the waves corresponds with a high or low point of the other wave which gives a resulting wave amplitude which is the sum of the amplitudes of the individual waves
Destructive interference takes place at locations along the path of two superposed waves where one wave is out of phase with the other wave such that a high or low point of one of the waves coincides with a low or high point of the other wave respectively thereby cancelling the effect of the other wave and giving a resulting wave that has an amplitude which is the difference in the amplitudes of the individual waves
Therefore;
At point A, the peak of each wave partially coincides resulting in constructive interference
At point B, the peak of the blue wave and the trough of the red wave partially coincides resulting in destructive interference
At point C, the through of the blue wave and the peak of the back wave partially coincides resulting in destructive interference
At point D, the trough of each wave partially coincides resulting in constructive interference.
The velocity of the wood board which is resting on very smooth ice in the middle of a frozen lake relative to this ice is 0.905 m/s
- What is conservation of momentum:
It states the amount of momentum remains constant
Momentum of a moving body is the product of mass times velocity.
Formula for momentum:
When the two objects collides, then the initial collision of the two body is equal to the final collision of two bodies by the law of conservation of momentum.
here,
mass of wood, m=58.5 kg
mass of boy, M=41.7 kg
velocity of the boy V=1.27 m/s
Thus,
The conservation of momentum,
m*v = M*V
substituting the value,
(58.5*v) = 1.27* 41.7
v = 52.95 / 58.5
v = 0.905 m/s
Thus, the velocity of the wood board which is resting on very smooth ice in the middle of a frozen lake relative to this ice is 0.905 m/s.
Learn more about the conservation of momentum here;
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Answer: A.The moon doesn’t have an atmosphere to burn up the rocks before hitting the surface.
Explanation:
Unlike the Earth, the Moon does not have an atmosphere, this leads to at least to facts:
1) Since the atmosphere (in the case of Earth) is mainly composed of gases (including oxigen) that can make combustion; when a meteor enters in the atmosphere and gets in contact with oxigen it becomes flamable and part of it is burned and separated. Then, if the meteor was large enough, the parts that were not separated will impact on the Earth Surface.
In the Moon, meteors completely impact the surface.
2) In our planet, after the meteorite impact, the crater formed will gradually fade due to erosion caused by the atmosphere. In the case of the Moon, the craters remain intact, since there is not erosion on its surface.
Answer:
Explanation:I don't say you have to mark my ans as brainliest but if you think it has really helped you plz don't forget to thank me ...
To solve this problem we will apply the second law of kinematics that describes the position as a function of speed, time and its acceleration, as
Here,
= Initial velocity
t = Time
a = Acceleration
Our values are,
Replacing we have that
From this expression we could determine the position traveled, without considering that the given speed is the same assumed in the term of acceleration. Under this consideration we would have to v = 4m / s
