Answer:
1. By removing the reflector or reflecting elements
2. By using absorbing material on the reflecting surfaces.
Explanation:
To solve problems caused by reflecting surfaces, you can remove the reflector or reflecting elements. However, sometimes it is enough to turn/move the reflecting element and change the reflections. Furthermore, using absorbing material on the reflecting surface can help reduce comb filtering as well.
In some cases, it is possible to place the sound source so close to the reflecting surface, that there is no suspension between the direct sound and the reflected sound.
Answer:

Explanation:
Given that,
Vector
............(1)
We need to find the magnitude of vector A. Let us suppose vector in the form of, R = xi + yj + zk. Its magnitude is given by :

In equation (1),
x = 1
y = -2
z = 3
So, the magnitude of vector A is given by :

|A| = 3.74
So, the magnitude of given vector is 3.74. Hence, this is the required solution.
Answer:
If it isn't an ion it should have 35 elektrons to cancel the positivity of the nucleus.
Answer:
The centripetal acceleration of the object is
.
Explanation:
We have,
Radius of a circular path is 200 m
It takes 5 seconds to complete 10 revolutions. The angular velocity of the object is given by the rate of change of angular displacement per unit time :

The centripetal acceleration of the object is given by :

So, the centripetal acceleration of the object is
.