The situation is an example of an arithmetic progression through the data 90, 120, 150, .. . In this case, the arithmetic difference is 30. The expression that applies here is an = 90 + 30 * (n - 1) where n is the order of the term to be determined. If n is 8, then the height is equal to a. 300 feet.
By using the same frequency channel.
Not including the endpoints, there are 3 nodes.
<h3>
What is a node?</h3>
In a wave, a node is a stationary point. For example in a vibrating string of a guitar, the endpoints would be nodes.
But here we need to ignore the endpoints, we only know that the wave has two wavelengths.
For a wave with N wavelengths the number of nodes that are not endpoints is just given by 2*N - 1 (while if we counted the endpoints we would have 2*N + 1).
So in this case we have N = 2, then there are 2*2 - 1 = 3 nodes.
If you want to learn more about waves, you can read:
brainly.com/question/14015797
Answer:
0.149 m, 
Explanation:
Let's start by resolving each vector into its components along the x- and y- direction:
And
So the components of the vector sum are
The magnitude of the vector sum is
And the direction is
