Any vector in the xy-plane has the form v = c1i + c2j + 0k
For v to be perpendicular to a, we need v · a = 0
So, 3c1 - 5c2 = 0
For example, choose c1 = 5 and c2 = 3.
Then v = 5i + 3j + 0k is perpendicular to a.
ll v ll = √[52 + 32 + 02] = √34
A unit vector in the xy-plane that is perpendicular to 3i - 5j + k is:
u = v / llvll = (5/√34)i + (3/√34)j + 0k
Answer: A. It Is the specific idea the passage focuses on.
Explanation: The specific notion that a passage concentrates on is the primary idea of that passage. It is the most essential idea in the passage that the author discusses. It frequently appears in the first few paragraphs of the passage and is repeated at the end. The fundamental idea provides the paragraph meaning and direction, and it is frequently mentioned in other parts of the piece for clarification.
Answer:
The repetition of the "s" sound in line 4 creates a soft sound that represents regular life in contrast to the exciting sounds of war.
Explanation:
Alliteration is the repetition of sounds or letters at the beginning of words that are close to each other in a structure. In this excerpt, we can find alliteration with the sounds /b/ and /s/.
The two options that refer to the alliteration of /b/ are incorrect. It does not create an exciting nor a soothing sound. Quite the opposite, the purpose is to remind us of bombs and explosions, of violence and death.
As for the options concerning the /s/ sound, the only correct one is letter D. The repetition of the "s" helps the imagery in the poem. Its sound is soft, especially when opposed to the sound of shots and explosions. The same way, the scholar studying is a peaceful image, while the war, the invasion, the death previously described is anything but.
