The frequency of a turning fork is 256 heartz when it is sounded with another turning fork three beats per second are heard when the second turning fork is loaded with a small quantity of wave and sounded again with the first turning fork again 3 beats per second are heard what is the frequency of the second turning fork ​

The statements that indicate an informal tone that is inappropriate for an academic paper are:

When you think about it, this poem is really crazy.

I can't believe that people think that this writer's talented.

This book should be avoided like the plague it's so bad.

Explanation:

Academic papers demand a more formal tone that confers more objectivity to them. They avoid using the first person, expressing subjective opinions, and using an overall informal, colloquial language. The purpose is to present information via an impersonal tone. Among the sentences we were provided for analysis, there are three that present a personal opinion of the speaker in quite a colloquial manner, using everyday language to convey a subjective perspective:

When you think about it, this poem is really crazy.

I can't believe that people think that this writer's talented.

This book should be avoided like the plague it's so bad.