Students are sitting in a classroom and listening to a lecture. If the lecture has a...

Students are sitting in a classroom and listening to a lecture. If the lecture has a sound level of 65 dB to the student sitting in the front row, what is the sound level according to another student sitting 3 times further away?

Show all the steps.

Solutions

Expert Solution

Sound level of the lecture for the student sitting in the front row = ₁ = 65 dB

Sound intensity of the lecture for the student sitting in the front row = I₁

Distance of the student in the front row from the sound source = R₁

I₁ = 3.162 x 10^-6 W/m²

Distance of another student from the sound source = R₂

The other student is sitting 3 times further away.

R₂ = 3R₁

Sound intensity of the lecture for the other student = I₂

The power of the sound is distributed equally in all directions that is in a spherical manner therefore,

I₂ = 3.513 x 10^-7 W/m²

Sound level of the lecture for the other student = ₂

₂ = 55.45 dB

Sound level according to another student sitting 3 times further away = 55.45 dB

genius_generous answered 1 year ago

Next > < Previous

Related Solutions

Consider a group of people sitting in a classroom acting very much alike: listening to the...

Consider a group of people sitting in a classroom acting very much alike: listening to the professor, taking notes, raising a hand to ask an occasional question. Now consider the same group of people at the beach on a sunny afternoon – some are swimming and riding the waves, some are reading quietly under an umbrella, some are sleeping in the sun, some are watching people, some are running and laughing and wrestling in the sea. Using ideas from chapter...

You have a fellow student with a history of stress incontinence. While sitting in the classroom...

You have a fellow student with a history of stress incontinence. While sitting in the classroom someone states a funny joke and they start laughing so hard they “pee their pants”? What should be done to help this student? What is stress incontinence, the symptoms associated with it and who is at risk for having it? How do we treat this disorder?

As she sat in her Accounting I class bored while listening to the lecture on journal...

As she sat in her Accounting I class bored while listening to the lecture on journal entries, Annabelle could not imagine being an accountant in the future. As a young girl, she remembered sitting in the kitchen while her mom and aunts baked those delicious Jamaican black cakes. She remembered that the cakes sold very quickly especially at Christmas time and that people were traveling from as far away as Florida to buy them. Her mom learned to bake from...

There are 50 students in a classroom at UT-Almost. Thirty of these students started as freshmen...

There are 50 students in a classroom at UT-Almost. Thirty of these students started as freshmen at UTA; the rest are transfers. The transfer students are split evenly between business majors and liberal arts majors. the total number of business majors is 25. (use for both questions) #13 – If we randomly selected a single student, what is the probability he/she will be either a liberal art major or a transfer student? ANSWER: #16 – Suppose we randomly selected two...

Minimum of 10 classroom modifications for students with Down Syndrome Concepts to consider: Classroom technology Curriculum...

Minimum of 10 classroom modifications for students with Down Syndrome Concepts to consider: Classroom technology Curriculum Classroom library Language Class discussions Physical classroom environment Social classroom environment Teaching methods Materials Learning activities and tasks Level of input or assistance from teacher.

In a sample of 200 UM students, 170 students reported listening to Eminem daily. In a...

In a sample of 200 UM students, 170 students reported listening to Eminem daily. In a similar sample of 150 OSU students, 107 students reported listening to Lizzo daily. a. Do the same proportion of UM and OSU students listen to Lizzo every day? Test at 98% confidence b. If you want to create a 90% confidence interval with a margin of error of .09, and want to include 1.5 times as many OSU students as UM students, how many...

Do A students tend to sit in a particular part of the classroom? To answer this...

Do A students tend to sit in a particular part of the classroom? To answer this question, the locations of the students who received A grades was recorded. The results were that 17 sat in the front, 9 sat in the middle, and 5 sat in the back of the classroom. Test the claim that the A students are not evenly distributed throughout the classroom. What are the null and alternative hypotheses for this test? Provide the chi-square test statistic....

Let’s represent 61 students sitting in a row as a simple string, 61 characters long. Students...

Let’s represent 61 students sitting in a row as a simple string, 61 characters long. Students not wearing a mask are represented by the space character. Students wearing a mask are represented by an asterisk (*). On the first day, only one student, sitting in the middle of the row is wearing a mask. Our initial string looks like this: " * " Students will decide whether to wear a mask the next day according to the following rule: If...

There are 36 students in the classroom. Assuming each date of the year are equally likely...

There are 36 students in the classroom. Assuming each date of the year are equally likely to be the birthday of a student. Calculate the probability that there are at least two students having the same birthday. use probability and stats to solve

Ms. Brown is a teacher in a first-grade classroom. The students are not wanting to listen...

Ms. Brown is a teacher in a first-grade classroom. The students are not wanting to listen and are taking a very long time to clean the room between tasks. She wants to use praise and feedback as her behavior change tool. Taking what you know about reinforcement from this week's readings, how should she go about doing this? Explain your rationale. It is not always the case that people use reinforcement on purpose. Sometimes, the natural contingencies that follow a...

Subjects