Speed of Sound Pre-Lab
The three purposes of this lab are (1) to use resonance to determine the speed of sound in air
trapped within a closed tube from the wavelength and frequency of a set of tuning forks, (2) to
determine the speed of sound in air from room temperature, and (3) to determine the relationship
between wavelength and frequency when the speed of sound is held constant.
We know that the speed of a mechanical wave is set by the medium in which it travels. In this
case, the sound waves are traveling through a column of air inside the tube. They hit the water
boundary and reflect back through the air to the open end of the tube. Since they are traveling
through air the entire time, the speed is set by the air itself. The speed of sound in air can be
calculated with the equation Vsound = 331.5 m/s + (0.6 m/s/°C • Tempair).
The speed of sound waves (v) is related to the frequency (f) and wavelength (λ) by the wave
formula V = f λ. We also know that for a pipe filled with air, with one open end and one closed end,
a standing wave is possible if there is a node at the closed end and an antinode at (or near) the
open end. In this experiment, the ‘closed end’ corresponds to the surface of the water, and the
‘open end’ is always at the top of the tube. The apparatus allows you to change the length of the air
column by changing the water level. A tuning fork of known frequency (f) held near the open end
will be used to send sound waves down the pipe. When the water level is at a standing wave node,
the standing wave pattern is reinforced, and the sound intensity increases noticeably due to
resonance. We also know that sound is a mechanical wave; therefore, the speed of sound
depends on the properties of the air itself. The primary factor that determines the speed of sound
in air is the air temperature.
We also know the sound waves will resonate inside a closed tube when the length of the tube is
equal to ¼ λ. We can use the length of a column of air within a resonating tube to determine the
wavelength of the sound wave; and then, combine that with the frequency of the sound wave to
determine the speed of sound within the resonating tube.
1. Obtain a tuning fork. Record its known frequency.
2. Record the air temperature of the room.
3. Strike the tuning fork with the tuning fork hammer, a shoe with a rubber sole, or on a book. Do
not allow the ends of the fork to hit each other. Hold the tuning fork about 2 cm above the tube.
Slowly lower the water level until the sound is amplified. Move the water and down to be sure
to find the loudest point.
4. When the sound is at its loudest point, measure length (L), the distance from the top of the
water to the top of the tube. Convert this distance into meters and record your data.
Centimeters ÷ 100 = meters i.e. 15.5 cm = 0.155 m
5. Repeat steps 2-4 until you have tested 8 different tuning forks with different frequencies.
Always start with the water at its highest point. (You should do 512 Hz first and then do the
other tuning forks in order)
6. Calculate wavelength and velocity of sound by using the equations given in the data table.
Name Speed of Sound Pre-Lab
Hypothesis Statements: (Make a prediction statement and use a “because” statement to
justify your prediction)
1. Write a hypothesis statement about the relationship between the wavelength and frequency.
2. Write a hypothesis statement describing a wavelength vs. frequency graph. Describe the graph
in terms of “direct or indirect” and “linear or exponential”.
Understanding the Lab
In this lab we will be using two methods to determine the speed of sound in air. We will measure
the air temperature and we will use resonance within the tube.
1. Describe the factor(s) that determine the speed of a mechanical wave (in general – not just
sound waves). Give at least two examples to support your answer.
2. What single factor is most responsible for the speed of sound in air? Explain why.
3. In the space below draw a quick “sketch” of what you think the wavelength vs. frequency graph
will look like. Include a line/curve for each set of data. Briefly explain why you think it will take this

Get Professional Assignment Help Cheaply

Buy Custom Essay

Don't use plagiarized sources. Get Your Custom Essay on
Speed of Sound Pre-Lab Purposes
Just from $9/Page
Order Essay

Are you busy and do not have time to handle your assignment? Are you scared that your paper will not make the grade? Do you have responsibilities that may hinder you from turning in your assignment on time? Are you tired and can barely handle your assignment? Are your grades inconsistent?

Whichever your reason is, it is valid! You can get professional academic help from our service at affordable rates. We have a team of professional academic writers who can handle all your assignments.

Why Choose Our Academic Writing Service?

  • Plagiarism free papers
  • Timely delivery
  • Any deadline
  • Skilled, Experienced Native English Writers
  • Subject-relevant academic writer
  • Adherence to paper instructions
  • Ability to tackle bulk assignments
  • Reasonable prices
  • 24/7 Customer Support
  • Get superb grades consistently

Online Academic Help With Different Subjects


Students barely have time to read. We got you! Have your literature essay or book review written without having the hassle of reading the book. You can get your literature paper custom-written for you by our literature specialists.


Do you struggle with finance? No need to torture yourself if finance is not your cup of tea. You can order your finance paper from our academic writing service and get 100% original work from competent finance experts.

Computer science

Computer science is a tough subject. Fortunately, our computer science experts are up to the match. No need to stress and have sleepless nights. Our academic writers will tackle all your computer science assignments and deliver them on time. Let us handle all your python, java, ruby, JavaScript, php , C+ assignments!


While psychology may be an interesting subject, you may lack sufficient time to handle your assignments. Don’t despair; by using our academic writing service, you can be assured of perfect grades. Moreover, your grades will be consistent.


Engineering is quite a demanding subject. Students face a lot of pressure and barely have enough time to do what they love to do. Our academic writing service got you covered! Our engineering specialists follow the paper instructions and ensure timely delivery of the paper.


In the nursing course, you may have difficulties with literature reviews, annotated bibliographies, critical essays, and other assignments. Our nursing assignment writers will offer you professional nursing paper help at low prices.


Truth be told, sociology papers can be quite exhausting. Our academic writing service relieves you of fatigue, pressure, and stress. You can relax and have peace of mind as our academic writers handle your sociology assignment.


We take pride in having some of the best business writers in the industry. Our business writers have a lot of experience in the field. They are reliable, and you can be assured of a high-grade paper. They are able to handle business papers of any subject, length, deadline, and difficulty!


We boast of having some of the most experienced statistics experts in the industry. Our statistics experts have diverse skills, expertise, and knowledge to handle any kind of assignment. They have access to all kinds of software to get your assignment done.


Writing a law essay may prove to be an insurmountable obstacle, especially when you need to know the peculiarities of the legislative framework. Take advantage of our top-notch law specialists and get superb grades and 100% satisfaction.

What discipline/subjects do you deal in?

We have highlighted some of the most popular subjects we handle above. Those are just a tip of the iceberg. We deal in all academic disciplines since our writers are as diverse. They have been drawn from across all disciplines, and orders are assigned to those writers believed to be the best in the field. In a nutshell, there is no task we cannot handle; all you need to do is place your order with us. As long as your instructions are clear, just trust we shall deliver irrespective of the discipline.

Are your writers competent enough to handle my paper?

Our essay writers are graduates with bachelor's, masters, Ph.D., and doctorate degrees in various subjects. The minimum requirement to be an essay writer with our essay writing service is to have a college degree. All our academic writers have a minimum of two years of academic writing. We have a stringent recruitment process to ensure that we get only the most competent essay writers in the industry. We also ensure that the writers are handsomely compensated for their value. The majority of our writers are native English speakers. As such, the fluency of language and grammar is impeccable.

What if I don’t like the paper?

There is a very low likelihood that you won’t like the paper.

Reasons being:

  • When assigning your order, we match the paper’s discipline with the writer’s field/specialization. Since all our writers are graduates, we match the paper’s subject with the field the writer studied. For instance, if it’s a nursing paper, only a nursing graduate and writer will handle it. Furthermore, all our writers have academic writing experience and top-notch research skills.
  • We have a quality assurance that reviews the paper before it gets to you. As such, we ensure that you get a paper that meets the required standard and will most definitely make the grade.

In the event that you don’t like your paper:

  • The writer will revise the paper up to your pleasing. You have unlimited revisions. You simply need to highlight what specifically you don’t like about the paper, and the writer will make the amendments. The paper will be revised until you are satisfied. Revisions are free of charge
  • We will have a different writer write the paper from scratch.
  • Last resort, if the above does not work, we will refund your money.

Will the professor find out I didn’t write the paper myself?

Not at all. All papers are written from scratch. There is no way your tutor or instructor will realize that you did not write the paper yourself. In fact, we recommend using our assignment help services for consistent results.

What if the paper is plagiarized?

We check all papers for plagiarism before we submit them. We use powerful plagiarism checking software such as SafeAssign, LopesWrite, and Turnitin. We also upload the plagiarism report so that you can review it. We understand that plagiarism is academic suicide. We would not take the risk of submitting plagiarized work and jeopardize your academic journey. Furthermore, we do not sell or use prewritten papers, and each paper is written from scratch.

When will I get my paper?

You determine when you get the paper by setting the deadline when placing the order. All papers are delivered within the deadline. We are well aware that we operate in a time-sensitive industry. As such, we have laid out strategies to ensure that the client receives the paper on time and they never miss the deadline. We understand that papers that are submitted late have some points deducted. We do not want you to miss any points due to late submission. We work on beating deadlines by huge margins in order to ensure that you have ample time to review the paper before you submit it.

Will anyone find out that I used your services?

We have a privacy and confidentiality policy that guides our work. We NEVER share any customer information with third parties. Noone will ever know that you used our assignment help services. It’s only between you and us. We are bound by our policies to protect the customer’s identity and information. All your information, such as your names, phone number, email, order information, and so on, are protected. We have robust security systems that ensure that your data is protected. Hacking our systems is close to impossible, and it has never happened.

How our Assignment Help Service Works

1. Place an order

You fill all the paper instructions in the order form. Make sure you include all the helpful materials so that our academic writers can deliver the perfect paper. It will also help to eliminate unnecessary revisions.

2. Pay for the order

Proceed to pay for the paper so that it can be assigned to one of our expert academic writers. The paper subject is matched with the writer’s area of specialization.

3. Track the progress

You communicate with the writer and know about the progress of the paper. The client can ask the writer for drafts of the paper. The client can upload extra material and include additional instructions from the lecturer. Receive a paper.

4. Download the paper

The paper is sent to your email and uploaded to your personal account. You also get a plagiarism report attached to your paper.

smile and order essay GET A PERFECT SCORE!!! smile and order essay Buy Custom Essay