Show that the quantity has the dimensions of length, where the surface tension has units of
Question:
Show that the quantity
has the dimensions of length, where the surface tension σ has units of energy per unit area. Look up the surface tension of water and evaluate l for water. When a small drop of water is placed on a porcelain surface it forms a round bead, but as the drop gets bigger, it flattens out. Explain what l has to do with this. Does the value of l agree with your experience?
σΙpg ||
Step by Step Answer:
energyarea mt 2 ml 3 and g lt 2 so For water at 25 C76 10 3 Jm 2 so If ...View the full answer
Related Video
The property of the surface of a liquid that allows it to resist an external force, due to the cohesive nature of its molecules. The cohesive forces between liquid molecules are responsible for the phenomenon known as surface tension. The molecules at the surface of a glass of water do not have other water molecules on all sides of them and consequently, they cohere more strongly to those directly associated with them (in this case, next to and below them, but not above). is not really true that a \\\"skin\\\" forms on the water surface; the stronger cohesion between the water molecules as opposed to the attraction of the water molecules to the air makes it more difficult to move an object through the surface than to move it when it is completely submersed
Students also viewed these Physics questions
-
The quantity h/m0c, which has the dimensions of length, is called the Compton wavelength for (a) An electron, (b) A proton. (c) Show that if a photon has wavelength equal to the Compton wavelength of...
-
The quantity h/mc, which has the dimensions of length, is called the Compton wavelength. Determine the Compton wavelength for (a) An electron, (b) A proton. (c) Show that if a photon has wavelength...
-
Show that the quantity h2/I have units of energy.
-
In Exercises 1 through 28, differentiate the given function. y = 2x
-
The article "Characterization of Highway Runoff in Austin, Texas, Area" (J. of Envir. Engr., 1998: 131-137) gave a scatter-plot, along with the least squares line, of x = rain-full volume (m3) and y...
-
Each of the following companies except ___________ was once a monopsony. a) General Electric c) R.J. Reynolds b) J. P. Stevens d) AT&T
-
Describe some of the decision errors and biases. How do managers reduce errors and biases in their decisions?
-
Bagels, Inc., produces and sells 20 types of bagels by the dozen. Bagels are priced at $6.00 per dozen (or $0.50 each) and cost $0.20 per unit to produce. The company is considering further...
-
Year 3 Cost of goods sold Ending inventory $ 618,825 98,900 Year 2 $ 401,650 Year 1 89,250 $366,300 94,000 Use the above information to compute inventory turnover for Year 3 and Year 2, and days'...
-
An analog electrocardiogram (ECG) signal contains useful frequencies up to 100 Hz. (a) What is the Nyquist rate for this signal? (b) Suppose that we sample this signal at a rate of 250samples/s, what...
-
Estimate the power output possible for a hydroelectric dam with hydraulic head Z = 30 m, flow rate Q = 300 m 3 /s, and turbine efficiency 90%.
-
Use dimensional analysis to determine the dispersion relation (k) for surface tension waves (up to a multiplicative constant), which can only depend on the surface tension , the density , and the...
-
Consider a system consisting of four processes and a single resource. The current state of the claim and allocation matrices is: What is the minimum number of units of the resource needed to be...
-
provide a brief recommendation for your client. (my client is tim hortons ) i want answer based on tim hortons Describe 3 areas of concern about your client's customer service that you will tackle...
-
Three Peer Reviews In this forum, you have two duties. 1. Post a copy of your rough draft in the text box of this forum You will be forgiven for any formatting issues this creates. 2. Write three...
-
Interview the person you chose about your differences with the goal of learning more about their point of view. Remember that you're not here to argue with someone or convince them that they're...
-
Write a C++ program that simulates a calculator. Outline the necessary components for your calculator. Ask "What is it doing?" Define the necessary variables to accomplish this task. Have your...
-
Which of the two strategies for finding jobsthe career network or the cold leads strategyis most likely to help you on your own personal journey? Which of these two feels more comfortable to you? In...
-
1. Both the video and the case written to accompany it consistently use the terms team or teamwork. In Chapter 10, we use four criteria to characterize a team as a small number of people with...
-
What is the difference between direct materials and indirect materials?
-
An AM modulator has output x c (t) = 40 cos [20(200)t] + 5 cos[2(180)t] + 5 cos[2(220)t] Determine the modulation index and the efficiency.
-
Rework Problem 3.8 for the message signal m(t) = 9 cos(20t) + 8 cos(60t) Data from Problem 3.8 (a) Write the equation for m n (t), the normalized signal with a minimum value of -1. (b) Determine {m 2...
-
An AM modulator operates with the message signal m(t) = 9 cos (20t) - 8 cos (60t) The unmodulated carrier is given by 110 cos(200t) and the system operates with an index of 0.8. (a) Write the...
-
Sapsora Company uses ROI to measure the performance of its operating divisions and to reward division managers. A summary of the annual reports from two divisions is shown as follows. The companys...
-
The company applies overhead cost to jobs on the basis of machine-hours. For the current year, the company estimated that it would work 42,000 machine-hours and incur $191,100 in manufacturing...
-
Explain performance management and the roles it plays within an organization. Describe a performance appraisal process and assess the importance of performance appraisals in an effective performance...
Study smarter with the SolutionInn App