Briefly describe what a wavefunction is. Use the term “boundary condition” in your answer. State 2 properties of wavefunctions. Give 2 examples of physical systems that would be described by wavefunctions.
In: Physics
Briefly describe what a wavefunction is. Use the term “boundary condition” in your answer. State 2 properties of wavefunctions. Give 2 examples of physical systems that would be described by wavefunctions.
In: Physics
In: Physics
1. Are there conditions under which the incident light ray undergoes reflection but not transmission at the boundary? If so, then what are those conditions?
2. Are there conditions under which the incident light ray undergoes transmission across the boundary without actually bending (or refracting)? If so, then what are those conditions?
3. The amount of light that undergoes reflection or transmission is demonstrated by how bright the reflected or transmitted ray is. Under what conditions is the amount of transmission maximized and the amount of reflection minimized?
4. What affect does an increase in the angle of incidence have upon the angle of reflection? 5. What affect does an increase in the angle of incidence have upon the angle of
In: Physics
Heat Transfer in a Steel Pan A medium sized steel pan is used to boil water on top of an electric range. Approximately 85% of the 1000 W produced by the heating unit is transferred nearly uniformly into the pot during use. Express the most appropriate form of the heat diffusion equation that describes the heat transfer through the bottom section of the pan. Include all relevant boundary conditions. The bottom section of the pan has a thickness of 0.5 cm and has a diameter of 20 cm. Justify the your choices. Clearly state all assumptions – boundary conditions, materials properties, etc. Please include a control volume sketch with you justification.
In: Physics
Consider a high-speed subsonic wind tunnel. The conditions in the large-diameter section upstream of the test section are V = 228 mph and T = 540°R. At the test section, the temperature is 473°R and the pressure is 2 atm. (a) If a wind tunnel model, placed in the test section, has a wing chord of 12 in., what is the test Reynolds number based on that chord? (b) What is the overall smooth flat-plate skin friction coefficient of the model wing if the boundary later is turbulent? (c) Determine the boundary layer thickness at the trailing edge of the model wing. (d) Calculate the skin friction drag in pounds for a model with a span of 3 ft.
In: Mechanical Engineering
A TV company is interested in the people watching their period drama show “Downtown Castle” that is set in the early 1900s. They found an overall F-statistic suggesting that together, age and hours of free time significantly predicted the number of episodes of Downtown Castle that people watched in a sample of 30. The slope coefficient for age was 4.5, with a standard error of 2.5
Question1
Based on the Downtown Castle model, calculate the upper boundary of the 95% confidence interval for the age slope coefficient. You can select the critical t-value from the table.
Question2
Based on the Downtown Castle model, calculate the lower boundary of the 95% confidence interval for the age slope coefficient.
In: Statistics and Probability
(a) Under what condition, does the angular momentum become a good quantum number? (Explain your answer with the mathematical description.)
(b) In that case, what do Hamiltonian and angular momentum operators share? (Briefly explain why you came up with the answer)
(c) In general, boundary conditions give discrete eigenvalues. What is the 'boundary condition' for a rotation problem? (What is the physical reason for discrete angular momentum values?)
(d) Can you explain why the orbital angular momentum operator cannot have half-integer eigenvalues?
(e) Based on your answer for (d), can you find the meaning of 'half-integer' spin quantum number?
In: Physics
1. Are there conditions under which the incident light ray undergoes reflection but not transmission at the boundary? If so, then what are those conditions?
2. Are there conditions under which the incident light ray undergoes transmission across the boundary without actually bending (or refracting)? If so, then what are those conditions?
3. The amount of light that undergoes reflection or transmission is demonstrated by how bright the reflected or transmitted ray is. Under what conditions is the amount of transmission maximized and the amount of reflection minimized?
4. What affect does an increase in the angle of incidence have upon the angle of reflection? 5. What affect does an increase in the angle of incidence have upon the angle of
In: Physics
A uniform board of length L=.75m is sliding along a smooth, frictionless horizontal plane. The board slides across a boundary with a rough horizontal surface. The coefficient of kinetic friection between the board and another second surface is μk= .31. The board has an initial speed of v=2.5m/s. How far past the boundary is the left end of the board when the board comes to rest? The answer was .654m, but I'm not getting any answer close to it, please help!
Can't get a good picture to post, but here's the link to one (just the picture not the questions):
https://d2vlcm61l7u1fs.cloudfront.net/media/5f3/5f379a04-82e2-4606-a5df-290b079863c0/php4injpw.png
In: Physics