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Author Archives: Anonymous

Semiconductor lasers used in optical storage productsrequire…

Semiconductor lasers used in optical storage productsrequire higher power levels for write operations than for read operations.  High-power-level operations lower the useful life of the laser.  Lasers in products used for backup of higher-speed magnetic disks primarily write, and the probability that the useful life exceeds five years is 0.95. Lasers that are in products that are used for main storage spend approximately an equal amount of time reading and writing, and the probability that the useful life exceeds five years is 0.995. Now assume 25% of the products from a manufacturer are used for backup and 75% of the products are used for main storage.What is the probability that the useful life of a laser exceeds five years? What is the probability that a laser that failed before five years came from a product used for backup?

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An ideal gas is compressed isothermally.  The change in entr…

An ideal gas is compressed isothermally.  The change in entropy for this process is

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A 1 kg block of ice at 0.00°C is thrown into a swimming pool…

A 1 kg block of ice at 0.00°C is thrown into a swimming pool at 22.0°C and melts (assume all the melted ice becomes water at exactly 0°C). If the pool remains at 22.0°C, calculate the change in entropy of the ice. Calculate the solution in J/K.  Type only the number part of the answer – do not include units.  Include negative signs where appropriate.   specific heats.JPGLatent Heat.JPG 

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Mark each as Completed (Yes – Completed) or Not (No – Not co…

Mark each as Completed (Yes – Completed) or Not (No – Not completed):**   You must show the formula sheet and scratch paper at the end of the test on camera: [show-scratch] Rip the formula sheet and scratch paper on camera. Show the ripped pages on camera: [rip-paper] Clear the calculator (memory) on camera: [RAM-cleared] Instructions  on how to Clear RAM (TI-84 Plus family calculators) This will delete programs that you may have stored, and all data in RAM memory: Press 2nd ; mem; 7; Reset, to highlight the RAM menu Select 1: All RAM… At the RESET RAM screen, select 2: Reset When complete, the display will show RAM Cleared Show the “memory cleared or RAM cleared ” calculator screen on camera. I under stand that failure to follow this instruction will result in grade zero for the exam: [guidelines-followed]

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** Mark each as Completed (Yes – Completed) or Not (No – Not…

** Mark each as Completed (Yes – Completed) or Not (No – Not completed):** Clear the calculator (memory) before starting the exam on camera: [RAM-cleared] Instructions  on how to Clear RAM (TI-84 Plus family calculators) This will delete programs that you may have stored, and all data in RAM memory: Press 2nd ;mem; 7; Reset, to highlight the RAM menu Select 1: All RAM… At the RESET RAM screen, select 2: Reset When complete, the display will show RAM Cleared Show the “memory cleared or RAM cleared ” calculator screen on camera. Show  scratch paper and formula card clearly on camera and kept them in visible writing area entire exam: [scratch-formula] I under stand that failure to follow this instruction will result in grade zero for the exam: [guidelines-followed]

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B. Write down the Chinese characters for the following pinyi…

B. Write down the Chinese characters for the following pinyin. In the parentheses, write down the meaning in English. (40%) chéngjì tăoyàn mófàn zhàngfu qìguănyán chāoguò  

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There are make up exams and retests in this class.

There are make up exams and retests in this class.

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Mark each as Completed (Yes)  or Not (No)    Show a complet…

Mark each as Completed (Yes)  or Not (No)    Show a complete 360-degree scan of your work area, including the computer table, keyboard, underneath and around the table, and the entire room, showing everything clearly on camera while counting slowly to 30 out loud. Show the work area clearly during the room scan. This also ensures that your microphone is working: [scan-mic] Work area clear except scratch paper/calculator/pen only: [work-clear] Turn on your webcam in Honorlock to see myself on the screen [webcam-on] Powered off  your cell phone on camera: [phone-off] Keep the cellphone away from the testing area out of hands reach but visible on camera to ensure that you are not using it during the test. Using or checking phones or other electronic devices during the test is not permitted: [phone-away] Ensure your webcam is positioned to provide a clear, unobstructed view of your entire face, hands, and desk area as shown in the sample images in canvas at all times. Your full face must be visible at all times, and your eyes should remain focused on the screen throughout the exam, except when using scratch paper: [webcam-view] Suggestions that might help fitting everything into view, when using a laptop. Try slightly elevating your laptop If you have any thick books, sturdy boxes, binders, or even a shoebox, those could also work under your laptop, just make sure whatever you use is flat and steady.  This would help to get a wider angle that can capture both your face and your workspace. Use an external webcam if you have access to one. It gives more flexibility in positioning the camera. Angle your laptop screen back a bit more than usual to widen the view to ensure your face remains visible. Consider placing a mirror behind you if you’re unable to fit the desk on screen; this could help reflect your workspace while keeping your face in view. You can sit diagonally at the table to increase the distance between yourself and the camera. This can help ensure your face, hands, and desk area are visible in the frame, as required. Show that all other electronic devices are turned off and kept out of reach including additional monitors in the room. No other monitors in the work area: [devices-off] Students should simulate classroom testing condition by taking each exam at a desk or table. Tests should not be taken on a bed, couch, or other informal setting: [desk-chair] Take the exam in a well-lit room. A clear and well-lit image of the student’s face must be fully visible, and all sounds must be clearly audible at all times: [light-sound] No other persons should be present in the room during the exam : [no-persons] Make sure, before beginning the exam, all additional applications are closed, with the exception of Google Chrome. On Mac computers, this can be done by selecting the Apple icon at the top left of the screen and choosing Force Quit, while Windows users can close applications by right clicking the application icon and selecting Close: [apps-closed] Students may not cover/obstruct the camera lens, point the camera lens away from their face, or  blur the camera during the exam: [no-camera-block] You must also follow all the instructions provided in the online exam guidelines document throughout the exam. Failure to follow these instructions will result in grade zero for the exam: [guidelines-followed] I understand that failure to follow any of the above instruction is a scholastic dishonesty violation and will be referred to Dean of students office and Scholastic dishonesty will receive course grade F: [dos-grade]  

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Three point charges each equal to 10 microcoulombs are locat…

Three point charges each equal to 10 microcoulombs are located at x = 1m, x = 2m, and x = 3m, respectively, on the x-axis. What is the magnitude of the electric field at the origin? Show your work on camera after answering the question.  

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Which of the following correctly explains non-probability sa…

Which of the following correctly explains non-probability sampling? (Select all that apply.)

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