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Tag: Physics Analysis

  • [Solved] Physics – Electrostatics

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    discussion- An enormous amount of electricity is created at power-generating stations and sent across the country through wires that carry high voltages. Appliances, power lines, airport and military radars, substations, transformers, computers, and other equipment that carries or uses electricity a…

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    discussion- An enormous amount of electricity is created at power-generating stations and sent across the country through wires that carry high voltages. Appliances, power lines, airport and military radars, substations, transformers, computers, and other equipment that carries or uses electricity all generate electromagnetic fields.

    Many questions have been raised about how electromagnetic fields affect our bodies. Do they pose a public health risk? Perform an Internet search to find information about the effects of electromagnetic fields on public health. Then, discuss the pros and cons of using equipment that produces an electromagnetic field.

    Here is one authoritative source to get you started: [electromagnetic fields and public health.](http://redirect.platoweb.com/343342)

    ## **Double Helix Structure of DNA**

    This task connects the physics of electrostatics with molecular biology. Molecular biology is the study of the structure and function of the cell at the molecular level. DNA’s double helix structure consists of two strands held together by electrostatic forces. Do online research on electrostatics and molecular biology, and then answer the following questions. Here are two sources to start with:

    – [DNA](https://app.edmentum.com/redirect//343338) [Deoxyribonucleic Acid (DNA) Fact Sheet](https://www.genome.gov/about-genomics/fact-sheets/Deoxyribonucleic-Acid-Fact-Sheet)
    – [the structure and function of DNA](https://app.edmentum.com/redirect//343339) [The Structure and Function of DNA – Molecular Biology of the Cell – NCBI Bookshelf](https://www.ncbi.nlm.nih.gov/books/NBK26821/)

    ## **Part A**

    What is DNA and what is its role in life? List DNA’s four nucleotide bases.

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    ## **Part B**

    Explain DNA’s structure, specifically noting the role electric fields and forces play in it.

    15px

    ## **Electric Field of Dreams**

    In this activity, you will explore the relationship between the strength and direction of the electric field lines to the type of charge on a particle and its magnitude. You will also explore the interactions between two or more charged particles and observe their movement. To begin your activity, open the simulation: [Electric Field of Dreams](https://app.edmentum.com/redirect//343340).  [‪‪Electric field of dreams‬ 1.0.0-dev.10‬](https://contentstore.ple.platoweb.com/content/sharedmedia/phet_sims_batch1/electric-field-of-dreams/electric-field-of-dreams.html)

    Directions:

    At any time you may

    – click the Reset All button to reset all the settings;
    – click the Play/Pause button to pause or resume the motion; or
    – pause the motion and then click the Step button to observe the motion step-by-step.

    ## **Part A**

    To begin, click the Add button to add one object to the system. Observe the electric field around this charged object. You may move the object around the field by dragging it with your cursor. While the arrows indicate the direction of the electric field around the charge, the length of the arrows indicates the field strength. Based on your observations of the field, what is the charge on this object? Give your reasoning.

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    ## **Part B**

    Set the charged object in motion by dragging it and releasing it. What do you observe about the behavior of the field lines in the vicinity of the object?

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    ## **Part C**

    Add another charged object to the electric field by clicking the Add button again. What is the charge of this new object? Give your reasoning. What do you observe about the behavior of both the objects as well as the field lines in the vicinity of both the objects?

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    ## **Part D**

    Click the Remove button to remove one of these objects, and then click the Properties button to set properties for the next object you will add. Just change the sign of the charge to (+), then click Done. Click Add to add this new object to the field. Now what do you observe about the behavior of the two objects and the field lines that surround them?

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    ## **Part E**

    With the two oppositely-charged objects still in the field, apply an external field to the system: In the External Field box, simply drag the dot until it becomes an electric field vector in some direction. Observe, describe, and explain the behavior of the two objects.

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    ## **Electric Field Hockey** [‪‪Electric field hockey‬ 1.0.0-dev.10‬](https://contentstore.ple.platoweb.com/content/sharedmedia/phet_sims_batch1/electric-hockey/electric-hockey_en.html)

    In this activity, you will again explore the relationship between an electric field and charged particles in the field, but this time you’ll have a gaming challenge. To begin, open [Electric Field Hockey](https://app.edmentum.com/redirect//343341).

    Directions:

    On the control bar, make sure that the Puck is Positive and the Field boxes are checked. Also, make sure that the Practice option is selected.

    Your aim is to score goals by manipulating the black puck (test charge) into the blue-colored bracket (goal) on the right. Think smart and place positive source charges (red) and negative source charges (blue) in such a way that the black puck moves into the goal.

    Note that when you place a red, positive source charge in the hockey field, a red arrow appears on the black puck (test charge) showing the force the positive charge exerts on the puck. Similarly, when you place a blue, negative source charge in the hockey field, a blue arrow appears on the black puck (test charge) showing the force the negative charge exerts on the puck.

    ## **Part A**

    Place a red charge in the hockey field and click Start. In which direction do electric field lines point? In which direction does the black puck move? What conclusion do you draw from this movement?

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    ## **Part B**

    Click Reset and then click Clear. Now, place a blue charge in the hockey field and click Start. In which direction do electric field lines point? In which direction does the black puck move? What conclusion do you draw from this movement?

    15pxSpace used(includes formatting): 0 / 30000

    ## **Part C**

    Manipulate the mass of the puck by dragging the Mass bar to the right for increasing the mass and to the left for decreasing it. What changes do you see in the speed of the puck? Which principle works behind this change?

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    ## **Part D**

    In the same situation, what do you observe about the relationship between the speed of the black puck and its distance from the blue charge?

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    ## **Part E**

    You can make the puck travel in complex ways by placing a set of charges around on the field. So, here’s your game challenge: Arrange source charges around to propel the puck from its starting position into the goal. That’s pretty easy for a straight shot; you just put a negative charge behind the goal. But what if there are barriers in the way? That’s a real test of your physics understanding, including Newton’s laws of motion and electrostatic forces. Game’s on!

    On the control bar, check the Trace, Field, and Anti-alias boxes. The game has three Difficulty levels. Start with Difficulty level one and arrange source charges to get the puck into the goal. Once you’ve made a score at any level, increase the Difficulty level. Take a screen capture of two of your most difficult goals and paste them here. At least one of these should be at Difficulty level 2 or 3.

    (Note: On a Windows computer, you can use the key combination Alt-Print Screen to copy the currently-active window to your clipboard. When you capture an image of this simulation window, paste the image into an image-processing program such as Paint, and save the image as a file. Then use the Insert Image button to insert the file into the response area.)

    15pxSpace used(includes format

    – 2 years ago
    – 23.5

  • [Solved] Physics – circuitry

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    Discussion- It’s possible to save a great deal of electrical energy (and money and natural resources) with some simple changes in household electrical use. The trouble is that most of these changes mean either changing behavior or spending money. Do an Internet search and review a few ways to save e…

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    Discussion-   It’s possible to save a great deal of electrical energy (and money and natural resources) with some simple changes in household electrical use. The trouble is that most of these changes mean either changing behavior or spending money. Do an Internet search and review a few ways to save electrical energy. Discuss at least one change that you think would be reasonable and worthwhile to do in your own home in the next year. Provide your rationale.

    ## **Home Energy Use**

    In this activity, you are going to perform an experiment to track the amount of power you and your family use, then look at some basic patterns in that usage. (NOTE: If you live in an apartment or home in which you do not have access to the electrical meter, consult with your instructor about alternative arrangements, like teaming with a classmate to gather this data.)

    This experiment is going to span the course of a full week and require 12 meter readings. It really involves two separate experiments:

    – tracking daily energy use for a week to compare any usage variations from day to day
    – comparing a single high-usage time period of a few hours with a single low-usage time period of a few hours to help you identify the extremes in your household electrical use

    You can easily do both experiments during the same time period. This approach would be the easiest and fastest way to proceed. Read the instructions for both Part A and Part B if you wish to do both experiments at the same time.

    To begin, you’ll need to find your electric meter, which could be inside or outside of your home. Many electric meters these days are digital and pretty easy to read, but if you have an older “dial-type” meter, go to this [electric meter reading guide](https://app.edmentum.com/redirect//355486) to learn about how to read and understand it.

    For each of the two experiments below, you will first record three simple pieces of data in a table:

    1) day and date, 2) time, and 3) the kWh reading from the meter.

    Then record the results of three simple calculations:

    – kWh used: Calculate kWh used since the last reading (subtraction).
    – Hours elapsed: Calculate the number of hours since the last reading (subtraction rounded to a whole number).
    – Average kW used: (kWh used)/(hours elapsed). If this number turns out to be 0.36, for example, it means that your average household power usage for the time period was about 360 watts, the equivalent of running six 60-watt bulbs for that whole time period.

    ## **Part A**

    Daily Electrical Usage: Data Collection

    Pick a convenient time of day to take readings from your electric meter. You’ll need readings roughly a day apart, but if they differ by only an hour or two, that should be fine. Pick a consistent time you’ll remember, though, such as after getting home for the day. You need to start by doing an initial meter reading, then follow up with a reading every day for the next 7 days. You’ll do 8 readings in all.

    Record your readings in the tables below. In addition to the data fields described above, there is a lot of room for usage notes. Record anything that might have substantially affected the electrical usage since your previous reading. This might include the amount of time people were around and awake at home, use of specific devices such as an air conditioner, clothes dryer, TV, or lighting.

    Type your response here:

        Initial Reading

    day & date

    time

    kWh reading

        Day 1                Data Usage notes (since last reading)

    day & date

    time

    kWh reading

    kWh used

    hours elapsed  '

    avg. kW used

        Day 2                        Data Usage notes (since last reading)

    day & date

    time

    kWh reading

    kWh used

    hours elapsed

    avg. kW used

        Day 3                          Data Usage notes (since last reading)

    day & date

    time

    kWh reading

    kWh used     '

    hours elapsed

    avg. kW used

        Day 4                                Data Usage notes (since last reading)

    day & date

    time

    kWh reading

    kWh used

    hours elapsed

    avg. kW used

              Day 5 Data                 Usage notes (since last reading)

    day&date

    time

    kWh reading

    kWh used

        hours elapsed

    avg. kW used

    Day 6           Data                   Usage notes (since last reading)

    day & date

    time

    kWh reading

    kWh used

    hours elapsed

        avg. kW used

    Day 7 Data                                                                Usage notes (since last reading)

    day & date

    time

    kWh reading

    kWh used

    hours elapsed

    avg. kW used

    10ptSpace used('includes formatting): 4030 / 30000

    ## **Part B**

    Usage Extremes: Data Collection

    For this experiment, you’ll measure electrical usage during a time period when you expect to have very light electrical usage (for instance, while you’re asleep at night or during the day when no one is at home). Likewise you’ll measure electrical usage during a time period when you expect to have heavier than average electrical usage. This time period might be in the evening, when lights and other appliances are on. Both of these time periods should be at least 4 hours long, to increase the accuracy of your results.

    Record your results in the tables below for each situation. For each time period, you’ll need to take an initial and a final reading.

    Type your response here:

         Low Usage – Initial Reading

    day & date

    time

    kWh reading

    Low Usage – Final Reading                             Energy Usage Notes

    day & date

    time

    kWh reading

       kWh used

    hours elapsed

    avg. kW used

    High Usage – Initial Reading

    day & date

    time

    kWh reading

    High Usage – Final Reading                       Energy Usage Notes

    day & date

    time

    kWh reading

    kWh used

    hours elapsed

        avg. kW used

    10ptSpace used(includes formatting): 1981 / 30000

    ## **Part C**

    Let’s start the analysis by looking at your “extreme usage” cases. Compare the two cases in detail—low usage period versus high usage period. Discuss differences between the two as well as any surprises. Things you should cover in your discussion: How much difference was there in average power usage (avg. kW) between the low-usage and high-usage time periods? What might have been running during the low-usage period that used energy? Identify likely “stealth” energy users that you could not turn off during the low-usage period. What do you suppose contributed most to the usage during the high-usage period?

    15pxSpace used(includes formatting): 0 / 30000

    ## **Part D**

    Having looked at your “extreme usage” cases, analyze your day-to-day usage. Discuss in detail. Specifically, compare higher usage days to lower usage days. Were there significant variations? Do your conclusions regarding the “extreme” cases help to explain any daily variations? What were the surprises or new insights you had in reviewing this day-to-day usage record?

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    ## **Part E**

    It is possible to save a great deal of electrical energy (and money and natural resources) with some simple changes. You’re probably familiar with what some of those changes are and are now more attuned to your own electrical usage. The trouble is, most of these changes either mean changing behavior or spending money. Search the Web for a few ways to save electrical energy. Record them below and categorize them, if possible, as “change behavior” or “spend money.” You might want to consider adding a “neither” category. There are a few things that don’t really require much change or money at all. Include your sources in your answer.

    15pxSpace used(includes formatting): 0 / 30000

    ## **Part F**

    Based on what you’ve learned from your household energy investigation, which of these methods seems reasonable to do in your own home _this year_? (Do you plan to do it?) Provide your rationale.

    15pxSpace used(includes formatting): 0 / 30000

    ## **What Is “Wasted” Electrical Energy?**

    Discuss the production, transmission, and usage of electricity in the context of conservation of energy. When electricity is “used” or we say that energy is “wasted,” what is actually happening?

    15px

    ## **Electrical Safety Devices**

    Perform an Internet search to learn about grounding wires, fuses, and circuit breakers. Specifically,

    – describe how each device works; and
    – relate its function to what you’ve learned in this unit about electric current, voltage and resistance.

    – 2 years ago
    – 22.5

  • [Solved] Lorem, Ipsum

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    [>Astronomy homework help](https://www.sweetstudy.com/fields/physics-astronomy) Supported file types: jpg, png, pdf, doc, xls – 2 years ago

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    [>Astronomy homework help](https://www.sweetstudy.com/fields/physics-astronomy)

    Supported file types: jpg, png, pdf, doc, xls

    – 2 years ago

  • [Solved] help

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    i will inbox instructions – 2 years ago

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    i will inbox instructions

    – 2 years ago

  • [Solved] Physics Help with physiology homework

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    Write a summary of chapter 5, choose a company related to the chapter and analyze the similarities and differences between the elements and chapter 5 in PowerPoint. [block blast unblocked](https://blockblastunblocked.io/) – 2 years ago

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    Write a summary of chapter 5, choose a company related to the chapter and analyze the similarities and differences between the elements and chapter 5 in PowerPoint.

    [block blast unblocked](https://blockblastunblocked.io/)

    – 2 years ago