Jump to content

jrv12

Members
 View Profile  See their activity

  • Posts

    55

  • Joined

  • Last visited

 Content Type 

Blog Entries posted by jrv12

  1. jrv12

    Spill Proof Mug

    By jrv12,

    The other day I came across something talking about a spill proof mug. Since I do tend to spill drinks occasionally, I wanted to read about it.
    The cup uses a suction on the bottom of it to help prevent it from tipping over. Once the mug forms a seal with the surface it is on, the air pressure under it becomes smaller than the atmospheric pressure above the cup, resulting in the downward force keeping the cup on the table. Even when a small force is applied to the top of the cup that would usually tip the cup over, the suction on the bottom of the cup keeps the cup upright. 
    Here’s a picture of the forces acting on the mug to keep it upright:
     
     
     
     
  2. jrv12

    Jet Stream

    By jrv12,

    When I flew to California and back last month, I noticed that it took more time to fly to California than it did to fly back to Rochester (even though it seemed shorter to fly to California because of the time zone difference). This happens as a result of the jet stream.
    The jet stream is a strong and narrow air current the circles the globe flowing from West to East. Jet streams occur because of the heating of the atmosphere from solar radiation and the Coriolis effect from the Earth’s axis of rotation. Jet streams are used to help aid in weather prediction, because the jet stream causes a lift of moisture in the air, which causes snow to form. Places directly below the jet stream will generally see more snow than other areas. Airlines also take into account the jet stream to predict the arrival times of flights so that passengers don’t miss their next flights. Turbulence on airplanes is also caused by the jet stream, but it doesn’t harm or affect anything directly.
    Here's an example of how the jet stream can affect the weather:

  3. jrv12

    The Magnus Effect

    By jrv12,

    The Magnus effect happens to a spinning object that drags air faster on one side, which causes the object to move in the direction of the lower-pressure side.
    Here’s a video showing the Magnus effect in action:
     
    Newton’s third law helps to prove the Magnus effect because the object pushes the air in one direction and the air pushes the body in the other direction, an action-reaction force. With a ball spinning through the air, some of the air spins around the ball with it. The side of the ball traveling into the air slows down the airflow, while the other side of the ball increases the airflow. A greater pressure on the side of the ball with the slow air pressure causes the ball to move in the opposite direction – toward the lower pressure.
  4. jrv12
    Video 1
    a.    4 beliefs that make people stupid:
    ·      Learning is fast
    ·      Knowledge is composed of isolated facts
    ·      Being good at a subject is inborn talent
    ·      I’m good at multitasking
    b.   I tend to try to multitask while doing homework by checking my phone every once and a while, but then I have to go back and reread so in the end it actually takes longer
    c.    Metacognition: A student’s awareness of their level of understanding of a topic
     
    Video 2
    a.    Most important factor in successful learning: what you think about while studying
    b.   Deep processing: matching new information with already learned information and comparing and contrasting the two
    c.    4 items that help learning:
    ·      minimizing distractions – don’t have my phone right next to me while trying to do homework
    ·      developing accurate metacognition – don’t overestimate the amount of material that I actually know and instead take the time to learn what I don’t know
    ·      deep processing of critical concepts – don’t just skim through something just to get it done and instead relate it to something I already know
    ·      practicing retrieval and application – quiz myself on the new material after I have finished learning it
     
    Video 3
    a.    6 aspects of optimizing learning:
    ·      elaboration – relate this concept to other concepts not only taking notes on the one video but relating it to things learned in other videos
    ·      distinctiveness – prove how this concept is different from other concepts by knowing the difference between integrals and derivatives
    ·      personal – relate this concept to personal experiences by forming the weekly blog posts on something I find interesting
    ·      retrieval and application – use and apply this concept within the weekly blog posts and webassign
    ·      automaticity – practice information so it occurs without conscious effort by writing equations without having to look at the reference table
    ·      overlearning – study beyond just knowing information so it can be recalled quickly by looking over notes again before answering questions so I don’t have to constantly look back at them
     
    Video 4
    a.    6 questions from the video:
    ·      What is metacognition?
    A student’s awareness of their understanding of a topic ·      How did the teacher test for metacognition?
    The teacher created a graph of the grades the students thought they would get vs. the grade they actually received and it showed that most students have poor metacognition ·      How does poor metacognition hurt academic success?
    You might overestimate how well you know something and then get a bad grade ·      Why would metacognition that was good in high school be bad in college?
    In college you have to apply knowledge to situations, whereas in high school you are mostly memorizing facts ·      What are the central differences between deep and shallow processing?
    Deep processing is applying and relating information to something already learned, shallow processing is merely memorization ·      Name a task you already do where you automatically use deep processing?
    Reading and annotating a book b.   In video lessons, it is hard to write down everything the instructor is saying word for word, so instead it is better to listen and then summarize what was said with an example to recall for later use. Taking notes on the video engages you by intently listening and processing what is being said in order to fully understand the content. It is also important to create sections and title the notes so that you know exactly where to go back and look for a certain topic.
    c.    A study group would obviously be of use in this class and most classes because others can help you learn information you don’t know and sometimes teaching is one of the best ways to learn!
     
    Video 5
    a.    What to avoid if an exam goes poorly: panicking and going into denial
    b.   What to do if an exam goes poorly: examine how you prepared, review the exam, talk with the teacher, examine your study habits and if they are effective, and develop a plan for the next exam
    c.    Helpful strategies to raise your grade: commit time and effort, minimize distractions, attend class, set realistic goals, don’t begin to slide or slack off, and don’t give away points
  5. jrv12

    Air Resistance Tests

    By jrv12,

    Last night my younger brother was watching one of his favorite shows: street science. I happened to walk in the room as they were doing a Galileo-inspired experiment where they were dropping different objects from a crane to show the effects of gravity and air resistance.
    At first, they dropped a basketball and a bowling ball from a height of 50 feet. Physics tells us that both objects should hit the ground at the same time because in free fall the weight of the object doesn’t matter. However, the bowling ball hit the ground before the basketball, showing the effects of air resistance. Next, they dropped two bowling balls from the same height but with different weights. They wanted to show that, while the shapes of the balls were the exact same, they still wouldn’t land at the same time. They heavier bowling ball took less time to hit the ground than the lighter one, but they were closer in time than basketball and bowling ball were. Finally, they dropped a truck and a refrigerator from a height of 50 feet. They hit the ground at the same time because in that little of a height with that much weight, air resistance does not have much of an effect. If the truck and fridge were dropped from much higher, they would not have hit the ground at the same time because of air resistance. It was pretty interesting to watch the effects of air resistance on different objects!

Terms of Use

The pages of APlusPhysics.com, Physics in Action podcasts, and other online media at this site are made available as a service to physics students, instructors, and others. Their use is encouraged and is free of charge. Teachers who wish to use materials either in a classroom demonstration format or as part of an interactive activity/lesson are granted permission (and encouraged) to do so. Linking to information on this site is allowed and encouraged, but content from APlusPhysics may not be made available elsewhere on the Internet without the author's written permission.

Copyright Notice

APlusPhysics.com, Silly Beagle Productions and Physics In Action materials are copyright protected and the author restricts their use to online usage through a live internet connection. Any downloading of files to other storage devices (hard drives, web servers, school servers, CDs, etc.) with the exception of Physics In Action podcast episodes is prohibited. The use of images, text and animations in other projects (including non-profit endeavors) is also prohibited. Requests for permission to use such material on other projects may be submitted in writing to info@aplusphysics.com. Licensing of the content of APlusPhysics.com for other uses may be considered in the future.

APlusPhysics Books

APlusPhysics Books

×
×
  • Create New...