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  1. E

    Can Newton's Laws of Motion be simplified?

    Thanks for that answer. Reading that gave me a kind of 'eureka!' moment.
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    Engineering Physics, Diff EQ, Matrix Algebra - too hard?

    I would have to disagree about the matrix algebra class, at least compared to my experience. At uvic, there are 2 matrix algebra/linear algebra courses, one is geared towards the engineers and IS primarily applied linear algebra, but the one that is required for physicists is very proof-based...
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    Engineering Physics, Diff EQ, Matrix Algebra - too hard?

    3 courses is considered a very easy semester
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    Simple argument that a force applied farther from the rotation axis

    Actually it does. If the NET force acting on an object does NONZERO work over a certain time or distance, that is equivalent to saying that the body accelerated. Consider a point mass where two forces are being applied on it, each in opposite direction but equal in magnitude. Using the same...
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    Projectile: know only launch velocity, max height, and distance

    If you are willing to assume initial launch height is zero or negligibly small... θ=(1/2)arcsin(g*x_max/v^2) =arcsin[sqrt(2*g*y_max)/v] t_flight=2*sqrt[2*y_max/g] Otherwise it's ugly. I see mathematics as both an enabler and a disabler, in your problem it is definitely the latter :(
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    Simple argument that a force applied farther from the rotation axis

    Let me try and justify this for you. Let f_2 be the force acting at greater distance from axis, and f_1 acting from the smaller distance. K=∫(ƩF dot dr) =∫((F_2-F_1) dot dr) =∫(F_2 dot dr)-∫(F_2 dot dr) Consider both of these forces acting tangentially and for a quarter revolution...
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    Newton's Cannon: Finding the displacement, velocity, acceleration

    I modelled something similar earlier this summer. The method I ended up using is really easy. Your program needs the inital x, y, and z components and the inital v_x, v_y, v_z components. For each time, you want to find what the acceleration is using a = (GM)/(x+y+z)^2. Once you have that...
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    Should I start my undergrad with Calc 3?

    If you have already taken Calc 1 and Calc 2, you should definitely register for multivariate calc. How were your marks in those classes?
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    Do I need to be a prodigy to succeed in physics?

    Haha I torture myself over the exact same issue on whether or not I have a mathematical mind. The proof in my textbook for it is entirely algebraic and doesn't make much intuitive sense as say, a graphical reason would.
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    Physics in a digital age.

    Actually it has everything to do with funding. Lots of people take first year physics, not many people take Quantum Mechanics II.
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    Physics in a digital age.

    The other option is basically learn from the textbook and/or online resources.
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    Physics in a digital age.

    My advice to you is to stop romanticizing your situation. The university system does not suffer from teaching in an ancient paradigm the way that high schools are criticized of doing. They are quite modern, but you will have to put up with a chalkboard. And if you think that's dull, try...
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    Force and point of application

    In A), you can't move the force to C, because then what force would supply the torque? In other words, torque costs force. But what I don't know is how much of the force is given to create rotational motion and how much is given to create linear motion. It certainly will depend on time. EDIT...
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    Questions about a particle shot off of a rotatiting disc.

    first of all, the accerlation the ball feels if it were to move in circular motion with radius (r/2) would be a = 2rw^2 second, if you drop ball directly onto the disc, ie. the trajectory of the fall is perpendicular to the plane of the disc, then the ball would not move, because you told us to...
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    Liquid Pressure at Depth

    No. For example, the area of a circle with radius r multiplied by a height h gives the volume of a cylinder with radius r and height h.
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    Are these overwhelming classes?

    I mean that those courses require a lot of time, regardless of whether you think the material is easy. But given the amount of time you say you're studying, you should be able to do it. However I noticed you didn't take into account labs. Expect to spend 5-10 hours on each lab.
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    Are these overwhelming classes?

    No he's not, because if you look at the prerequisites you'll notice they are second year physics courses.
  18. E

    Weight in an elevator, at terminal velocity

    The air is exerting a force that is equal and opposite to the force of gravity exerted on the elevator. However the speed of the air INSIDE the elevator RELATIVE TO YOU is so small that it would be unable to provide enough air resistance to stop your acceleration. As a result, the elevator stops...
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    Are these overwhelming classes?

    Your last semester looks challenging because you have 3 second year physics courses, which all have a heavy workload and require a large time investment for labs and write-ups. You are also going to be spending SO much time on the physics research course, with pressures of coming up with a...
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    Love Physics/Maths but procrastinating too much?

    Maybe try working outside of a 'schedule'. I get the most self-studying done when I just let my curiosity take me places. Yesterday I spent several hours rationalizing why the parallelogram with 2 non-parallel sides being the vectors a and b, is just the det(a,b). Today, I making a program that...
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    Courses Are computer science courses worth taking for physics?

    I have the option to take these two computer science courses. Would these courses be useful in my experimental-physics studies? My worry is that they would be too far theorized and that I wouldn't take anything out of the class that I could actually USE to do experimental-physics. If someone...
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    Physics Physics vs Medical field

    Regarding your religious beliefs: there is a small minority of physicists who subscribe to religion, although finding a religious biologist is very rare, and a religious evolutionary biologist even more rare. I'm telling you this more for interests sake than anything else.
  23. E

    Language to take. Latin?

    If you want to see what latin is like, watch the 'learning latin with virgil' video series on youtube.
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    About my thinking Kenetic E

    the kinetic energy of the falling object is constantly changing because its velocity is changing due to the acceleration due to gravity. You must specify at what location/time you want to know the object's kinetic energy.
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    How did you get into Astronomy/Astrophysics?

    I think its much more common for people to want to study galaxies and black holes then 'why bubbles go pop'. If you are unable to see their perspective on why they think its fascinating then you're close-minded.
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    Finding average speed on a velocity vs time graph

    Tell her the question is impossible to solve because she fails to include the velocity at t = 0 and 2 seconds of the time interval she's requesting.
  27. E

    One less lawyer in the world, one more scientist

    You'll definitely need another bachelor's degree. Because you already have one major, you'll likely be able to skip the graduating requirements and simply get through the specific program requirements. However, in the first few terms of your new program, your progress will be stagnant until you...
  28. E

    Some help with a personal project would be greatly appreciated

    I'm sure most people on this forum would like to make predictions on your 'what if' scenarios, I don't know if it will be allowed though. Some rules on this forum are rather strict, you'll have to wait and see
  29. E

    Definite Path of the Universe

    How can any of those things explain the emergence of life, or the fact that you and I are both conscious and self-aware?
  30. E

    Kind vs. Tough physics/math textbooks.

    What it really comes down is money. A first year calculus textbook will have lots of worked examples, diagrams, and graphs along with the text because Calculus I is a gateway class into a bunch of fields so lots of people take it, and so it receives more funding because it has more potential to...
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