What is Jump: Definition and 323 Discussions

Julia is a high-level, high-performance, dynamic programming language. While it is a general-purpose language and can be used to write any application, many of its features are well suited for numerical analysis and computational science.Distinctive aspects of Julia's design include a type system with parametric polymorphism in a dynamic programming language; with multiple dispatch as its core programming paradigm. Julia supports concurrent, (composable) parallel and distributed computing (with or without using MPI or the built-in corresponding to "OpenMP-style" threads), and direct calling of C and Fortran libraries without glue code. Julia uses a just-in-time (JIT) compiler that is referred to as "just-ahead-of-time" (JAOT) in the Julia community, as Julia compiles all code (by default) to machine code before running it.Julia is garbage-collected, uses eager evaluation, and includes efficient libraries for floating-point calculations, linear algebra, random number generation, and regular expression matching. Many libraries are available, including some (e.g., for fast Fourier transforms) that were previously bundled with Julia and are now separate.Several development tools support coding in Julia, such as integrated development environments (e.g. Microsoft's Visual Studio Code, with extensions available adding Julia support to IDEs, e.g. providing debugging and linting support); with integrated tools, e.g. a profiler (and flame graph support available for the built-in one), debugger, and the Rebugger.jl package "supports repeated-execution debugging" and more.

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  1. A

    Speculative Time Jump Question

    I'm sure this has been asked 1000 times before, but here's my shot: If I had a time machine and intantaneously 'jumped' 1 hour in the future, would I lose all my kinematic vector (velocity, acceleration) during my time jump? I read on another thread on PF that the Earth is moving roughly...
  2. G

    Finding the max range of a jump on the moon using kinematics

    Homework Statement A person can jump a maximum horizontal distance (by using a 45 ◦ projectile angle) of 4 m on Earth. The acceleration of gravity is 9.8 m/s 2 . What would be his maximum range on the Moon, where the free-fall acceleration is g 6 ? Answer in units of m...
  3. P

    Jump into the Field of Remote Control (RC): How Difficult?

    Since I last posted here, I've experimented with small DC motors, parallel and series circuits, messed with my electronic-building kit, and even did a little Job Shadowing (temporary internship) at a local electrical engineering place for school. I definitely want to make this into a profession...
  4. L

    Gravitational Potential Energy of a jump

    Homework Statement A high jumper of mass 60.0 kg consumes a meal of 3.00 x 10^3 kcal prior to a jump. If 3.3% of the energy from the food could be converted to gravitational potential energy in a single jump, how high could the athlete jump? Homework Equations Ug = mgh gravity =...
  5. R

    Bungee Jumping: Min Spring Constant to Support Jorge (75kg)

    Homework Statement Jorge is going to bungee jumpy from a bridge that is 55.0m over the river below. The bungee cord has an unstretched length of 27.0m. To be safe, the bungee cord should stop Jorge's fall when he is at least 2.00 m above the river. If Jorge has a mass of 75.0kg what is the...
  6. P

    Physics of Jumping: How Force Affects Height

    Hello there! I was thinking about jumping the other day. How would one explain jumping by physics. So, before you jump, you always bend your knees. This knee bending, from my point of view shouldn't be analogized with the build up elastic energy, since the force that will cause the jump...
  7. L

    How Much Force is Needed to Jump?

    If I wanted to know how much force is required to jump, and I know my acceleration while jumping, would I just use F=ma. Or do I need to account for gravity, as in use Fjump - Fg = ma
  8. M

    I would really like to get a jump on calculus before next semester

    I would really like to get a jump on calculus before next semester when I take calculus... The calc book that I am currently reading is ... https://www.amazon.com/dp/0486404536/?tag=pfamazon01-20 . I want another calc book to read to. I don't want calculus for dummies or any book like that... I...
  9. C

    Correct me if I am wrong, but atoms emit photons when they jump energy

    Correct me if I am wrong, but atoms emit photons when they jump energy levels. Right?
  10. M

    When the electrons in silicon are excited by visible light and jump

    When the electrons in silicon are excited by visible light and jump into the conduction band how do the electrons replace? So for example, wouldn't a solar cell only last for so long if all the valence electrons are excited and converted into current. I am looking at it as if all the valence...
  11. T

    Jump Over Log with Least Effort: Analyzing Velocity vs Angle

    1.A lazy flea approaches a stationary log with radius R. At what distance from the log must the flea be to jump over the log with the least amount of effort. Hint: Plot Velocity versus the angle. 2.(Not sure how I should type these) I plan to use constant acceleration projectile motion...
  12. K

    Julie's Jump: Solving Kinetic Energy & Internal Energy Problems

    Homework Statement Julie has a mass of 60 kg. In an experiment she crouched down, then jumped straight up. Her lab partners measured the height of her center of mass above the floor at three instants: 1) 0.43 m when crouched down; 2) 1.02 m just as her feet were leaving the floor; 3) the...
  13. JJBladester

    Triple jump - Impulse & Momentum

    Homework Statement The triple jump is a track-and-field event in which an athlete gets a running start and tries to leap as far as he can with a hop, step, and jump. Shown in the figure is the initial hop of the athlete. Assuming that he approaches the takeoff line from the left with a...
  14. P

    Speed - the bus jump in the movie

    Speed --- the bus jump in the movie! Homework Statement In the movie Speed1, a loaded city bus is rigged with an explosive that will detonate and kill everyone aboard if its speed goes below 50 miles per hour. As the bus is moving, the people on board are informed that a bridge ahead in the...
  15. T

    Projectile motion locust jump question

    Homework Statement A Locust can jump as far as 75 cm horizontally, given a 55° angle above horizontal, what is the initial velocity? Given: d=75cm (0.75m) Angle=55° Homework Equations a= v/t d=vt The Attempt at a Solution t = (v)sin55 / 9.81 t = 0.75 / (v)cos55 t = t...
  16. L

    Estimate the velocity achieved when you jump

    Homework Statement estimate the velocity you achieve when you jump straight up hint use the height you reach jumping on Earth to estimate the change in potential energy and then use conservation of energy to estimate you initial kinetic energyHomework Equations ymax=(v^2 sin^2 @)/2g The...
  17. M

    Athelete jump dimensional motion

    Homework Statement In the vertical jump, an athlete starts from a crouch and jumps upward to reach as high as possible. Even the best athletes spend little more than 1.00 s in the air (their "hang time"). Treat the athlete as a particle and let Y(max) be his maximum height above the floor...
  18. C

    How long does does it take for the probability cloud of an electron to jump?

    Me and a friend at school have been thinking about this question for a while and have come up with a few perspectives, I'm sure there's a 'proper' answer but I haven't managed to find one even after scouring numerous web pages. We are aware that the electron doesn't 'move' in a sense, only the...
  19. T

    How are jump discontinuities important when determining the area of a curve?

    Hi I'm a complete n00b at calculus (first day of the first year) so this question may appear a little...stupid. But I want to hammer into my head every little thing I hear in the lecture hall, so I might as well give it a go. Today the professor explained how jump discontinuities must be...
  20. M

    Is it possible for electricity to jump a vacuum gap?

    Is it possible for electricity to jump a vacuum gap? If so, what is it called when that happens?
  21. M

    Physics Everybody jump on the medical physics bandwagon

    Currently medical physicists especially fresh graduates are experiencing difficulty in landing jobs. But the future is bright, think about the population ages. If you enroll in med phys now, after 5 years (assume MSc and residency) the market will be back, and you will have a good career.
  22. H

    Can the Fosbury Flop Technique Overcome a Wall?

    It is said that jumping with the Fosbury Flop technique, one's center of mass stays significantly under the bar. What if, instead of the bar, one tryed to jump over a wall? It looks as though there's no difference between the bar and the wall, but the wall is a potential barrier for the center...
  23. G

    Ski Jump Problem: Verify if Tangent is <20º

    1. Homework Statement A ski jumper leaves the end of the slope, make a 35º with the horizontal and the slope making -45º with the horizontal. it has initial velocity of 8m/s. For him not to fall the tangent of the trajectory and the slope at the moment of impact should not be bigger then 20º...
  24. P

    How much force is required to jump?

    Hi there, I'm interested in the force required to jump. It's been a decade since physics, my old copy of Serway is 1,000 miles away, and I can't remember enough about solving the problem to put proper keywords into a Google search (yeah, it's pathetic). I remember enough about Newtonian...
  25. romsofia

    Do you jump higher when you run and jump, or just stand and jump?

    Hi, do you jump higher when you run and jump, or just stand and jump? I believe you jump higher if you run and jump.
  26. Q

    Why Does the Electron Jump Between Stationary States?

    I've been bothered by this question. Say we have an electron in it's ground state. According to quantum mechanics, that is a stationary state. Then we excite the atom and the electron jumps into a higher energy level. That is also a stationary state. The question is: Why does the electron jump...
  27. G

    Bungee Jump: 65 kg, 11m Rope, 36m Fall

    The girl is going on a bungee jump. She weighs 65 kg. The rope is 11m. In total, she fell 36 m. The first 11 m is free fall, and another 25m is simple harmonic motion. 1) k of rope 2)max spped 3)what point when she has max speed 4)amplitude of rope 5)how long does it take Homework...
  28. P

    Solve Physics Homework: Bunjee Jump Question

    Homework Statement A Year 12 Physics student has a mass of 85kg and is planning to bungee jump from a 200m high tower with a Killer Python Snake strapped to his ankles. The student decides to place his life in your hands and will totally rely on your knowledge of physics. He requests you to...
  29. F

    Solve Bungy Jump Problem: Acceleration at Bottom

    You go bungee jumping from a bridge that is 65m high, the bungee cord has an unstretched length of 32m and a spring constant of k=107 N/m You have a mass of 75kg. Question: what is the acceleration at the bottom, closest to the ground? I`ve tried to use 1/2kA2=1/2mx+1/2kx2 but it...
  30. N

    What is the maximum height h of his jump above the end of the ramp

    A 48 kg skier starts from rest at a height of H = 28 m above the end of the ski-jump ramp. As the skier leaves the ramp, his velocity makes an angle of 28° with the horizontal. Neglect the effects of air resistance and assume the ramp is frictionless. Could u give me a formula i need to start...
  31. B

    How much force is needed for Super Jump Shoes ?

    How much force is needed for "Super Jump Shoes"? My goal is to build a pair of super jump shoes. The road may be tough, but I like things to be tough. I was wondering how much force i would need for them to hit the ground to make at least a 180lbs/80kg person jump at least 1 foot in the air...
  32. Battlemage!

    Programs Can you jump from a BS in Math, minor in Physics, to a MS in Physics?

    I've taken enough math courses that it would actually be easier for me to get a BS in math, with a minor in physics, rather than a BS in physics and a minor in math (like I had thought I might like to do originally). My question is, could I pursue a MS in physics in grad school if I go ahead...
  33. N

    Delta-epsilon limit of a rational function with a jump discontinuity

    Hello, I am trying to prove the following... lim (x+3) \left|x+5\right|/x+5 x\rightarrow-5 from the left, L=+2 from the right, L=-2 I used delta-epsilon on the right hand limit and got \delta = \epsilon However, I'm not sure how to proceed when I get to this step while trying to prove the...
  34. J

    How Do You Calculate the Initial Height of a Ski Jump?

    Homework Statement A skier (m=53.00 kg) starts sliding down from the top of a ski jump with negligible friction and takes off horizontally. If h = 8.00 m and D = 9.50 m, find H. http://img517.imageshack.us/img517/616/prob21a.gif Homework Equations .5mv^2+mgh=.5mv^2+mgh The Attempt...
  35. N

    Robbers jump into a live broadcast poker tournament

    Six men with machine guns at the Grand Hyatt. A few injuries but nothing serious. All I can say is wow. http://www.nypost.com/p/news/international/brazen_bandits_hold_up_big_berlin_MLl35Q0NFMNR06LBaGmQnM Live broadcast video and bystander video...
  36. S

    What is the jump condition in Green's function and how is it used?

    What is the "jump condition"? I've been studying Green's function and I've come across something called the "jump condition". What is the "jump condition" and what it is used for (and perhaps an example)? Cheers.
  37. G

    How Fast Must a Basketball Player Jump to Achieve a 98.2 cm Vertical Leap?

    Homework Statement A 98.6 kg basketball player can leap straight up in the air to a height of 98.2 cm, as shown below. The player bends his legs until the upper part of his body is dropped by 67.0 cm, then he begins his jump. With what speed must the player leave the ground to reach a height...
  38. N

    Continuety from voltage current jump?

    http://i48.tinypic.com/wt8094.jpg how to deside which voltage or current is continues ?
  39. C

    What is the Direction of Acceleration During a Bungee Jump?

    When a bungee jumper reaches the lowest point of their jump, is the direction of acceleration up or down? What about at the highest point?
  40. T

    Help Me Calculate How high SuperMan can Jump

    Homework Statement This is a semester review. I am having trouble starting the second part of this question. It is well-know fact that Superman is "faster than a speeding bullet, more powerful than a locomotive, and able to leap tall buildings in a single bound." Assume his mass is 100kg. The...
  41. P

    Calculating Force Required to Perform an Exceptional Standing Jump

    Homework Statement An Exceptional standing jump would raise a person 0.80m off the ground. To do this, what force must a 66Kg person exert against the ground? Assume the person crouches a distance of 0.20m prior to jumping, and thus the upward force has this distance to act over before he...
  42. S

    Mythbusters Bus Jump Small Scale

    In the movie Speed a speeding bus is shown jumping a long gap in the elevated freeway. The Mythbusters test the physics at 1/12 scale. In the TV show Grant writes an equation to find the scaled down ramp exit velocity, where supposedly one must compensate the small scale speed downward because...
  43. S

    Calculating Closest Bungee Jump Distance

    Homework Statement an 80Kg bungee jumper steps off the jump platform which is 50m above the ground. the bungee cord is 25m long when relaxed and has an E value of 8 MPa and a cross sectional area of 400mm^2. Calculate the closest the jumper gets to the ground. Consider the center of...
  44. M

    Jump Shot Effect on Basketball: Does It Help?

    Hi, I was wondering if the act of jumping itself has an effect on the ball as it is released out of the players hands(ex. momentum etc.). I know that the increased height decreases the chance of the ball from being blocked, but i was wondering if it does more than that. Thank You
  45. 5

    Calculating Speed for High Jump of 1.60m

    Homework Statement At what speed would a 70-kg high jumper have to leave the ground in order to raise his body up to a height of 1.60 m Acceleration due to gravity: 9.8 m/s^2 [down] Homework Equations Kinetic Energy = 0.5(mass)(velocity^2) Gravitational Potential Energy =...
  46. J

    Calculating Vertical Jump Kinetics

    I'm working on a problem that analyzes vertical jump kinetics. I have a data file that has force plate data and corresponding time steps when a person jumped straight up and then landed on a force plate. I also have the vertical distance that the person jumped. I want to calculate: 1. The...
  47. S

    How do basketball players jump straight up into the air?

    The question asks to describe in terms of physics how basketball players can jump straight up into the air. I also have to show free body diagrams of the forces on the ground and on the player. The basketball player has gravity and normal forces acting on him and I am assuming that the rest...
  48. S

    Solving Long Jump Question: Find Takeoff Speed

    Homework Statement A runner jumps at 30 degrees to the ground and covers 8.90 m. What was the takeoff speed? The Attempt at a Solution I have no idea where to start...
  49. D

    Finding removable and jump discontinuities

    Homework Statement f(x) = -x + b, if x < 2 = 5, if x = 2 = -20/(x-b) + 1, if x > 2 For what value(s) of b does f have a removable discontinuity at 2? For what value(s) of b does f have a (finite) jump discontinuity at 2? Write your answer in interval notation. The Attempt at a...
  50. Z

    Projectile motion of long jump

    Homework Statement During a high school track meet, an athlete performing the long jump runs and leaps at an angle of 25 degrees and lands in a sand pit 8.8 m from his launching point. If the launch point and landing point are at the same height, y=0m, with what apeed does the athlete land...
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