When investigating or describing a system, the boundaries and initial conditions of the system need to be defined. we gotta start all over, we solved for the wrong question, but we're in luck. Aim at breaking all bricks by one shoot: Swipe your finger and throw balls,Make them roll among the bricks. Play for hours each time! Fully automatic progress save This game tasks the player with launching a single white ball at a line of numbered blocks in order to destroy them before they reach the bottom. Develop the tech skills you need for work and life. All 100,000+ K-12 STEM standards covered in TeachEngineering are collected, maintained and packaged by the Achievement Standards Network (ASN), [2], The happy ball has a lower hysteresis so it will dissipate more energy in the collision with the table, causing it to bounce relatively high. Additional team members could hold the meter stick steady and/or record the data. The file is saved to the Screenshots folder in your Pictures folder. If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. Support wikiHow by Couldn't you, if you had the mass of that person's head, calculate how fast their head moved away? The "happy" ball is firmer and results in an elastic collision with a surface, while the "sad" ball is squishier and results in an inelastic collision with a surface. Momentum and Impulse. By signing up you are agreeing to receive emails according to our privacy policy. Learn that understanding material properties is an important aspect of engineering design, Reason abstractly and quantitatively. Join us for videos from a VT Physics Lecture! In the demo for outreach, a basketball and a tennis ball are used. By using our site, you agree to our. Join us for videos from a VT Physics Lecture! Break bricks before they climb to the top. (Note: Have students complete question 11 as a group.). impulse in the X direction, and there was only one X Website: http://www.crystalrover.com Just play it to relax your brain. THE KEY TO MAKING SHOTS DOWN THE RAIL (POOL LESSONS) 8 BALL, 9 BALL 10 BALL FXBilliards 128K views 1 month ago Almost yours: 2 weeks, on us 100+ live channels are waiting for you with zero. Samurai Shodown III ACA NEOGEO Review The Last, But Is It The Least? Direct link to deka's post if you want to get an imp, Posted 2 years ago. There are easily ways to get ads clicked on inside the app. Here is how to do it: Create a (block) vector with all velocity vectors in sequence. Press the Windows logo key +PrtScn. You can also look for physics courses online, which can offer you interactive problems to try. The choice between which way is negative and which is positive is up to you, but just remember to be consistent. While this demo is a straightforward way to demonstrate elastic and inelastic collisions, this is possible due to something not so visible: hysteresis. Unit 6: Lesson 1. When the two balls are dropped with the tennisball on top, the tennisball will go flying into the . Please note that the ball may spin while moving. So, in other words, if there is a net impulse When the tennis ball and basketball are dropped touching one another, the momentum of the system is: $$ p_{total}=m_{tennis} v_{tennis} + m_{basket}v_{basket}$$, Since both are moving at the same velocity, this simplifies to, We know that the basketball has has about 10 times the mass of a tennis ball [1][2] so we can further simplify, $$ (m_{tennis} + 10m_{tennis})v \Rightarrow 11m_{tennis}\cdot v $$. Positive five 'cause I then let the balls drop so everyone can see. If it bounces up less than .5 meters, then it is more inelastic. Always check your work with an answer key to make sure you are solving problems correctly. Read the different explanations to find the one that makes the most sense to you. on an object, like this ball, that should just equal In most of the cases, while calculating such questions , Air resistance is usually neglected. 150 Newtons on the face from the ball. (c) The velocity in the vertical direction begins to decrease as the object rises; at its highest point, the vertical velocity is zero. Unobstructed, the balls assume an orientation as far from each other as possible. Isn't there a force of gravity? in the leftward direction, that means it's gonna be a negative force, so technically, you could say, this would be negative But still it will make the concept more complicated. Physics Balls : Bounce In Loop Machine! was in the X direction, and this five meters per second, I'm assuming is also in the X direction. the right with positive five. When the basketball hits the ground, it deforms both where it contacts the ground and where the tennis ball is in contact with it. we really found here wasn't the impulse from just our face, but the impulse from the person's face and the force of gravity Go through the problem and identify the variables that are relevant to solving the problem. Nested under units are lessons (in purple) and hands-on activities (in blue). In this video, David shows how to solve for the impulse and force applied during a dodgeball collision using the impulse momentum relationship. The requirements for the proctor are that they not be a relative of the student(s) taking the exam. a, Posted 7 years ago. Physics Balls is a playful brick breaker game for iOS! Since momentum is conserved for collisions? A baseball's inside is a mass of yarn wound around a cork core, and its cover material is leather. (Note: safety precautions should be taken when opening these balls and should be done under adult supervision. MEIZHUD Newton Cradle Balance Ball, Physics Balance Swing Ball, Office Table Accessories Accessories, Decompression Games, Physics Teacher's School Supplies. Include your email address to get a message when this question is answered. Think of it as a transfer of energy; less of that energy is being opposed by the balls internal friction. But not this many. To log in and use all the features of Khan Academy, please enable JavaScript in your browser. Find walkthroughs vidoes, tips, cheats and strageties for Physics Balls! t = ? (Grades 9 - 12). If you're seeing this message, it means we're having trouble loading external resources on our website. (Grades Use of the TeachEngineering digital library and this website constitutes acceptance of our Terms of Use and Privacy Policy. Department of Physics MC 0435 Dont leave all of your studying to the last minute, since procrastination is one of the biggest hindrances in understanding physics. Elastic hysteresis looks at how much of an objects energy is dissipated from internal friction. I quite enjoy playing it. School teams compete regionally with other school teams. (Grades The illustration of the percentage of energy returned to a ball after one bounce (or, the "range of bounciness" of each ball).copyrightCopyright The Exploratorium 2007, http://www.exploratorium.edu/baseball/howfar7.html. In this physics science fair project, you will explore the rebound heights for different balls and determine their maximum limits. 20740-3845, Phone: 301-209-3311 % of people told us that this article helped them. Both values are positive, so both the balls will move in the . Now, the definition of impulse, we use the letter J for impulse, that always seemed a little weird to me. collision problems, we typically ignore the force of gravity. By using this service, some information may be shared with YouTube. Meredith Juncker is a PhD candidate in Biochemistry and Molecular Biology at Louisiana State University Health Sciences Center. Momentum: Ice skater throws a ball. Homeschooled students should contact nearby high schools, community colleges, or universities to ask if they can take the exam there. Many sports and games, such as baseball and ping-pong, illustrate the ideas of momentum and collisions. The happy ball is, of course, the one that bounced and then I will explain what hysteresis is and how that affects the amount of energy stored in each ball. Large and Small Ball Collision Demonstrates the change in momentum and energy that occurs when two objects of significantly different masses collide. Hi I thought you multiply the net impulse force 3kg m/s by the time interval 0.02s but it is divided to give 150N, am I missing something? 54. Now, what would happen if the cheerleader tackled the football player? We have established five regions specifically for China, regions 15 through 19. With continued practice and focused study, though, you can master it. participating in the collision. Facebook; Twitter; Physics Balls Walkthrough Guide 2022. the face from the ball is gonna have the same size. Blacksburg, VA 24061. This game can get seriously out of hand, so if you feel like your game is unlucky just hit that reset button. If there were not, rubber balls would bounce forever. Almost a deal breaker. Happy/Sad Balls. Note: School Team scores are determined by the sum of the scores of the top five students competing. Recognize that different surfaces and materials promote different types of collisions. Her studies are focused on proteins and neurodegenerative diseases. The happy ball is firmer and results in an elastic collision with a surface, while the sad ball is squishier and results in an inelastic collision with a surface. Subject Areas: Math is the language of physics. unlocking this expert answer. The most addictive bricks-breaking balls game. ), The Physics Classroom and Mathsoft Engineering & Education, Inc., 2004, accessed May 30, 2007. http://www.physicsclassroom.com/Class/momentum/momtoc.html, Momentum and energy loss of balls colliding against different surfaces, accessed May 30, 2007. http://www.iit.edu/~smile/ph8709.html, The Exploratorium, Science of Baseball, accessed May 30, 2007. http://www.exploratorium.edu/baseball/index.html, The Exploratorium, Science of Baseball, accessed May 30, 2007. http://www.exploratorium.edu/baseball/howfar7.html, The Exploratorium, Science of Baseball, accessed May 30, 2007. http://www.exploratorium.edu/baseball/howfar5.html. -Swipe your finger and off the bounce ball. with negative signs here. These can be especially helpful if you are a visual learner, as they often offer contextual visuals. A shot sends the object ball out at 30. -Aim at breaking all bricks by idle ball. Last Updated: September 23, 2022 Or fastest delivery Thu, Jan 12 . in at 10 meters per second and let's say it leaves at a speed of five meters per second. in the X direction, was three, divided by .02. our face exerted on the ball. What are sports examples of transfer and conservation of momentum? Direct link to Katherine Tanner's post Couldn't you, if you had , Posted 6 years ago. PLEASE NOTE: AAPT does not refer or arrange test centers, teachers or proctors for the PhysicsBowl Contest. Hit items to make extra. initial velocity in the X, and the final velocity in the X, and I take the difference in momentum, what I really found was What we really did was we found the change kilogram meters per second, and that's gonna give me positive three kilogram meters per second is the impulse, and that should make sense. Do you agree with this alignment? If you know the change in momentum of the ball and over what time interval, then you could calculate the acceleration of the head if you know it's mass. For example, in F = m x a, 'F' represents force, 'm' represents mass, and 'a' represents acceleration. Here's how to raise your score in Ballz . 12), 3 different balls (suggestions: ping-pong ball, tennis ball, racquetball, golf ball, baseball, super ball, clay, billiards ball), 3 different bouncing surfaces (suggestions: tile floor, linoleum floor, carpeted floor, wooden block, cinder block). Powered by. Stored and transported in the red mechanics bin. Momentum is defined for a particular frame of reference; it is the mass times the velocity of the object. 3 unskippable, 30 second advertisements just for pausing the game and adjusting the settings. PHYSICS BALL HACK 2018 - YouTube PHYSICS BALL HACK 2018 INFINITY SCORE.INFINITY BALLS. Applying physics principles during a game will help you understand what is going on and also play better. Determine what the question is asking. The key is the "why?" Theta is most useful, in the gravity case. "It helped me to understand the topics well and how to analyze this as a beginner. (Answer: The bowling ball would bounce higher on the trampoline, while the baseball would bounce higher off of concrete.). The "restore purchase" button does absolutely nothing. I loved Physics Balls Pro, but the new "update" that took away the random power-up balls appearing in game and instead made the power-up balls money based totally ruined it for me! Rm.1902, Easey Comm. Then we can calculate the force exerted by it and subtract it from the initial momentum. from an individual force, is defined to be that force, multiplied by the time interval during which that force is applied. unfortunately, this person's face, multiplied by the time interval, which is 0.02, 20 milliseconds. Next I ask what should happen if I drop the balls so that they are touching and the basketball is below the tennis ball. I'm unfortunately probably going to end up uninstalling and moving to a different developer. It is expected that competitors will take the exam at their local school. I used to be afraid of physics but now I like it, thank you. Get a tutor if you are really struggling to understand the material. only X directed force, this had to be the impulse These are critical as some blocks will number in the 40s and 50s around the level 30 mark. There's no J in impulse. IOS Now let's switch gears and think about dropping the balls together. know some other numbers. This will be a complete walkthrough for Physics Balls on Android and iOS. Go to the library and find information on the topic youre struggling with in multiple books. The sad ball has a higher hysteresis so it will dissipate less energy in the collision with the table, causing it to barely bounce, if at all.[3]. Science Physics in the figure, 3 small balls are located at the 3 tips of a triangle of equal sides d. The masses are m1, m2, and m3. Were committed to providing the world with free how-to resources, and even $1 helps us in our mission. the ball from the person? Once some answers and reasons are given I will perform the other scenarios and explain the correct reasons for the different behavior. really, for a few reasons. E-mail: [emailprotected] It's Okay to Reset Ballz is very much a game of chance early on, as the board given to players can be really easy to. is exerting on the ball, so I can't use this formula This is the reason that after the cue ball collides with a stationary pool ball, it sometimes moves in a new direction, sometimes leading to a "scratch". Stay on top of your work. Use mathematical representations to support the claim that the total momentum of a system of objects is conserved when there is no net force on the system. | Gamers Unite! I'm gonna assume rightward is positive. Some balls are greatly affected by wind resistance, such as wiffle balls. However, having ads pop up every single time I pause the game is beyond frustrating. Determine the mass in kilograms of each ball and record it on the data sheet. Since the formula for finding kinetic energy, KE = 1/2(m)(v^2), requires both mass and velocity, and neither the mass nor the initial velocity of the face are provided, it cannot be determined if this collision is elastic. Data privacy and security practices may vary based on your use, region, and age. If students are new to the material and still unfamiliar with the equations they need for this activity, provide them the necessary equations. kind of compressed and then recoils and expands again, let's say the time that it's actually in contact is about .02 seconds, I have no idea what Jape Fat means, but it helped me remember After this activity, students should be able to: Each TeachEngineering lesson or activity is correlated to one or more K-12 science, So it's probably gonna recoil with a little less speed So that's why, in these force was acting on the object. During your playthrough of Ballz, there is little doubt you came across random yellow circles that appear during a match. Thanks for your feedback! Endless game mode Use the Escape key on a keyboard (or comparable method) to exit from full-screen mode. posing much of a problem. I like to do the large metal ball collision after to demonstrate a different form of energy conservation (via heat and sound). Remind students that no idea or suggestion is "silly." I like to start this by asking the students if they know what momentum is. Be sure the students do not use the balls as projectiles. Jennifer Ouellette - Nov 23, 2018 6:00 pm UTC Still, a fun concept and a nice way to pass time while waiting for the bus. We use cookies to make wikiHow great. 1. Since the sad ball stores its energy far more than the happy ball, that energy is not being transferred in the collision, which is why it appears to be an inelastic collision. Sometimes when moving objects collide into each other, momentum can be transferred from one object to another. Thanks to all authors for creating a page that has been read 149,019 times. The PhysicsBowl exam MUST be proctored. We can't use force because Hit items to make extra balls or double size ball or other fantastic effect.Prevent the bricks to reach the top check-line! I end up calling it jimpulse, just so I can remember that it's impulse, and there's a J for it. Hit . The balls move apart. Problem Solving: Present the class with the following cases: Ask students which ball would bounce higher if each were thrown onto a trampoline with the given velocities. So we can set up the before- and after-collision equations to solve for the velocity of the tennis ball in the end as compared to the initial velocity. Since both balls are elastic, both rebound to their original shapes. 2-dimensional momentum problem (part 2) Force vs. time graphs. Large and Small Ball Collision. A baseball has a similar construction, but with very different materials. What would happen if Patrick tackled Spongebob? Units serve as guides to a particular content or subject area. Be enthusiastic about your studies! Learning how the human body and equipment interacts with the ball during impact or how the human body interacts with the inside of a car during a crash, helps engineers design better sports equipment and safer vehicles. (I will be assuming the basketball ends up with a final velocity of zero. ball is to the right, because the ball was initially going left and it had a force on it to the right that made it recoil and the net force on the ball in the X direction, which was supplied by, Any elastic ball with significantly less mass than a basketball should work. Twitter: https://twitter.com/BigdogDev. Physics Balls Kefan Xie The Best Brick Breaker Game Free In-App Purchases 4.0 Ratings 5K+ Reviews About Physics Balls Ratings & Reviews 4.0 4.6K+ Ratings 84+% 4 9+% 3+% 2 1+% 1 2+% All Positive Negative Community Expert 5 A unique mix between brick breaker and bubble shooter, with a side of gravity games thrown in The Happy/Sad balls demo is a basic and straightforward way to demonstrate elastic and inelastic collisions. it's moving to the right. since I played dodgeball. You can set the initial height (0-20m), set an initial velocity from -20 to 20 m/s, and change the rate of gravitational acceleration from zero to 20 m/s/s. Aim at breaking all bricks by one shoot: Swipe your finger and throw balls,Make them roll among the bricks. 'Cause if I'm taking the 2023 Virginia Polytechnic Institute and State University. Then I say, "As you all know, when I drop either of these balls, they bounce back up part of the way" and show this happening. People just plug in positive What the heck! K - Ask the students: Voting: Ask the students to vote to rank the sports (named above) from those having the greatest momentum to those having the least momentum. If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked. pneumonic device, Jape Fat. PHYSICS BALL HACK 2018 INFINITY SCORE.INFINITY BALLS. Got an ad. I'm heading towards class 11 and this article has made my, "This article helped me by following the steps and doing them correctly and now I am doing great in school and I, "Nice guide, I hope it can motivate me to successful mastered the physics, especially in computational physics at. This is likely a theta of 180 in your system. Baseball is a great example of the science of projectile motion, or the study of how an object like a ball moves through the air when it is launched (or thrown, or hit with a bat).Projectile motion lets you predict a ball's trajectory, or the exact path the ball will take through the air and where it will land.A ball's trajectory is influenced by forces like gravity and air resistance. And finally, remember that Also, they will have plenty of opportunity to learn how to calculate momentum and understand the principle of conservation of momentum. I don't know the force that this person's face Proctors should have at least a 2-year degree, though this degree does not need to be related to physics. is equal to that force, multiplied by how long that Each Division has 15 regions that have been established across the country to allow schools in each region to compete against one another. Theres no time limit, so be patientand line up your shots before you fire. An elastic collision is one in which kinetic energy remains the same before and after the impact. So, if we knew the force on this ball, we could use this formula 12), Solve quadratic equations in one variable. (Grades Following are the Kinematics equations: Where d is the displacement of an object, Vi is the initial velocity of the object, Vf is the final velocity, a is the acceleration of the object, and t is the interval of time the object traveled. Let your friends and family know not to bother you during this time. My final momentum is M times V, so it's gonna be mass times V final, minus mass times V initial, and my mass is .2, so I've got a mass of 0.2 kilograms. The force, the net force on the ball, during this time interval Regions 15 through 19 everyone can see determined by the time interval during which force... Let the balls assume an orientation as far from each other, momentum can be from. Youtube physics ball HACK 2018 INFINITY SCORE.INFINITY balls full-screen mode basketball is the. Record the data sheet seriously out of hand, so both the balls will move the... Posted 6 years ago different behavior and find information on the trampoline, while the baseball would forever! Will help you understand what is going on and also play better than.5 meters, then is. To get a message when this question is answered sound ) this video, David shows how do! The bricks Pictures folder a tutor if you feel like your game unlucky. Three, divided by.02. our face exerted on the trampoline, while the baseball would bounce.! The demo for outreach, a basketball and a tennis ball ) to exit from mode! I drop the balls together that no idea or suggestion is ``.... I like to start this by asking the students do not use letter..., is defined to be defined 'm taking the 2023 Virginia Polytechnic Institute and State.! Only one X website: http: //www.crystalrover.com just play it to relax your brain explain correct. A playful brick breaker game for iOS original shapes the Least be sure the students if they can the. Focused study, though, you agree to our and reasons are given I will be a Walkthrough! On your use, region, and even $ 1 helps us in helping more like... It and subtract it from the initial momentum by.02. our face exerted on the ball, during this.. 'Cause if I 'm taking the 2023 Virginia Polytechnic Institute and State University Sciences. Proteins and neurodegenerative diseases purchase '' button does absolutely nothing Theta is most useful, in demo! Material and still unfamiliar with the equations they need for work and life got ta start all over, typically! Before and after the impact applied during a dodgeball collision using the impulse momentum relationship problems to try,,. It is more inelastic Review the Last, but is it the Least to Katherine Tanner 's if. Under adult supervision but with very different materials Math is the language of physics topics well how! Was only one X website: http: //www.crystalrover.com just play it to relax your brain little weird to.... Know what momentum is elastic, both rebound to their original shapes 're! 23, 2022 or fastest delivery Thu, Jan 12 as far from each,... Is saved to the library and this five meters per second or comparable method ) exit! In your Pictures folder you, please consider a small contribution to support us in our mission once some and! Delivery Thu, Jan 12 additional team members could hold the meter stick steady and/or record the sheet... 'Cause if I 'm taking the exam at their local School most useful, physics balls tips the has. Both balls are dropped with the equations they need for this activity, provide them the necessary equations is... To start this by asking the students if they know what momentum is can be transferred from object. Recognize that different surfaces and materials promote different types of collisions we established! The force exerted by it and subtract it from the initial momentum teachers!: AAPT does not refer or arrange test centers, teachers or proctors the... Then it is the & quot ; why? & quot ;?. You want to get ads clicked on inside the app need to be defined than meters. Pausing the game is unlucky just hit that reset button file is saved to the library and find on! Masses collide digital library and find information on the topic youre struggling with in multiple books may based. Key is the language of physics is positive is up to you, if you 're behind a web,! Told us that this article helped them spin while moving leaves at a speed of five meters per and... Exerted on the trampoline, while the baseball would bounce forever their maximum limits ( s ) taking the Virginia... Complete Walkthrough for physics balls is a playful brick breaker game for iOS or proctors for the impulse force! Your use, region, and its cover material is leather balls is a mass yarn... Time limit, so if you want to get a message when this question is answered consider a small to! It is more inelastic, there is little doubt you came across random circles! To relax your brain rebound to their original shapes members could hold the meter stick and/or. Students if they can take the exam there be done under adult supervision dissipated from internal friction happen the. September 23, 2022 or fastest delivery Thu, Jan 12 the settings on a keyboard ( or comparable ). Switch gears and think about dropping the balls so that they are touching and the basketball below! Are positive, so both the balls internal friction, 30 second advertisements just for pausing the game is just... Direct link to Katherine Tanner 's post if you 're behind a web filter please. In momentum and collisions be afraid of physics iOS now let 's say it leaves at a speed five., I 'm assuming is also in the demo for outreach, a basketball and a tennis ball are.... Walkthrough Guide 2022. the face from the ball, during this time tackled football..., Reason abstractly and quantitatively do it: Create a ( block ) vector with all velocity in! And *.kasandbox.org are unblocked surfaces and materials promote different types of collisions remember that 's! It to relax your brain different materials on top, the boundaries and initial conditions of the object ball at.? & quot ; physics balls tips is most useful, in the X,. And focused study, though, you agree to our privacy policy shot sends the object out! Each other as possible negative and which is 0.02, 20 milliseconds higher off of concrete... Game is unlucky just hit that reset button shows how to solve for the wrong question, is. Ends up with a final velocity of the scores of the student s... 2-Dimensional momentum problem ( part 2 ) force vs. time graphs different materials time I pause the game and the! Tips, cheats and strageties for physics balls is a playful brick breaker game iOS..., 20 milliseconds they are touching and the basketball is below the ball! Basketball is below the tennis ball are used and subtract it from the momentum! Kilograms of each ball and record it on the ball this physics science fair,!, what would happen if I drop the balls will move in the X direction, and there only... A little weird to me and moving to a different developer: http: just... Theta of 180 in your system if I 'm taking the 2023 Virginia Institute! Seriously out of hand, so both the balls so that they not be a complete Walkthrough for balls! File is saved to the Screenshots folder in your Pictures folder by the sum of the TeachEngineering digital and. Elastic, both rebound to their original shapes unlucky just hit that reset button so be patientand line your. The library and find information on the ball is gon na have the same before after... Is most useful, in the gravity case your browser on Android and iOS site, you can look. Constitutes acceptance of our Terms of use and privacy policy we use the Escape on. It: Create a ( block ) vector with all velocity vectors in sequence of concrete )!, in the demo for outreach, a basketball and a tennis ball higher off of.... Students are new to the Screenshots folder in your Pictures folder that understanding material properties is an aspect! In and use all the features of Khan Academy, please Make sure that domains! Thanks to all authors for creating a page that has been read 149,019 times a basketball and a tennis.... During your playthrough of Ballz, there is little doubt you came across random yellow circles appear. Please enable JavaScript in your system information may be shared with YouTube Shodown III ACA NEOGEO Review the Last but!: Math is the language of physics to Make sure you are agreeing to receive emails according to.! Of it as a group. ), though, you can also for... Of five meters per second, I 'm assuming is also in the for... Tanner 's post could n't you, if you are agreeing to emails... Ball out at 30 people told us that this article helped them JavaScript! Internal friction this is likely a Theta of 180 in your browser the ideas momentum! 10 meters per second and let 's switch gears and think about dropping balls. For iOS members could hold the meter stick steady and/or record the data local School offer interactive. Definition of impulse, and there was only one X physics balls tips: http: //www.crystalrover.com just it..., physics balls tips second advertisements just for pausing the game is beyond frustrating large metal collision. Health Sciences Center relax your brain shoot: Swipe your finger and throw balls, Make roll. Appear during a dodgeball collision using the impulse momentum relationship that this article helped them a when! 2022. the face from the ball may spin while moving `` silly ''... Person 's face, multiplied by the balls as projectiles what are sports examples of transfer and conservation momentum... Guides to a different developer of impulse, that always seemed a little weird to me is it the?.