Classroom Launcher

[Heberto Calderon]

Studentscan build their own straw rockets and test them on the Straw Rocket Launcher. Just like early rocket pioneer Robert Goddard, they can conduct scientific experiments by varying the trajectory angle and launch energy. These rockets can travel up to 50 feet!

The Straw Rocket Launcher uses pneumatic force created by releasing a weighted drop rod in the cylinder to launch rockets. The force of the launch can be controlled by varying the release height of the rod. The launcher features the following:

Building straw rockets is a fun, inexpensive activity and a great way to introduce students to rocketry. Use with Precision Straws, sold separately. Recommended for use in a large, open indoor area such as a gymnasium.

I have an IntelliJ Android project, that I successfully imported to Android Studio 0.4.0. It works perfectly if I don't change anything in manifest. However, when I want to change the launcher activity and run, it fails with this error:

Edit 2

As suggested by a couple of users in the comments below, sometimes the issue can be resolved by completely removing and reinstalling the app from your device.

Simply type adb uninstall in terminal to completely remove app from the device.

Edit 3

As mentioned in Abhishek's Answer, one should also try deleting the app from your device in case multiple users are set up on your device.

Simply go to Mobile Settings > Apps > [Your App] > More > Uninstall App for All Users

Edit 4

As mentioned by Yassin Ajdi, executing the uninstallAll Gradle task can also fix the issue.

You can go to Gradle > Tasks > Install > uninstallAll to get the job done.

In my case, it was because the app I was trying to launch was installed for a different user on the device. Go to Settings -> Apps (All apps) and and select the app. Click on the overflow menu and select "Uninstall for all users".

For me it was a very specific problem, I've got a Lg g5 to test my application on, and to reset my apps data I uninstalled it on the phone, but the phone has a "nice" feature to don't uninstall apps immediatly so you might can reinstall them within one day.So the app was installed but not usable(disabled) after removing the app from the phone completely it worked.

Just in case anyone runs into my issue and has no luck with the other solutions...I was trying to start an activity through adb for FireTV while debugging Amazon launcher integration. However, my project had 60 different build variants (multi-platform, multi-app project) and the ApplicationId didn't match any classpath since the runtime package (and classpaths) were different from the applicationId.

I found the application on my phone by typing the name of the app in the search field. I realized it was in the "Work"(using Mobile@Work) profile and removed it. You can find the settings for the profile by going to Settings->Work profile->Apps

Faced this problem in android studio 3.5.1 Took me a day to solve this problem,Tried everything including cleaning cache,restart and renaming package name as well. So if any of above did't work than try this.

Once you procure your materials for cars, its time for your students to build. There are three phases at this point: design, build, test. At the high school level, my students will design three draft cars using this worksheet in class with student feedback and revision. We would have in-class discussions and demonstrations of aerodynamic principles. For homework we would research aerodynamics via online resources and videos, revise our drawings and defend our choices on a running blog. At the middle school levels, I drop the number of revisions, do a simpler introduction of the concept of aerodynamics and focus my energy on the physics of motion. The reflection process takes the same about of time at both levels and I focus on the process of discovery and extracting scientific conclusions from the available data.

Make it safe & keep the rubber side down this week. Thank you for visiting my practice zone and project showcase. If you wish to lend your support for this site, please like WoodshopCowboy on Facebook or follow me on Twitter. If you are interested in making and education, why not check out Work Notes, a curated set of articles from the web, published every week?

The basic mechanics of a firing CO2 launcher is a firing pin and a force which hits the pin forward, just like the inside of a firearm. You can always expand this design sideways, add a third bolt and you should get something that works.

The mighty space rockets of today are the result of more than 2,000 years of invention, experimentation and discovery. Rockets have launched spacecraft to every planet in the solar system and even sent humans to the moon. Soon, they will take humans even farther to places such as Mars and beyond.

Each rocket has a unique design that's dependent on the mission at hand, but they all have a few essential parts: the fuselage, the fins and the nose cone. The fuselage is the main body of the rocket. The fins provide stabilization and are placed symmetrically around the circumference of the fuselage near the tail. And the nose cone is secured to the top of the rocket to aid in aerodynamics by piercing the air.

The stomp rockets in this activity, while simple, can have a surprising amount of variability in the altitude they achieve. By eliminating drag and streamlining their designs, students can make their rockets fly higher. The rockets won't reach Mars, but if designed properly, they can reach more than 50 meters!

Launch and Track the Rocket:

Safety Note: Use caution when launching the stomp rockets. Keep all students clear of the launch tube and the landing area. Allow only one student, the stomper, to be near the launcher, and be sure the launch tube is pointed away from the stomper. Only retrieve rockets once they have landed.

Analyze data from tests to determine similarities and differences among several design solutions to identify the best characteristics of each that can be combined into a new solution to better meet the criteria for success

Make formal geometric constructions with a variety of tools and methods (compass and straightedge, string, reflective devices, paper folding, dynamic geometric software, etc.). Copying a segment; copying an angle; bisecting a segment; bisecting an angle; constructing perpendicular lines, including the perpendicular bisector of a line segment; and constructing a line parallel to a given line through a point not on the line.

Draw (freehand, with ruler and protractor, and with technology) geometric shapes with given conditions. Focus on constructing triangles from three measures of angles or sides, noticing when the conditions determine a unique triangle, more than one triangle, or no triangle.

Giving quantitative measures of center (median and/or mean) and variability (interquartile range and/or mean absolute deviation), as well as describing any overall pattern and any striking deviations from the overall pattern with reference to the context in which the data were gathered.

Class schedules may be viewed (and printed) in the Student Planning section. Students can access this information through additional apps or course registration quick app launcher. Click My Class Schedule and follow the prompts.

Students can pay their bill from the Tuition Billing and Payments quick app launcher on MyKSC. Students will need to set up a parent as an authorized payer. Students can do this through Tuition Billing and Payments. Parents will log into Authorized Payer to pay bills.

MyKSC announcements are the main vehicle of communication to students and follow the Communication Guidelines for Student Communications. Any KSC affiliated department or student organization/club may post an announcement to MyKSC for students.

MyKSC allows students to conduct academic activities on their mobile device such as; search and register for classes, academic planning, view grades, pay bills, and more! To access MyKSC, go to the MyKSC page on your mobile device.

The Community Partner, iMagic, acted as a mentor to the student during the build of the Ballistic Launcher. A couple times during the ELO the student shared their designs and progress on building the launcher for feedback and problem-solving.

Teachers can use Responsibility Launcher as part of a greater iCivics curriculum, as a stand-alone game during a lesson on civic responsibility, or by following the lesson plan provided on the iCivics website. The game offers students a valuable reminder that our government and society only work because of citizen involvement.

Liberty Belle, the Fairy of Civic Responsibility, inspires citizens to do their civic duty by launching anvils at them. She also guides students as they read about ordinary citizens' issues and complaints and match those issues to different forms of civic engagement, such as jury duty, military service, voting, community service, staying informed, and others.

Students listen to each issue and scroll through the civic-duty anvils until they find a match. They then move the anvil to the proper catapult, click the launcher, and Liberty Belle launches the anvils at citizens. Correct matches cause citizens to avoid the anvils and be inspired. Incorrect ones cause the anvils to land on the citizens' heads, confusing them. Students have additional opportunities to answer incorrect matches correctly.

One citizen is added in each of the game's rounds, ending with five citizens in round five. There are always more civic engagement topics than citizens, so students must read carefully to make proper matches.

Full Disclosure: iCivics and Common Sense Education share a funder; however, that relationship does not impact Common Sense Education's editorial independence and this learning rating.

Students learn how to use civic engagement to navigate society and the governments that affect us, and they discover a number of ways to participate in societal and government processes. Some citizens' issues, such as military service, are quite easy to match properly, but others, such as community service, require a much closer read. Although this is a very quick game that doesn't teach subjects in great depth, it's very useful as an introduction for students who will study the topics further. The game is short, but lessons are learned.

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