Stem Comprehensive Study Guide With Correct Answer

What is a rapid prototyping? - correct answer Rapid prototyping is the process by which engineers and designers quickly make a version of a product to assess a specific design element. Which of the following statements about rapid prototyping is TRUE? Rapid prototyping is the process by which engineers and designers quickly make a version of a product to assess a specific design element. - correct answer Rapid prototyping The process by which engineers and designers quickly make a version of a product to assess a specific design element is called: - correct answer Rapid prototyping What are the steps of the Design Process? Identify the Problem, - correct answer Explore, Design, Build, Test, Improve After identifying a problem you want to solve, what are the additional steps of the Design Process? - correct answer Explore, Design, Build, Test, Improve What is the function of the hot end in a 3D printer? - correct answer The hot end melts the material and places it on the correct spot. In a 3D printer, _____________ is a heated nozzle that melts the material and places it on the correct spot. - correct answer The hot end Which of the following statements about the hot end in a 3D printer is TRUE? - correct answer The hot end melts the material and places it on the correct spot. What is the function of the extruder in a 3D printer? - correct answer The extruder is powered by a motor that guides the material out at the correct rate. In a 3D printer,_____________ is powered by a motor that guides the material out at the correct rate. t - correct answer he extruder Which of the following statements about the extruder in a 3D printer is TRUE? - correct answer The extruder is powered by a motor that guides the material out at the correct rate. Imagine you are designing a new backpack: why might you choose different materials for different parts of the backpack design? - correct answer Different materials are best suited to different tasks. Imagine you are designing a new backpack. Which of the following statement(s) about why you might choose different materials for different parts of the design is TRUE? - correct answer Different materials are best suited to different tasks and it is important to test materials to know what will work best in the final design Imagine you are designing a new backpack. Which of the following statement(s) about why you might choose different materials for different parts of the design is FALSE? - correct answer This is not a good idea, you should always make the design out of only one material. The cyclical, multistep process by which designers and engineers design, build, and test a new product is called: - correct answer Design process Imagine you are using the design process to design and build a new bike, which next step would you take after you had created a first prototype? - correct answer Test out your prototype to see how you might improve it in the next version. Imagine you are using the design process to design and build a new bike, which next step would you take after you identified the problem you were trying to solve with your new design? - correct answer Explore different materials and approaches you might take to solving the problem. Imagine you are designing an object that needs to be very flexible. Which of the following 3D printing materials would work best? - correct answer Nylon Which of the following 3D printing materials would be the most flexible? - correct answer Nylon Imagine you are designing an object that needs to be very flexible. Which of the following 3D printing materials would be a good choice? - correct answer Acrylic When making a new product, why might designers and engineers go through the design process more than once? - correct answer Designers and engineers repeat the design process to address different parts of their design, or improve their design further. Which of the following statements is TRUE about the design process? - correct answer The design process is a cyclical, multistep process. Which of the following statements is FALSE about the design process? - correct answer Designers and engineers only go through the design process once when designing a product. The type of computer drawing used to create 3D models is called: - correct answer Computer Aided Design (CAD) In 3D printing, the acronym CAD stands for: - correct answer Computer Aided Design Which of the following statements is TRUE about Computer Aided Design (CAD)? - correct answer A CAD model is often used for creating digital models that are the base for 3D printed objects. Imagine you want to create a kite that is lighter and more aerodynamic and want to use the design process to create your product. What would be the first thing you would do? - correct answer Research and explore what other designers have used to create kites in the past and what materials or techniques you might use for your version. Imagine you are using the design process to create a new kind of kite. You are using the design process and have just finished making a detailed plan for how you are going to make your kite. What should you do next? - correct answer Start building! Create a quick version of your idea. Imagine you are using the design process to create a new kind of kite. You've researched and explored what other kite designers have done in the past and determined which materials you will use. What should you do next? - correct answer Create a detailed plan about how you will create you kite. When calculating the expenses to run a business, there are things that can't be changed, called constants, and things that can be changed, called - correct answer Variables When an independent variable changes - correct answer The dependent variable changes If spectators buy more team jerseys when the team has a winning record, which statement is true? - correct answer The team's record is the independent variable that affects how many jerseys are bought As a sports store owner, the higher the price you charge for gear - correct answer The greater your profits until it becomes too expensive To increase profits while selling jerseys, a store owner can - correct answer Raise the prices What causes profits to be reduced? - correct answer When prices are too high Which is the best information to determine an athlete's abilities and needed areas of improvement? - correct answer Her performance over the course of a season Why is it important for a sports analyst to look at data over the course of an entire season? - correct answer They can determine an athlete's performance better over time Observing an athlete over the course of a ________________ helps to determine their abilities and areas of needed improvement - correct answer Season Raising prices on sports jerseys can - correct answer Reduce profits if they are too expensive Higher prices for sports jerseys can result in - correct answer Fewer people buying them As the price of a sports jersey goes up - correct answer Profits can go down as fewer people can afford it Trackers inside of basketballs help athletes improve their performance by - correct answer Analyzing and improving backspin speed After analyzing the data from a tracker on a basketball, an athlete will most likely - correct answer Change the rate of backspin Analyzing a basketball's backspin allows an athlete - correct answer To improve their ability to make a basket What conclusions can you make if a hockey goalie fails to block pucks shot in the upper right hand corner of the net? - correct answer The goalie should focus on improving their reactions to that area of the net By recording where a hockey puck goes into a net, a goalie can - correct answer Determine where they are not successfully blocking goals By recording where a hockey puck goes into a net, a goalie can - correct answer See a pattern of where they successfully block and don't block shots Recording the number of pucks that enter the hockey net and their location helps sports analysts - correct answer Track the rate of successful blocks and determine where a goalie needs to focus in order to improve it Knowing how many goals were missed is important but knowing where those pucks went into the net is even more important because - correct answer It helps a goalie understand where they need to focus to block more shots Recording where the puck goes into a net helps a goalie - correct answer Determine where they need to focus to improve it Mapping where a puck goes into a goal allows a sports analyst to - correct answer Inform the coach of where the goalie's weak area is in blocking scores How could knowing a goalie's save percentage and where they let most goals into the net help them improve? - correct answer It helps to identify where they are weakest in blocking goals Mapping where a puck goes into the net is valuable because - correct answer It helps to identify where a goalie is weakest in blocking goals Wearables that can track eye movements can - correct answer Help you determine where to focus during a shot on goal Tracking a basketball's backspin with an internal sensor can.. - correct answer .Help a player improve one part of their shooting technique Tracking eye movements using wearables can... - correct answer Help athletes focus on areas that need improvement Wearables, video playback and tracking devices can all help athletes because... - correct answer Technology can help athletes focus on areas that need improvement Which type of technology can help an athlete record the speed and force they have on pucks or balls? - correct answer Tracking devices Wearables, video playback and tracking devices can all help athletes because... - correct answer Technology can produce useful data that can be used to analyze an athlete's performance Spills should be cleaned up __________. - correct answer immediately What should you do when unplugging an electrical cord? - correct answer grasp the plug to unplug the cord You should avoid startling anyone who is using a ______________. - correct answer hot glue gun, pair of scissors pair of snips You should report any spills to your __________ immediately. - correct answer teacher You should never place tools or other materials in a place where they might _________, _________, or __________. - correct answer Roll, slide, fall Use caution with glue guns because they can __________ you. - correct answer burn Be careful when using cutting tools because they can ________ you. - correct answer cut You should observe all safety practices for ___________. - correct answer Others, the equipment, yourself It is okay to unplug an electric cord, but when your hands are __________. - correct answer sticky How many students are in TSA? - correct answer 250,000 Which of the following should remain clear and unblocked? - correct answer lab aisles and exits What should you cover the tables with when working with glue guns? - correct answer wax paper You can eat and drink in the lab. - correct answer False Do not look directly into a ___________. - correct answer laser What does TSA mean? - correct answer Technology Student Association When cutting material to build bridges, you must wear _______________. - correct answer safety glasses Long hair must be _________ before working with rotating machinery. - correct answer pulled back When you put on the brakes of your bike, the wheels stop turning. Friction between the wheels and the road slows your bike to stop. Which type of friction is this? - correct answer sliding friction Calculate the net force being applied to the objects. Include SIZE and DIRECTION. - correct answer 10 N-- Calculate the net force being applied to the objects. Include SIZE and DIRECTION. - correct answer 3 N-- What is a force? - correct answer A push or pull Every force can be represented by a vector. A vector has two aspects. What are these two aspects? - correct answer Size and Direction Which of these is evidence that an unbalanced force is acting on an object? - correct answer The motion of the object is changing What is inertia? - correct answer An object's tendency to stay at rest or in motion Inertia depends on the _________ of an object . - correct answer Mass Newton's second law states that... - correct answer An object acted on by an unbalanced force will accelerate in the direction of the force. What is the formula to calculate force? - correct answer Force = Mass X Acceleration An object with a mass of 300 kg is observed to accelerate at the rate of 4 m/s2. Calculate the force required to produce this acceleration. - correct answer 1200 N A force of 20 N acts upon a 5 kg block. Calculate the acceleration of the object. - correct answer 4 m/s2 In the past space travel was considered impossible. This was because space was effectively a vacuum (empty space). How does a rocket work in space? - correct answer Hot gasses are released downward from the rocket, creating an equal size upward force on the rocket that pushes the rocket up. Stacy is rowing a boat. She wants the boat to move forward. According to Newton's Third Law, in which direction should she move her paddle in the water? - correct answer Backwards Newton's First Law states that _________________. - correct answer An object at rest stays at rest, and an object in motion stays in motion, unless acted on by a force Newton's Second Law states that ______________. - correct answer The greater the mass of an object the more force needed to accelerate Newton's Third Law ______________. - correct answer For every action there is an equal and opposite reaction the tendency to resist change in motion Which statement is true about all forces? - correct answer forces always act in pairs Newton's first law of motion states that an object at rest will stay at rest unless acted upon by an outside force. Which activity is an example of this law? - correct answer A football is kicked off a tee.