How do you calculate the mechanical load of a motor? In our example input electrical power of the motor is 0.22 A x 6 V = 1.32 W, output mechanical power is 1000 rpm x 2 x 3.14 x 0.00126 N•m /60 = 0.132 W. Motor torque changes with the speed. At no load you […]
Which method of determining volume is more accurate?
Which method of determining volume is more accurate? Using the smallest graduated cylinder possible allows for a more accurate measurement. Ask students to estimate the volume of water that will be displaced, and match the size of the graduated cylinder to the estimate. What is the method of finding volume? For less defined shapes, volume […]
What happens to the current in a circuit if a 10 Ω resistor is removed and replaced by a 20 Ω resistor?
What is the step in the design process where you identify a problem or need that exists?
What is the step in the design process where you identify a problem or need that exists? The steps: The steps: ask to identify the need and constraints, research the problem, imagine possible solutions, plan by selecting the most promising solution, create a prototype, test and evaluate the prototype, and improve and redesign as needed. […]
How piezoelectric transducer can be used for pressure measurement?
How piezoelectric transducer can be used for pressure measurement? When a force is applied to a piezoelectric material, an electric charge is generated across the faces of the crystal. This can be measured as a voltage proportional to the pressure (see diagram to the right). As a result, piezoelectric sensors are not normally suitable for […]
What are the disadvantages of air-cooled engines?
What are the disadvantages of air-cooled engines? What are the disadvantages of an air-cooled engine? Air-cooled engines are more likely to overheat. They can also be more expensive to build and the large fans used to cool the engine can take away a lot of power. How are aircraft engines cooled? Reciprocating engines are cooled […]
How is math used in origami?
How is math used in origami? There are many aspects to the mathematics of origami, or paper folding. One may study combinatorial properties that emerge from folded paper. One can study origami as mappings from the Euclidean plane into three-dimensional space that have certain properties. Then we unfold the paper and make another crease line. […]
What are the top three responsibilities of a pastor?
What are the top three responsibilities of a pastor? Your duties include preparing weekly sermons, preaching and conducting worship services. It’s your responsibility to interpret biblical scripture for the congregation. You also provide care and counseling to church members and assist them in crisis situations. What are the duties and responsibilities of a pastor? The […]
What affects the severity of an electric shock?
What affects the severity of an electric shock? The three primary factors affect the injury severity of an electric shock: 1) the amount of current passing through the body 2) the duration of the current flow and 3) the current path through the body. What are four factors that affect the severity of an electrical […]