Final answer:
A bender is a tool used in electrical conduit bending. To create a 90-degree stub, you can use the 3-point saddle method.
Step-by-step explanation:
In physics, a bender is a tool used to bend electrical conduit. To create a 90-degree stub, you would typically use the 3-point saddle method. This involves marking the bender at a distance of one foot from the bend. The mark on the bender should correspond to the center of the conduit, and this is where you would begin the bend.
You can use a protractor to measure the angle and ensure it is a perfect 90 degrees. The bender should also have angle markings to help you achieve the desired bend. Remember to adhere to safety guidelines and wear appropriate protective equipment when using a bender.