Question

_______ is a wheel with tooth around its rim

Answer 1

Hint: In order to answer this question, to know the exact term for the given statement, we will explain that term deeply and also we will tell why it is known as a wheel with a tooth around its rim. We will explain more about it.

Complete step by step answer:
A gear is a wheel with teeth around its rim or circumference. Gears are commonly found in pairs or groups of two or more, and they are used to relay rotation from one gear's axis to the axis of another. The teeth of one axis' gear mesh with the teeth of another axis' gear, forming a rotational relationship between the two axes.
A gear is a rotating circular machine part with cut teeth, or inserted teeth (called cogs) in the case of a cogwheel or gearwheel, which mesh with another toothed part to transmit torque. A gear is also known as a cog informally. Geared devices can adjust a power source's speed, torque, and direction. Via their gear ratio, different-sized gears create a shift in torque, providing a mechanical advantage, and thus can be called a simple machine. Two meshing gears have different rotational speeds and torques in relation to their diameters. The teeth on both meshing gears are identical in shape.
A gear train or transmission is a collection of two or more meshing gears that operate in a specific order. The wheels in a crossed, belt pulley system are similar to the gears in a transmission. The teeth of a gear resist slippage, which is an advantage of gears. The word "gear" (e.g., "first gear") refers to a gear ratio in transmissions with several gear ratios, such as bicycles, bikes, and automobiles.

Note: Number of teeth, it's pretty self-explanatory; it's the number of teeth on the gear. The reference circle and the diameter of the reference circle. The top and bottom of the teeth are represented by the tip diameter and root diameter. In gear design and calculation, the reference diameter is used.