Whetstone bridge with pencil jockey
A Wheatstone bridge is a circuit used to measure an unknown electrical resistance by balancing two legs of a bridge circuit. The classic Wheatstone bridge consists of four resistors forming a loop with a voltage source applied across one pair of diagonally opposite corners and a galvanometer connected across the other pair. When the bridge is balanced, the galvanometer indicates zero current flow, indicating that the ratio of the two resistor values on one side of the bridge equals the ratio on the other side.
A "pencil jockey" is a colloquial term for a technician or engineer who manually adjusts the resistors in the Wheatstone bridge circuit to achieve balance. The term "pencil" refers to the fine adjustments often made using a pencil or other tool to precisely dial in the resistance values.
In a laboratory setting, the Wheatstone bridge with a pencil jockey would be used to measure unknown resistances with high precision. The technician would adjust the resistors until the galvanometer reads zero, indicating a balanced bridge, at which point the ratio of the known resistors to the unknown resistor can be used to calculate its value. This setup allows for accurate measurement of resistances in various experimental setups, calibration procedures, or quality control processes.
White oil 162kg
White oil is a highly refined, colorless, odorless, and tasteless mineral oil that is commonly used in a variety of industrial, cosmetic, and pharmaceutical applications. It is produced by refining crude oil to remove impurities, resulting in a pure and stable oil that is chemically inert and non-toxic. White oil is typically characterized by its high purity, low viscosity, and low volatility, which makes it an ideal choice for applications where cleanliness, stability, and safety are important. Some common uses of white oil include as a lubricant, a carrier oil for fragrances and flavors, a plasticizer in the manufacturing of plastics, and as an ingredient in personal care products such as lotions and creams.
Wool Bonnet (12 pcs)
A wool bonnet is a circular pad made from wool fibers, often used with a polishing machine to apply or remove wax, polish, or other automotive detailing products on a vehicle's surface.
The wool bonnet's construction involves dense layers of wool fibers tightly stitched or woven together, providing a plush yet durable surface for polishing tasks. The natural properties of wool, including its softness and ability to hold polishing compounds, make it an ideal material for achieving a smooth and glossy finish on metals, wood, plastics, and other materials.
When attached to a polisher or buffer, the wool bonnet spins or rotates at high speeds, allowing the abrasive particles within polishing compounds to effectively smooth out imperfections, scratches, and blemishes on the surface being worked on. The gentle yet thorough polishing action of the wool bonnet helps to restore shine and luster to surfaces, leaving behind a professional-grade finish.
