Drywall - also known as Plasterboard

Drywall is known by various names, including plasterboard, wallboard or gypsum board and is used for interior walls and ceilings. It became popular in the 1930s as a replacement for the lath and plaster approach (which actually has better sound proofing capabilities than plasterboard, but is more expensive to install).

Solvent Cement

Solvent cement is used for welding thermoplastic piping and sheets together, It does this by softening the material being bonded and forming a waterproof seal. The type of solvent cement must be compatible with the thermoplastic to form a strong bond.

Engine Oil

Engine oil, or motor oil, is a lubricant for internal combustion engines, found in cars and even lawnmowers.  The lubrication increases the efficiency of moving parts which move against each other. Lack of it increases fuel consumption and can lead to engine failure.

Rubbing of engine parts can lead to microscopic metallic parts deposited and circulated in the oil. Therefore an oil filter is often used to clean the oil.

Fog Lights

In fog, you should use fog lights due to limited visibility. They are designed for use in dangerously thick fog. They are completely separate units from regular lights.

Fog light beams are flat and wide, positioned low on the car. Their goal is to cut through fog and light up the road surface so drivers can see the road and stay in lane.

Fog lights are strong - so most places outlaw their use except in severe weather including thick fog. As soon as fog clears or mist dissipates drivers should turn off their fog lights.

Modern vehicles are typically equipped with front and rear fog lights.

Microwave Wattage

Microwave wattage ("microwattage") typically ranges from 700-1200W. The higher the wattage the faster the food cooks.

AA Batteries - 1.5V versus 1.2V

AA batteries come in two voltages - 1.5V and 1.2V which is more common on rechargeables. Most modern electronic equipment should take into account the lower voltage of rechargeable batteries.

Duracell make a rechargeable AA HR6/NiMH at 1.2V (the prefix HR refers to rechargeable batteries, as compared to LR which are standard alkaline batteries). They last 25 hours in a wireless game controller based on an ANSI Digital Audio test.

Duracell Rechargeables AA-type come in two varieties - 2400mAh which is called Rechargeable Ultra and Rechargeable Plus which is 1300 mAh. The Ultra and Plus are not marked on the batteries themselves, but the mAh are. From a buyer's perspective, the higher the mAh the longer the battery will last. An analogy is the size of a gas tank. A possible way to increase mAh is to increase the strength of the electrolytic solution in the battery. They are made in Japan.

NiMH stands for Nickel metal-hydride and these types of batteries were invented in 1967. The European Union Battery Directive caused NiMH batteries to replace Ni-Cd batteries for portable consumer use. Metal hydrides are metals bonded with hydrogen often in a covalent bond, where atoms share electrons.

What is a Ballast in terms of light fittings?

The ballast regulates the current to the lamps and provides enough voltage to start the lamps in a fluorescent lighting system.