Stomach ulcers are sores that form in the lining of your stomach due to erosion of the protective mucus layer. Bacteria called Helicobacter pylori or long-term use of nonsteroidal anti-inflammatory drugs, such as ibuprofen and naproxen, can cause this erosion and expose the lining of your stomach to harmful digestive juices.
Nothing good. Brake fluid is usually much higher density hydraulic fluid as well as different type than is power steering fluid. In vehicles with ABS systems it will damage sensors and seals, and in any vehicle it will result in spongy, poorly operating brakes and damaged seals.
Simply put, power-steering fluid is the hydraulic fluid that transmits the power in power steering. Servicing it involves draining or flushing out your car's old power-steering fluid and then adding fresh power steering fluid. Absolutely. The fluid is the cheapest component of your power-steering system. Changing it can help to prolong the life of other, more expensive power-steering components such as the power-steering pump and the stratospherically expensive power-steering rack.