2. Your credit score. Different people can be eligible for different interest rates. When you apply for a credit card, the credit card company checks your credit score to see if you are a good credit risk, and if your score is good, youâll be eligible for the best (lowest) interest rates.f you do not pay your credit bills on time, your credit card company can (and usually will) increase your interest rate. The amount that it gets increased depends on the individual situation, but it can be quite a lot.
hypersonic: Of, relating to, or capable of speed equal to or exceeding five times the speed of sound.
subsonic: A vehicle that is traveling slower than the speed of sound (M. supersonic: sound barrier: The term sound barrier is often associated with supersonic flight. In particular, breaking the sound barrier is the process of accelerating through Mach 1 and going from subsonic to supersonic speeds.asic Definitions: speed of sound: The speed of sound is a basic property of the atmosphere that changes with temperature. For a given set of conditions, the speed of sound defines the velocity at which sound waves travel through a substance, such as air.