For example, if a buyer obtains a seven-year balloon mortgage to purchase a home, he has seven years of equal monthly payments at a fixed interest rate. This rate is often lower than what the buyer would otherwise be able to secure under a traditional mortgage loan.
When sound reflects off a special curved surface called a parabola, it will bounce out in a straight line no matter where it originally hits. Many stages are designed as parabolas so the sound will go directly into the audience, instead of bouncing around on stage.
Examples of Longitudinal Waves. Most waves in the universe turn out to be transverse waves, but there are a few examples of longitudinal waves. The first wave you feel when an earthquake hits is a longitudinal wave -- this is called the primary wave, or P-wave.