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.
The Rayleigh wave EncyclopÃ¦dia Britannica, Inc. earthquakes: types of seismic waves Seismic waves travel in different patterns and at different speeds through the Earth. The most damaging are the surface typesâthe Love waves and the Rayleigh waves. EncyclopÃ¦dia Britannica, Inc. Learn about this topic in these articles: characteristics. In seismic wave â¦principal surface waves are called Rayleigh waves after the British physicist Lord Rayleigh, who first mathematically demonstrated their existence.