Vibrations associated with sinusoidal motion occur in a plane tilted towards the vertical. A wave pattern's vibration is determined by its frequency and amplitude. The sieve may move up and down or left and right. No. While you may see ads in your no-cost Gmail account, your emails are private. https://www.saludcapital.gov.co/sitios/VigilanciaSaludPublica/Lists/Contactenos/DispForm.aspx?ID=2972663