A boat fitted with sonar is on a lake. It detects an echo 60ms after sending out a pulse. How deep is the lake? (Speed of sound in water = 1500m/s)
A woman claps her hands 50 metres from a high wall. What time delay will there be before she hears the echo?
When does refraction causes sound to travel further over land?
University of Salford, Salford, Greater Manchester M5 4WT, UK. Telephone: +44 (0)161 295 5000 | Fax: +44 (0) 161 295 5999
Contact D.Dewhurst@salford.ac.uk | accessibility statement | privacy statement