Physics, 18.01.2021 17:00, Hunter1471
1. Lightning is seen 3 seconds before a thunder. How far away has the thunder
taken place? Take velocity of the sound = 340 m/s.
2. Ultrasonic waves are used to locate a sunken ship under the sea. If the reflected wave is received by the receiver after 12 seconds, how far is the ship
under water? Take the velocity of sound in water as 1450 m/s.
3. How is SONAR method different from RADAR method?
4. State three uses of ultrasound.
5.Exlain the following:
(a) Sounds are heard clear at night.
(b) Nocturnal animals can find their prey in darkness.
Answers: 3
Physics, 22.06.2019 10:00, nayellisoto15
Asap and show ! a 14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earths velocity. earth mass is 6.0 * 10^24 kg. show your work assuming the rock earth system is closed.
Answers: 2
Physics, 22.06.2019 13:00, maiahfogel1351
Which of the following are appropriate acceleration units?
Answers: 1
Physics, 22.06.2019 17:20, treaustin6978
Could we see a galaxy that is 20 billion light-years away?
Answers: 1
1. Lightning is seen 3 seconds before a thunder. How far away has the thunder
taken place? Take...
taken place? Take...
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