Special Topic on Supersonics The speed of sound in air at 15°C is 340 meters per second, which is approximately 1224 kilometers per hour. Supersonic speed refers to a state where the speed is greater than 340 meters per second. Speeds less than 340 meters per second are called subsonic speeds. Speeds equal to 340 meters per second are transonic speeds. The speed of sound will vary due to differences in temperature or air pressure. Hypersonic definition: It is generally believed that a speed greater than 5 times the speed of sound is called hypersonic. Click to view ios software Ultrasound errands 2024-12-31 Life services | 28.2 MB | 1 View Related articles How to use Meituan Errands - Introduction to the functions and usage of Meituan Errands How to apply as a Meituan errand boy - The operation process of applying as a Meituan errand boy How to charge for Meituan errands - Introduction to the charging rules of Meituan errands Where to place an order for Meituan Errands - How to place an order for Meituan Errands How to consult online customer service for Sunshine College Entrance Examination? -Operation process of Sunshine College Entrance Examination Consultation Online Customer Service How to check universities in Sunshine College Entrance Examination? -How to check universities in Sunshine College Related topics Xiaohongshu special area collection korean drama tv Nice video acfun Olympic Games Live Kuaishou download