That is true imo not false
Answer:

Explanation:
Given


Required
Determine the speed of the jet
The speed is calculated as:

Substitute 4800 km for Distance and 6hr for Time


<em>Hence, the speed of the commercial jet is 800km/hr</em>
Answer:
The second is correct.
Explanation:
Try with a magnet and experiment. You'll find out
Answer:The loudest of the two sound wave is second one
Explanation:because if shout the sound go high,then which one show you the highest the second one rigth