The speed at the sound barrier is 343 m/s
Answer:
both caused by physical vibrations
The best type of electromagnetic wave to use to warm food that is safe would be the infrared wave. The correct answer is B.
Hey there!
We are given ,
Acceleration, a = -2m/s^2
Initial velocity , u = 15m/s
Time , t = 5 seconds
We know that ,
V=u+at
Now , final speed ,
V = 15+(-2)(5)
V = 15-10
V = 5 m/s -> final speed
Hope this helps you dear :)
Have a good day <3
