F = ma
F/m = a
Acceleration, a = F/m = Force / Mass
a) Mass
Answer:
a) 30.84m/s
b) 348.32Hz
c) 32.34m/s
d) 289.69Hz
Explanation:
a) If 1 mile=1609,34m, and 1 hour=3600 seconds, then 69mph=69*1609.34m/3600s=30.84m/s
b) Based on Doppler effect:
/*I will take as positive direction the vector
*/
![f_{observed}=(\frac{v_{sound}-v_{observed}}{v_{sound}-v_{emited}})f_{emited}](https://tex.z-dn.net/?f=f_%7Bobserved%7D%3D%28%5Cfrac%7Bv_%7Bsound%7D-v_%7Bobserved%7D%7D%7Bv_%7Bsound%7D-v_%7Bemited%7D%7D%29f_%7Bemited%7D)
![f_{observed}=(\frac{343m/s-0m/s}{343m/s-30.84m/s})317Hz=348.32Hz](https://tex.z-dn.net/?f=f_%7Bobserved%7D%3D%28%5Cfrac%7B343m%2Fs-0m%2Fs%7D%7B343m%2Fs-30.84m%2Fs%7D%29317Hz%3D348.32Hz)
c) ![350Hz=(\frac{343m/s-0m/s}{343m/s-v_{ambulance}})317Hz, V_{ambulance}=343m/s-\frac{317Hz}{350Hz}.343m/s=32.34m/s](https://tex.z-dn.net/?f=350Hz%3D%28%5Cfrac%7B343m%2Fs-0m%2Fs%7D%7B343m%2Fs-v_%7Bambulance%7D%7D%29317Hz%2C%20V_%7Bambulance%7D%3D343m%2Fs-%5Cfrac%7B317Hz%7D%7B350Hz%7D.343m%2Fs%3D32.34m%2Fs)
d) ![f_{observed}=(\frac{343m/s-0m/s}{343m/s+32.34m/s})317Hz=289.69Hz](https://tex.z-dn.net/?f=f_%7Bobserved%7D%3D%28%5Cfrac%7B343m%2Fs-0m%2Fs%7D%7B343m%2Fs%2B32.34m%2Fs%7D%29317Hz%3D289.69Hz)
Answer:
2ed law
Explanation:
i just looked it hope it helps
Explanation:
Below is an attachment containing the solution.
100/2.5 because power=energy/time