Shiny reflective clothing allows a firefighter to get closer to a fire. What type of heat transfer is reduced because of this ma
1 answer:
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Answer: 17.59 Hz and 4.87 m
Explanation:
The fundamental frequency of the sound from an open-open pipe is given as
f=
where v= 343 m/s
L= 32 feet= = 9.75 m
So,
f= = 17.59 Hz
The length of open-closed tube is related to frequency by formula
f=
or L=
L=
L= 4.87 m
Answer:
26.67 s
Explanation:
v = Velocidad final = 40 m/s
u = Velocidad inicial = 20 m/s
= Tiempo inicial = 20 s
= Tiempo empleado durante la aceleración
a = Aceleración
s = Desplazamiento del automóvil durante la aceleración = 200 m
De las ecuaciones lineales de movimiento tenemos
El tiempo necesario para acelerar es 6.67 s
El tiempo total necesario para toda la ruta es .