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KiRa [710]
3 years ago
7

COMO ES LA MADERA CUANDO LA TIERRA ES HUMEDA

Engineering
2 answers:
attashe74 [19]3 years ago
5 0
No se queda igual? Oh no :/
Alexus [3.1K]3 years ago
4 0

Answer:

La madera es un material higroscópico, lo que significa que es un material que absorbe agua

Explanation:.

En un uso normal, el contenido de humedad de la madera oscila entre el 8 % y el 25 % según su peso, dependiendo de la humedad relati del aire.

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4 years ago
A 4-pole, 3-phase induction motor operates from a supply whose frequency is 60 Hz. calculate: 1- the speed at which the magnetic
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Answer:

The answer is below

Explanation:

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n_s=\frac{120f_s}{p}\\ Where\ p\ is \ the \ number\ of\ machine\ pole, f_s\ is\ the\ supply \ frequency\\and\ n_s\ is \ the \ synchronous\ speed(speed \ of\ stator\ magnetic \ field)\\Given: f_s=60\ Hz, p=4. Therefore\\\\n_s=\frac{120*60}{4}=1800\ rpm

2) The speed of the rotor is the motor speed. The slip is given by:

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3) The frequency of the rotor is given as:

f_r=slip*f_s\\f_r=0.04*60=2.4\ Hz

4) At standstill, the speed of the motor is 0, therefore the slip is 1.

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6 0
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