4 years ago

Please help with explanation!! thanks

1 answer:

6 0

Efficiency = useful energy out / total energy in

Message back and I will help you answer the questions.

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sasho [114]

7000 N / 0,4m^2 = 17 500 Pa.

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3 years ago

Vladimir [108]

24-15=9 m/s slower in 12 seconds. So 9/12 m/s² slower. Therefore the acceleration is -0,75 m/s²

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Vladimir79 [104]

E, 63% of the value. I forget the rationale behind it but I learnt that in engineering. 90% confident for that answer.

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4 years ago

BlackZzzverrR [31]

Resultant force= (2*6^2)^(1/2)
=8.5m/s
answer is B.

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4 years ago

Gnoma [55]

Length of the pipe = 0.39 m

Third harmonic frequency = 1400 Hz

For the third harmonic:

Wavelength = $\frac{2L}{3}$

The center of the open pipe will host a node and the nearest anti - node from the center will be at the 0.25 × wavelength

Distance from center = 0.25 × wavelength

Distance = $0.25 x \frac{2L}{3}$

Plugging the value of the length of the pipe (L) = 0.39 m = 39 cm

Distance = $0.25 x \frac{2 \times 39}{3}$

Distance from the center to the nearest anti - node = 6.5 cm

Hence, the nearest distance to the anti - node from the center = 6.5 cm

So, option C is correct.

7 0

3 years ago