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mina [271]
3 years ago
14

Which of the following is correct regarding the principal stresses and maximum in-plane shear stresses? a. Principal stresses ca

nnot be negative. b. The shear stress over principal stress planes is always zero.c. A principal stress plane can be reached by rotating the maximum in-plane shear stress plane 90° in the clockwise direction. d. The maximum in-plane shear stress is always smaller than principal stresses.
Engineering
1 answer:
ziro4ka [17]3 years ago
4 0

Answer:

option B.

Explanation:

The correct answer is option B.

Principal stress is the maximum normal stress a body can have. In principal stress, there is purely normal stress. On principal plane shear stress is zero.

In-plane shear stress are the shear stress which is acting on the plane.

The statement which is correct regarding principle plane and shear stress is that The shear stress over principal stress planes is always zero.

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Answer:

minimum electric power consumption of the fan motor is 0.1437 Btu/s

Explanation:

given data

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air density = 0.075 lbm/ft³

to find out

minimum electric power consumption of the fan motor

solution

we know that energy balance equation that is express as

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E in = E out

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minimum electric power consumption of the fan motor is 0.1437 Btu/s

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3 years ago
A 1000 kg turbine has a rotating unbalance of 0.1 kg.m. The turbine operates at a speed between 500 to 750 rpm. What is the maxi
raketka [301]

Answer:

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Explanation:

mean speed of rotation =\frac{N_1 +N_2}{2}

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w =\frac{2\pi Nm}{60}

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F_T = mw^2 e

F_T = mew^2

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F_T =428.36 N

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SOLVING FOR Wn

Wn = 42 rad/sec

Wn = \sqrt {\frac{k}{m}

k = m*W^2_n

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k =1764 kN-m

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Hey answr this sajida Yusof
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