3 years ago

7. Which of the following has the most total mechanical energy?

Physics

1 answer:

maria [59]3 years ago

8 0

Answer:

An airplane flying

Explanation:

Both a bird and airplane fly, but the airplane is using more mechanical energy to run and power the plane, causing it to fly.

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The a992 steel rod bc has a diameter of 50 mm and is used as a strut to support the beam. determine the maximum intensity w of t

EastWind [94]

Answer:

w = 11.211 KN/m

Explanation:

Given:

diameter, d = 50 mm

F.S = 2

L = 3

Due to symmetry, we have:

$Ay = By = \frac{w * 6}{2} = 3w$

$P_c_r = 3w * F.S = 3w * 2.0 = 6w$

$I = \frac{\pi}{64} (0.05)^4 = 3.067*10^-^7$

To find the maximum intensity, w, let's take the Pcr formula, we have:

$P_c_r = \frac{\pi^2 E I}{(KL)^2}$

Let's take k = 1

$E = 200*10^9$

Substituting figures, we have:

$6w = \frac{\pi^2 * 200*10^9 * 3.067*10^-^7}{(1 * 3)^2}$

Solving for w, we have:

$w = \frac{67266.84}{6}$

w = 11211.14 N/m = 11.211 KN/m

Since Area, A= pi * (0.05)²

$\sigma _c_r = \frac{w}{A}$

$\sigma _c_r = \frac{11.211}{\pi (0.05)^2} = 1.4 MPA < \sigma y$ . This means it is safe

The maximum intensity w = 11.211KN/m

3 0

3 years ago

Plz answer this question

Lady_Fox [76]

The answer will be pressure.

Pressure is force per unit area.

8 0

3 years ago

PLEASE HELP ASAP!!!!!!!!!!

Marianna [84]

Hey,

I think the answer's are 1,3

Hope this helpss

~Girlygir101~

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3 years ago

Sir Isaac newton's book on laws of motion and gravity is considered of what significance

Mars2501 [29]

Answer:

Explanation:

a brilliant work on all the principles it open up a whole new world and change the world algebraicly

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3 years ago

What do all magnets have in common? Select all that apply.

tekilochka [14]

Answer:

all magnets have opposite poles (north and south)

magnetic domains are aligned

moving electrons generate a magnetic filed

movement of electrons creates a magnets field

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3 years ago