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Sliva [168]
2 years ago
5

The pressure on 200 mL of a gas is reduced from 80 kPa to 40 kPa. The final volume is Page

Physics
1 answer:
pochemuha2 years ago
8 0

Answer:

400mL

Explanation:

According to Boyle's law;

PV= k

P1V1 = P2V2

P are the pressures

V are the volumes

V1 = 200mL

P1 = 80kPa

P2 = 40kPa

Required

V2

V2 = P1V1/P2

V2 = 80*200/40

V2 = 2 * 200

V2 = 400mL

Hence the final volume is 400mL

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If the moment acting on the cross section is M=630N⋅m, determine the maximum bending stress in the beam. Express your answer to
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Answer:

2.17 Mpa

Explanation:

The location of neutral axis from the top will be

\bar y=\frac {(240\times 25)\times \frac {25}{2}+2\times (20\times 150)\times (25+(\frac {150}{2}))}{(240\times 25)+2\times (20\times 150)}=56.25 mm

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Therefore, moment of inertia will be

\frac {240\times 25^{3}}{12}+(240\times 25)\times (56.25-25/2)^{2}+2\times [\frac {20\times 150^{3}}{12}+(20\times 150)\times ((25+150/2)-56.25)^{2}]=34.5313\times 10^{6} mm^{4}}

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Comparing the two stresses, the maximum stress occurs at the bottom and is 2.17 Mpa

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3 years ago
Two particles, each with charge Q, and a third charge q, are placed at the vertices of an equilateral triangle as shown. The tot
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Answer:

<em>D. The total force on the particle with charge q is perpendicular to the bottom of the triangle.</em>

Explanation:

The image is shown below.

The force on the particle with charge q due to each charge Q = \frac{kQq}{r^{2} }

we designate this force as N

Since the charges form an equilateral triangle, then, the forces due to each particle with charge Q on the particle with charge q act at an angle of 60° below the horizontal x-axis.

Resolving the forces on the particle, we have

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The above indicates that there is no resultant force in the x-axis, since it is equal to zero (N_{x} = 0).

The total force is seen to act only in the y-axis, since it only has a y-component equivalent to 1.732 times the force due to each of the Q particles on q.

<em>The total force on the particle with charge q is therefore perpendicular to the bottom of the triangle.</em>

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3 years ago
Two identical balls collide one was initially at rest. after the collision one of the balls has a velocity of 3 m/s south. the o
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Two identical balls collide<span> head on. The </span>initial velocity<span> of </span>one<span> is 0.75 </span>m/s<span> east, while that of the </span>other one<span> is 0.43 </span>m/s west<span>.</span>
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