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3 years ago

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An aluminium bar 600mm long1 with diameter 40mm, has a hole drilled in the centre of the bar. The hole is 30mm in diameter and i

s 100mm long. If the modulus of elasticity for the aluminium is 85GN/M^2 Calculate the total contraction on the bar due to a compressive load of 180KN

1 answer:

nexus9112 [7]3 years ago

6 0

Answer:

Total contraction = 1.2277 mm

Explanation:

the solution is given in the picture below and it is more explanatory

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Answer:

The energy is $9.4\times10^{-21}\ J$

(a) is correct option

Explanation:

Given that,

Energy = 4480 j

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Boil temperature = 77 K

Pressure = 1 atm

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Using first law of thermodynamics

$Q=\Delta U+W$

$Q=\Delta U+nRT$

Put the value into the formula

$4480=\Delta U+\dfrac{20}{28}\times8.314\times77$

$\Delta U=4480-\dfrac{20}{28}\times8.314\times77$

$\Delta U=4022.73\ J$

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Using formula of number of molecules

$N=n\times \text{Avogadro number}$

Put the value into the formula

$N=\dfrac{20}{28}\times6.02\times10^{23}$

$N=4.3\times10^{23}$

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Using formula of energy

$E=\dfrac{\Delta U}{N}$

Put the value into the formula

$E=\dfrac{4022.73}{4.3\times10^{23}}$

$E=9.4\times10^{-21}\ J$

Hence, The energy is $9.4\times10^{-21}\ J$

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If a single constant force acts on an object that moves on a straight line, the object's velocity is a linear function of time.

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Answer:

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Explanation:

Given that

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$\dfrac{dv}{dt}=0-k\dfrac{dx}{dt}$

We know that

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So the magnitude of force F

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I believe there should be some sort of table attached. Unfortunately I cannot answer this question. Sorry!

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Answer:

(D) Inertia

Explanation:

Inertia words with Gravity to keep the Moon, Earth and Sun All in Orbit!

<em>-Aslina</em>

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Light from a fluorescent lamp is observed through a cloud of cool nitrogen gas. Again, two students are having a discussion abou

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Answer:

From the previous explanation Student No. 1 has the correct explanation

Explanation:

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