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JulsSmile [24]
3 years ago
7

1. The activation energy to form interstitial carbon in iron at room temperature is around 0.77 eV, and in vanadium at room temp

erature, it is slightly less at 0.74 eV. a. Why the difference? Consider the physical differences between atoms of these two elements.
Physics
1 answer:
creativ13 [48]3 years ago
5 0

Answer Explanation:

The activation energy to form carbon in iron at room temperature is around 0.77eV, and in vanadium at room temperature it is slightly less at 0.74eV

this is occur due to the following reason that are.

  • carbon has the diffusion property and it diffuses in iron and vanadium
  • BCC ( body centered cubic) structure of iron
  • it has different composition this is the main reason
  • different crystal structure of iron

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Answer:

Option (c)

Explanation:

Both the bullets have same acceleration because they both falls under the influence of acceleration due to gravity.

The bullet which is fired from the gun has some initial velocity but the bullet which is dropped has zero initial velocity.

the acceleration is acting on both the bullets which is equal to the acceleration due to gravity and they both in motion in the influence of gravity.

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2 years ago
A force in the +x -direction with magnitude F(x)=18.0N−(0.530N/m)x is applied to a 7.90 kg box that is sitting on the horizontal
dsp73

Answer:

v\approx 8.570\,\frac{m}{s}

Explanation:

The equation of equlibrium for the box is:

\Sigma F_{x} = 18\,N-(0.530\,\frac{N}{m} )\cdot x = (7.90\,kg)\cdot a

The formula for the acceleration, given in \frac{m}{s^{2}}, is:

a = \frac{18\,N-(0.530\,\frac{N}{m} )\cdot x}{7.90\,kg}

Velocity can be derived from the following definition of acceleration:

a = v\cdot \frac{dv}{dx}

v\, dv = a\, dx

\frac{1}{2}\cdot v^{2} = \int\limits^{17\,m}_{0\,m} {\frac{18\,N-(0.530\,\frac{N}{m} )\cdot x}{7.90\,kg} } \, dx

\frac{1}{2}\cdot v^{2} =\frac{18\,N}{7.90\,kg}  \int\limits^{17\,m}_{0\,m}\, dx  - \frac{0.530\,\frac{N}{m} }{7.90\,kg} \int\limits^{17\,m}_{0\,m} {x} \, dx

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The speed after the box has travelled 17 meters is:

v\approx 8.570\,\frac{m}{s}

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