Explanation :
It is given that,
Length of silicon bar, 
Free electron density, 
Hole density, 
The total current flowing in bar is the sum of drift current due to hole and the electrons.
where, n and p are electron and hole densities.
![J=Eq[n\mu_n+p\mu_p]](https://tex.z-dn.net/?f=J%3DEq%5Bn%5Cmu_n%2Bp%5Cmu_p%5D)
we know that 
So, ![J=\dfrac{V}{l}q[n\mu_n+p\mu_p]](https://tex.z-dn.net/?f=J%3D%5Cdfrac%7BV%7D%7Bl%7Dq%5Bn%5Cmu_n%2Bp%5Cmu_p%5D)
![J=\dfrac{1.6\times 10^{-19}\ C}{0.001\ V}[104\ cm^{-3}\times 1200\ cm^2/V\ s+1016\ cm^{-3}\times 500\ cm^2/V\ s]](https://tex.z-dn.net/?f=J%3D%5Cdfrac%7B1.6%5Ctimes%2010%5E%7B-19%7D%5C%20C%7D%7B0.001%5C%20V%7D%5B104%5C%20cm%5E%7B-3%7D%5Ctimes%201200%5C%20cm%5E2%2FV%5C%20s%2B1016%5C%20cm%5E%7B-3%7D%5Ctimes%20500%5C%20cm%5E2%2FV%5C%20s%5D)
or
Current, 
A is the area of bar, 
So, 
Current, 
<em>So, the current flowing in silicon bar is </em>.
Answer: D. Density of uranium within nuclear fuel rods is insufficient to become explosive
Explanation: Nuclear power plants use the same fuel as nuclear bombs, i.e. radioactive Uranium-235 isotope. However, in a nuclear power plant, the energy is released more slowly unlike in a nuclear bomb. <em>The energy released is through nuclear fission, and radioactive decay occurs at the same rate as in nuclear bombs. therefore, option A, B</em><em> </em><em>and C are incorrect.</em>
The primary reason why nuclear chain reactions within power plants do NOT produce bomb-like explosions is because the uranium fuel rods used in electricity generation is not sufficiently enriched in Uranium-235 to produce a nuclear detonation. This is the same idea in option D which is the correct option.
Answer:
Lateral inversion
Explanation:
When an object is placed in front of a plane mirror, the appearance of the object on the plane mirror appears as a reversal of the object. This effect is known as lateral inversion.
Lateral inversion occurs as a result of the fact that light is reflected by a plane mirror. The image formed by the plane mirror is as far behind the mirror as the object is in front of it. Hence lateral inversion occurs because of the way our brains perceive images on a plane mirror. The mirror image of symmetrical letters and objects do not show lateral inversion.
Answer:
Ft = 0[N]
Explanation:
To understand this problem we must perform an analysis of forces on the X axis, which coincides with the axis of forces of dogs.
In this way performing a sum of forces on the X-axis we will have (newton's third law):
From this analysis we can see that the resulting or total force is equal to zero, since there is no movement.
Answer and Explanation:
The estimation of the mass of the objects is as follows
Given that
The mass of an apple is about 100 g
Just like that, we do some estimation of different objects
A dime is around 1 g
A smartphone is about 100 g
An adult male is approx 100 kg
A college physics textbook is around 1 kg
A ripe banana is around 100 g
A small car is around 1,000 kg
