Answer and explanation:
The right answer is b) "The excess charge has distributed itself evenly over the outside surface of the sphere".
The hollow metal sphere is a conductor. This means that charges can move freely over its surface. On the other side, a metal body act as an equipotential body. Once some charge is set and there is no voltage differential imprinted over the body, to keep being an equipotential body the charges must distribute evenly on the external surface. Must not exist charge in the volume, or would exist an electrical field and therefore a voltage differential. Also, the charge distribution in the internal surface must be null. If you apply gauss theorem with a gaussian sphere with a radius between the internal and external surface, knowing that field E is null, the enclosed charge must be null.
It must displace at least 500 milliliters (0.5 liter) of water, in order to float in water.
Answer:
5.06 m/s
Explanation:
velocity = distance / time
= ( 25.6 - - 14.4) / 7.90 = 5.06 m/s
To solve this problem it is necessary to apply the relationship given by the intrinsic carrier concentration, in each of the phases.
The intrinsic carrier concentration is the number of electrons in the conduction band or the number of holes in the valence band in intrinsic material. This number of carriers depends on the band gap of the material and on the temperature of the material.
In general, this can be written mathematically as
Both are identical semiconductor but the difference is band gap which is:
The ratio between the two phases are given as:
Therefore the ratio of intrinsic carrier densities for the two materials at room temperature is 0.145
<span>Flashlight should be carried to help avoid a collision, when paddling a canoe at night.
There are some rules and skills for paddling a canoe. So, before paddling you should know everything about it. Canoeing is not easy as it looks and not everyone can paddle a canoe. A strong stroke is a fundamental rule of Canoeing.</span>
