Answer: The average speed of an object is defined as the distance traveled divided by the time elapsed. Velocity is a vector quantity, and average velocity can be defined as the displacement divided by the time
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Answer:
The electricity produced from the main source which is an electrical generator which is usually close a remote abundant source of natural energy or at a distant location away from the residential areas where the electricity is used
The step up transformer is the device used to raise the voltage and therefore lower the current of the of incoming generated electricity before it is transmitted through high tension cables so that the energy loss from source to destination is reduced and the electricity generated can applied where needed
However, the high voltage transmitted along power lines to reduce energy loss cannot be used as it is by the consumer, partly because it is very harmful in the event of an electric shock and can easily damage household electrical devices, therefore, the high voltage in the power lines is reversed back or lowered into voltages which can be used to power electrical devices in buildings with the use of a step-down transformer
Explanation:
Answer:
The number of vacancies per cubic meter is 1.18 X 10²⁴ m⁻³
Explanation:
![N_v = N*e[^{-\frac{Q_v}{KT}}] = \frac{N_A*\rho _F_e}{A_F_e}e[^-\frac{Q_v}{KT}}]](https://tex.z-dn.net/?f=N_v%20%3D%20N%2Ae%5B%5E%7B-%5Cfrac%7BQ_v%7D%7BKT%7D%7D%5D%20%3D%20%5Cfrac%7BN_A%2A%5Crho%20_F_e%7D%7BA_F_e%7De%5B%5E-%5Cfrac%7BQ_v%7D%7BKT%7D%7D%5D)
where;
N
is the number of atoms in iron = 6.022 X 10²³ atoms/mol
ρFe is the density of iron = 7.65 g/cm3
AFe is the atomic weight of iron = 55.85 g/mol
Qv is the energy vacancy formation = 1.08 eV/atom
K is Boltzmann constant = 8.62 X 10⁻⁶ k⁻¹
T is the temperature = 850 °C = 1123 k
Substituting these values in the above equation, gives
![N_v = \frac{6.022 X 10^{23}*7.65}{55.85}e[^-\frac{1.08}{8.62 X10^{-5}*1123}}]\\\\N_v = 8.2486X10^{22}*e^{(-11.1567)}\\\\N_v = 8.2486X10^{22}*1.4279 X 10^{-5}\\\\N_v = 1.18 X 10^{18}cm^{-3} = 1.18 X 10^{24}m^{-3}](https://tex.z-dn.net/?f=N_v%20%3D%20%5Cfrac%7B6.022%20X%2010%5E%7B23%7D%2A7.65%7D%7B55.85%7De%5B%5E-%5Cfrac%7B1.08%7D%7B8.62%20X10%5E%7B-5%7D%2A1123%7D%7D%5D%5C%5C%5C%5CN_v%20%3D%208.2486X10%5E%7B22%7D%2Ae%5E%7B%28-11.1567%29%7D%5C%5C%5C%5CN_v%20%3D%208.2486X10%5E%7B22%7D%2A1.4279%20X%2010%5E%7B-5%7D%5C%5C%5C%5CN_v%20%3D%201.18%20X%2010%5E%7B18%7Dcm%5E%7B-3%7D%20%3D%201.18%20X%2010%5E%7B24%7Dm%5E%7B-3%7D)
Therefore, the number of vacancies per cubic meter is 1.18 X 10²⁴ m⁻³
Answer:
How is high-speed internet typically transmitted around the world? over telephone wires b. through fiber optic cables c. beamed wirelessly to homes d via satellites
Explanation:
Explanation:
i think you have to find the velocity by using its wight times the gravity of the earth times the distance it fell?
look in google for a formula the use these sign, w and g ,d
