Calculate the fraction of vacancies (Nv/N) given the following: Temperature 701 in kelvin, ΔHv=100kJ/mol, R=8.314J/mol. K. Use equation 4.3 from the textbook. Type answer in exponential form (e. g. 1.00e-11) round to two decimal points

The answer is 3.89x10^-8

Explanation:

The term vacant is used in crystallography to indicate a defect in a crystal. The crystals naturally have imperfections. A defect in which an atom is missing is called a vacancy defect, or Schottky's defect.

The temperature depends of the vacancy density, we have:

NV/N = A*e^-(ΔHv/R*T) = 1.1*e^(-100000/(8.314*701)) = 3.89x10^-8

when insulating materials rub against each other, they may become electrically charged . electrons , which are negatively charged, may be 'rubbed off' one material and on to the other. the material that gains electrons becomes negatively charged. the material that loses electrons is left with a positive charge.

here we know that ball will drop down by total distance 3.2 m

so here we know that

now using kinematics

now in the same time it will cover horizontal distance of 0.75 m

so speed of the ball will be