Answer:
A. the sharing of electrons
Explanation:
Covalent bonds share electrons.
Mechanical waves require matter to travel medium. If there is no substance or matter to travel through, mechanical waves cannot propagate.
Since space is mostly vacuum, there is no medium for waves to travel through: waves sent by the sun (electromagnetic waves) are not mechanical waves
20/.25 is 80, so the car will travel 80 minutes.
Answer:
The value is ![V_n = 2.2498 \ m^3](https://tex.z-dn.net/?f=V_n%20%20%3D%20%202.2498%20%5C%20%20m%5E3)
Explanation:
From the question we are told that
The volume of liquid nitrogen is ![V_n = 3.6 \ L= 3.6 *10^{-3} \ m^3](https://tex.z-dn.net/?f=V_n%20%20%3D%20%203.6%20%5C%20%20L%3D%20%203.6%20%2A10%5E%7B-3%7D%20%5C%20m%5E3)
The density of nitrogen at gaseous form is
= The dry air at sea level
Generally the density of nitrogen at liquid form is
![\rho _l = 808 \ kg/m^3](https://tex.z-dn.net/?f=%5Crho%20_l%20%3D%20808%20%5C%20%20kg%2Fm%5E3)
And this is mathematically represented as
![\rho_l = \frac{m}{V_l }](https://tex.z-dn.net/?f=%5Crho_l%20%20%3D%20%20%5Cfrac%7Bm%7D%7BV_l%20%7D)
=> ![m = \rho_l * V_l](https://tex.z-dn.net/?f=m%20%20%3D%20%20%5Crho_l%20%20%2A%20%20V_l)
Now the density of gaseous nitrogen is
![\rho_n = \frac{m}{V_n }](https://tex.z-dn.net/?f=%5Crho_n%20%20%3D%20%20%5Cfrac%7Bm%7D%7BV_n%20%7D)
=> ![m = \rho_n * V_n](https://tex.z-dn.net/?f=m%20%20%3D%20%20%5Crho_n%20%20%2A%20%20V_n)
Given that the mass is constant
![\rho_n * V_n = \rho_l * V_l](https://tex.z-dn.net/?f=%5Crho_n%20%20%2A%20%20V_n%20%20%3D%20%20%20%5Crho_l%20%20%2A%20%20V_l)
![1.2929* V_n = 808 * 3.6*10^{-3}](https://tex.z-dn.net/?f=1.2929%2A%20%20V_n%20%20%3D%20%20%20808%20%20%2A%20%203.6%2A10%5E%7B-3%7D)
=> ![V_n = 2.2498 \ m^3](https://tex.z-dn.net/?f=V_n%20%20%3D%20%202.2498%20%5C%20%20m%5E3)