Forces in the universe that act over long distance, meaning the distance is greater than the diameter of the nucleus of the atom are:
1. Electrostatic force or Coulomb force: Fc=(k*Q₁*Q₂)/r²,
2. Gravitational force: Fg=(G*m₁*m₂)/r²,
3. Magnetic force: Fm=qvB,
4. London dispersion force, also known as one of the van der Waals forces.
Answer:
The value is ![t = 689.029 \ hours](https://tex.z-dn.net/?f=t%20%3D%20689.029%20%5C%20%20hours%20%20)
Explanation:
From the question we are told that
The molar mass of hydrazine is ![Z = 32 g/mol = \frac{32}{1000} = 0.032 \ kg/mol](https://tex.z-dn.net/?f=Z%20%3D%20%2032%20g%2Fmol%20%3D%20%5Cfrac%7B32%7D%7B1000%7D%20%3D%200.032%20%5C%20%20kg%2Fmol)
The initial temperature is ![T_i = -186 ^o F = (-186-32) *\frac{5}{9} +273.15 = 152\ K](https://tex.z-dn.net/?f=T_i%20%20%3D%20%20-186%20%5Eo%20F%20%3D%20%28-186-32%29%20%2A%5Cfrac%7B5%7D%7B9%7D%20%2B273.15%20%3D%20152%5C%20K)
The final temperature is ![T_f = 78 ^o F = (78-32) *\frac{5}{9} +273.15 = 298.7 \ K](https://tex.z-dn.net/?f=T_f%20%20%3D%20%2078%20%5Eo%20F%20%3D%20%2878-32%29%20%2A%5Cfrac%7B5%7D%7B9%7D%20%2B273.15%20%3D%20298.7%20%5C%20K)
The specific heat capacity is ![c_h = 0.099 [kJ/(mol K)] = 0.099 *10^3 J/(mol/K)](https://tex.z-dn.net/?f=c_h%20%20%3D%20%200.099%20%5BkJ%2F%28mol%20K%29%5D%20%3D%200.099%20%2A10%5E3%20J%2F%28mol%2FK%29)
The power available is ![P = 300 \ W](https://tex.z-dn.net/?f=P%20%3D%20300%20%5C%20W)
The mass of the fuel is ![m = 1640 \ kg](https://tex.z-dn.net/?f=m%20%3D%20%20%201640%20%5C%20%20kg)
Generally the number of moles of hydrazine present is
![n = \frac{m}{Z}](https://tex.z-dn.net/?f=n%20%20%3D%20%20%5Cfrac%7Bm%7D%7BZ%7D)
=> ![n = \frac{1640}{= 0.032}](https://tex.z-dn.net/?f=n%20%20%3D%20%20%5Cfrac%7B1640%7D%7B%3D%200.032%7D)
=> ![n = 51250 \ mol](https://tex.z-dn.net/?f=n%20%20%3D%20%2051250%20%5C%20mol)
Generally the quantity of heat energy needed is mathematically represented as
=>
=>
Generally the time taken is mathematically represented as
![t = \frac{Q}{P}](https://tex.z-dn.net/?f=t%20%3D%20%20%5Cfrac%7BQ%7D%7BP%7D)
=> ![t = \frac{7.441516913 * 10^{8} }{300}](https://tex.z-dn.net/?f=t%20%3D%20%20%5Cfrac%7B7.441516913%20%2A%2010%5E%7B8%7D%20%7D%7B300%7D)
=> t = 2480505.6377 s
Converting to hours
![t = \frac{2480505.6377}{3600}](https://tex.z-dn.net/?f=t%20%3D%20%5Cfrac%7B2480505.6377%7D%7B3600%7D)
=> ![t = 689.029 \ hours](https://tex.z-dn.net/?f=t%20%3D%20689.029%20%5C%20%20hours%20%20)
Answer:
2700
Explanation:
because calculate the minute1=60×45=2700