Answer:
polar covalent bonds
Explanation:
Phosphorus trichloride is a chemical compound of phosphorus and chlorine, having the chemical formula PCl 3. It has a trigonal pyramidal shape, owing to the lone pairs of electrons on the phosphorus atom.
Chlorine is more elctronegative than phosphorus . Phosphorus has a lone pair of electrons and every chlorine atom has three pairs of electrons . The molecule is not symmetrical as the shared electron pairs are closer to the chlorine atoms than the phosphorus atoms , the chlorine atoms are shifted towards one side of the center of the molecule , thus a net dipole effect is created. This is the reason why the molecule is polar .
Answer is: heat energy.
Braking is the process of controlling the velocity of an object (in this example bicycle) by inhibiting its motion.
Mechanical energy can be either kinetic or potential energy and has to do with the energy of position and motion of an object.
Kinetic energy is energy of the speed of an object and how much mass it has; basically how the object is moving.
Potential energy is type of energy is stored energy; it can be increased by getting into a higher position and/or stretching an object such as a rubber band.
A mechanical brake applies a friction force to convert the kinetic energy of the bicycle into heat energy which then dissipates into the atmosphere.
Answer:
Thus, the pollutant concentration in lake will be reduced to 0.2% after 6.931471 days
Explanation:
From the information given:
A(t) = amount of pollutant for time (t)
A 4 billion cubic ft is the same as 4000 million cubic ft:
∴
The Initial amount of pollutant is ![A_o = (\dfrac{0.4}{100})\times 4000](https://tex.z-dn.net/?f=A_o%20%3D%20%28%5Cdfrac%7B0.4%7D%7B100%7D%29%5Ctimes%204000)
![A_o = 16 \ million \ cubic \ feet](https://tex.z-dn.net/?f=A_o%20%3D%2016%20%5C%20million%20%5C%20cubic%20%5C%20feet)
However;
the pollutant rate (input) = 400 × 0 = 0
the pollutant rate (output) = ![400( \dfrac{A(t)} {4000})](https://tex.z-dn.net/?f=400%28%20%5Cdfrac%7BA%28t%29%7D%20%7B4000%7D%29)
![= 1( \dfrac{A(t)} {10})](https://tex.z-dn.net/?f=%3D%201%28%20%5Cdfrac%7BA%28t%29%7D%20%7B10%7D%29)
The net rate = ![A'(t) = 0 - 1( \dfrac{A(t)} {10})](https://tex.z-dn.net/?f=A%27%28t%29%20%3D%200%20-%201%28%20%5Cdfrac%7BA%28t%29%7D%20%7B10%7D%29)
![\implies A'(t) = - 1( \dfrac{A(t)} {10})](https://tex.z-dn.net/?f=%5Cimplies%20A%27%28t%29%20%3D%20-%201%28%20%5Cdfrac%7BA%28t%29%7D%20%7B10%7D%29)
![\implies \dfrac{1}{A(t)}A'(t) = -(\dfrac{1}{10})](https://tex.z-dn.net/?f=%5Cimplies%20%5Cdfrac%7B1%7D%7BA%28t%29%7DA%27%28t%29%20%3D%20-%28%5Cdfrac%7B1%7D%7B10%7D%29)
![\implies \int (\dfrac{1}{A(t)}A'(t) ) dt = \int -(\dfrac{1}{10}) dt](https://tex.z-dn.net/?f=%5Cimplies%20%5Cint%20%28%5Cdfrac%7B1%7D%7BA%28t%29%7DA%27%28t%29%20%29%20dt%20%3D%20%5Cint%20%20-%28%5Cdfrac%7B1%7D%7B10%7D%29%20dt)
![\implies In (A(t)) = -(\dfrac{1}{10})t + c](https://tex.z-dn.net/?f=%5Cimplies%20In%20%28A%28t%29%29%20%3D%20-%28%5Cdfrac%7B1%7D%7B10%7D%29t%20%2B%20c)
![\implies A(t) = e^{-(\dfrac{1}{10})t+c}](https://tex.z-dn.net/?f=%5Cimplies%20%20A%28t%29%20%3D%20e%5E%7B-%28%5Cdfrac%7B1%7D%7B10%7D%29t%2Bc%7D)
![\implies A(t) = Ce^{-\dfrac{1}{10}^t}](https://tex.z-dn.net/?f=%5Cimplies%20A%28t%29%20%3D%20Ce%5E%7B-%5Cdfrac%7B1%7D%7B10%7D%5Et%7D)
A(0) = 16
![\implies Ce^{ -(1/20)^0} = 16 \\ \\ C = 16](https://tex.z-dn.net/?f=%5Cimplies%20Ce%5E%7B%20-%281%2F20%29%5E0%7D%20%3D%2016%20%5C%5C%20%5C%5C%20%20C%20%3D%2016)
![\implies A(t) = 16e^{(-1/10)t}](https://tex.z-dn.net/?f=%5Cimplies%20A%28t%29%20%3D%2016e%5E%7B%28-1%2F10%29t%7D)
![0.2\% \ pollutant = (\dfrac{0.2}{100})*4000 =8 \ million \ cubic \ feet](https://tex.z-dn.net/?f=0.2%5C%25%20%5C%20pollutant%20%3D%20%28%5Cdfrac%7B0.2%7D%7B100%7D%29%2A4000%20%3D8%20%5C%20%20million%20%20%5C%20cubic%20%20%5C%20feet)
A(t) = 8
![\implies 16e^{(-1/10)t}= 8 \\ \\ \implies e^{1/10)t} = 2 \\ \\ (\dfrac{1}{10} )^t = In(2) \\ \\ t = 10\ In(2) \\ \\ \mathbf{ t = 6.931471}](https://tex.z-dn.net/?f=%5Cimplies%2016e%5E%7B%28-1%2F10%29t%7D%3D%208%20%20%5C%5C%20%5C%5C%20%5Cimplies%20%20e%5E%7B1%2F10%29t%7D%20%3D%202%20%5C%5C%20%5C%5C%20%20%28%5Cdfrac%7B1%7D%7B10%7D%20%29%5Et%20%3D%20In%282%29%20%20%5C%5C%20%5C%5C%20%20t%20%3D%2010%5C%20In%282%29%20%5C%5C%20%5C%5C%20%5Cmathbf%7B%20t%20%3D%206.931471%7D)
Answer:
Iron gains three electrons.
Answer:
it make poisionus police come and took away