Answer:
Explanation:
The work W required for the transfer is equal to the energy difference
![W = \Delta E = q \ \Delta V](https://tex.z-dn.net/?f=W%20%3D%20%5CDelta%20E%20%3D%20q%20%5C%20%5CDelta%20V)
where q is the charge we want to transfer and ΔV is the potential difference.
So, the work needed will be
![W = 9,000 \ C * 220 V](https://tex.z-dn.net/?f=W%20%3D%209%2C000%20%5C%20C%20%2A%20220%20V)
![W = 1,980,000 \ J](https://tex.z-dn.net/?f=W%20%3D%201%2C980%2C000%20%5C%20J)
Now, the average power is:
![< power > = \frac{work}{time}](https://tex.z-dn.net/?f=%3C%20power%20%3E%20%3D%20%5Cfrac%7Bwork%7D%7Btime%7D)
As the Watt is Joule/second, we need the 45 min multiplied by 60:
![time = 45 \ min * 60 \frac{s}{min}](https://tex.z-dn.net/?f=time%20%3D%2045%20%5C%20min%20%2A%2060%20%5Cfrac%7Bs%7D%7Bmin%7D)
![time = 2,700 \ s](https://tex.z-dn.net/?f=time%20%3D%202%2C700%20%5C%20s)
Taking all this together:
![< power > = \frac{1,980,000 \ J}{2,700 \ s}](https://tex.z-dn.net/?f=%3C%20power%20%3E%20%3D%20%5Cfrac%7B1%2C980%2C000%20%5C%20J%7D%7B2%2C700%20%5C%20s%7D)
![< power > = \frac{1,980,000 \ J}{2,700 \ s}](https://tex.z-dn.net/?f=%3C%20power%20%3E%20%3D%20%5Cfrac%7B1%2C980%2C000%20%5C%20J%7D%7B2%2C700%20%5C%20s%7D)
![< power > = 733.333 \ W](https://tex.z-dn.net/?f=%3C%20power%20%3E%20%3D%20733.333%20%5C%20W)
or
![< power > = 0.733 \ kW](https://tex.z-dn.net/?f=%3C%20power%20%3E%20%3D%200.733%20%5C%20kW)
The mass of the baked loaf will be less than the original dough. In making dough for bread, we have ingredients that are liquid such as water, melted butter, food flavoring, etc. All of this liquid ingredients mixed on the dough will definitely turn into vapor. This vapor is responsible for releasing of the aroma of the freshly baked bread.
Answer:
Explanation:
Given
Let us suppose police car and motorist travel in straight line and police car catches motorist after s distance
Distance travel by motorist
----1
Distance traveled by Police car
![s=ut+\frac{at^2}{2}](https://tex.z-dn.net/?f=s%3Dut%2B%5Cfrac%7Bat%5E2%7D%7B2%7D)
![s=0+\frac{a_pt^2}{2}](https://tex.z-dn.net/?f=s%3D0%2B%5Cfrac%7Ba_pt%5E2%7D%7B2%7D)
----2
from 1 & 2 we get
![t=\frac{2v_m}{a_p}](https://tex.z-dn.net/?f=t%3D%5Cfrac%7B2v_m%7D%7Ba_p%7D)
(a)Velocity of Police car after t sec
![v=u+a_pt](https://tex.z-dn.net/?f=v%3Du%2Ba_pt)
![v=0+a_p\times \frac{2v_m}{a_p}](https://tex.z-dn.net/?f=v%3D0%2Ba_p%5Ctimes%20%5Cfrac%7B2v_m%7D%7Ba_p%7D)
![v=2v_m](https://tex.z-dn.net/?f=v%3D2v_m)
(b)time taken by police car is
![t=\frac{2v_m}{a_p}](https://tex.z-dn.net/?f=t%3D%5Cfrac%7B2v_m%7D%7Ba_p%7D)
(c)Distance travel by police car![=\frac{2v_m^2}{a_p}](https://tex.z-dn.net/?f=%3D%5Cfrac%7B2v_m%5E2%7D%7Ba_p%7D)
The stretch of the spring is
![\Delta x = 0.4 m-0.3 m=0.1 m](https://tex.z-dn.net/?f=%5CDelta%20x%20%3D%200.4%20m-0.3%20m%3D0.1%20m)
The constant of the spring is k=15 N/m, so we can find the force produced by the weight by using Hook's law:
Answer:
All of the above
Explanation:
The correct answer is option E (All of the above)
All the options are alternative source of energy.
The option given are not the traditional way (energy production from coal) of extracting energy as the loss of natural resources does not take place in these source of energy.
energy extracted from wind, solar light , hydrogen ,etc are the source of energy the alternative source of production of energy because do not exploit the natural resources, reduce the carbon emission and energy produced by them is clean energy.