A) Water freezing
This is called the process of turning water as a liquid to its solid form which is ice.
Ice is almost together as one unlike liquid. This is why the molecules are more orderly.
The process of freezing is exothermic which means the heat has to be removed in the process.
The Earth takes (365 and 1/4) days to orbit the sun. That's the length of our 'year'.
Since it's not really possible to make our calendar a quarter of a day longer every year, we make the calendar a <u><em>whole</em></u> day longer every 4 years.
So "Leap years" make up for the extra one-fourth day the Earth takes to orbit the sun.
That is wan an exothermic reaction. and that the reactants formed 1 or more different products
PART A)
Electrostatic potential at the position of origin is given by
here we have
now we have
Now work done to move another charge from infinite to origin is given by
here we will have
so there is no work required to move an electron from infinite to origin
PART B)
Initial potential energy of electron
Now we know
now by energy conservation we will have
So here initial total energy is sufficient high to reach the origin
PART C)
It will reach the origin
Answer:
Raul will be 30 meters to the right of observer.
Explanation:
Raul is walking towards the observer, let be the position of Raul with respect to the observer and, besides, that is negative to the left and positive to the right.
Raul is moving at constant rate so that velocity () is equal to:
Where:
, - Initial and final position of Raul regarding the observer, measured in meters.
- Change in time, measured in seconds.
Given that , and , the velocity of Raul is:
The equation of his displacement is represented by clearing final position in the equation above:
If and , the equation of motion is:
Then, if , the final position of Raul regarding the observer is:
Raul will be 30 meters to the right of observer.