Excess fertilizer use results in nutrient pollution by effecting the nutrition values of the plants we eat.
Cutting down trees more likely to result in air pollution by an increase in greenhouse gases.
Pouring oil in drain creates water pollution which is not a nutrient source.
Answer:
Explanation:
The work of force 2 will be given by the vectorial equation . We know the value of and have information about its movement, which relates to the net force .
About this movement we can obtain the acceleration using the equation . Since it departs from rest we have .
And then using Newton's 2dn Law we can obtain the net force F=ma, thus we will have
And we had the work done by force 2 as:
(The sign will be given algebraically since we take positive the direction to the right.)
With our values:
<em>Another (shorter but maybe less intuitive way for someone who is learning) way of doing this would have been to say that the work done by both forces would be equal to the variation of kinetic energy:</em>
<em></em>
<em>Which leads us to the previous equation straightforwardly.</em>
Answer:
B. underwater mountain range
The "legs" of a <em>right triangle</em> form a right angle, so they're perpendicular.
To solve this problem it is necessary to apply the concepts of heat change and thermal efficiency.
The heat rate can be expressed under the function
Where,
m = Mass
Enthalpy at each state
Our values are given as,
From the tables of Enthalpy of Water at 200°C (Saturated liquid state)
At the same time for 80°C
Applying the equation of Heat,
Replacing,
Therefore the efficiency would be
Therefore the actual thermal efficiency of the turbine in percent is 0.0579.