D is incredibly biased and is a leading question, and overall it is a poor excuse for any sort of unbiased surveying.
Refer to the diagram shown below.
The vertical distance traveled is
s = 25 m
The initial vertical launch velocity is zero.
Therefore
s = (1/2)*g*t²
where g = 9.8 m/s²
t = the time of flight, s
That is,
0.5*9.8*t² = 25
t² = 25/4.9 = 5.102
t = 2.26 s
Answer: 2.26 s
Power can be expressed by the product of current and voltage. To see this, consider the units of current and voltage:
![[I]= \frac{C}{s} \\ \\ {[V]=\frac{J}{C}} \\ \\ {[V*I]=\frac{C}{s}\frac{J}{C}=\frac{J}{s}=W}](https://tex.z-dn.net/?f=%5BI%5D%3D%20%5Cfrac%7BC%7D%7Bs%7D%20%5C%5C%20%20%5C%5C%20%7B%5BV%5D%3D%5Cfrac%7BJ%7D%7BC%7D%7D%20%5C%5C%20%20%5C%5C%20%20%20%7B%5BV%2AI%5D%3D%5Cfrac%7BC%7D%7Bs%7D%5Cfrac%7BJ%7D%7BC%7D%3D%5Cfrac%7BJ%7D%7Bs%7D%3DW%7D)
Where C is coulombs (charge), s is seconds, J is joules (energy), and W is Watts, or power. See that watts are Joules per second, or the time rate of change of energy.
Answer:
Chemical and Biological weathering.
Explanation:
Processes that break down and weaken earth minerals are known as weathering. Over time, this can lead to erosion, in which huge sections of rock and stone are carried away, changing landscapes. Physical weathering alters the material structure of rocks, while chemical weathering alters their chemical structure.