The wording of this can be bothersome. I think you should be using
E = F * d
E = 68 J
d = 12 m
F = ???
68J = F * 12 m
68J/12 m = F
5.67 N
A <<<<<====== Answer
-Velocity is the speed of any moving object in a given direction, whilst Speed is the rate of an object's ability to move.
-Velocity can change if the direction or time is changed, the basic equation of velocity is: v = d/t
v - velocity
d - distance
t - time
If one of these factors change, it affects the other.
Hope this answers the question!
I think that the answer is C)
Explanation:
It is given that, the water from a fire hose follows a path described by equation :
........(1)
The x component of constant velocity, 
We need to find the resultant velocity at the point (2,3).
Let 
and 
Differentiating equation (1) wrt t as,
When x = 2 and
So,
Resultant velocity, 
v = 6.4 m/s
So, the resultant velocity at point (2,3) is 6.4 m/s. Hence, this is the required solution.
Spectrum can can different meaning depending on the specific situation. But overall, a spectrum is a large amount of or infinite collection of values that exist withing a certain range. For example, light wavelengths exist on a spectrum becuase there are an infinite number of different wavelengths.
Hope this helps.<span />
