Answer:
electric energy ( power ) = 300000 W
Explanation:
given data
mechanical (hydroelectric) energy = 120 MJ/min = 2000000 J/s
efficiency = 15 % = 0.15
solution
we know that Efficiency of electric engine is expression as
Efficiency = Mechanical energy ÷ electric energy ......................1
and here dam electrical power output is
put here value in equation 1
electric energy ( power ) = Efficiency × Mechanical energy ( power )
electric energy ( power ) = 0.15 × 2000000 J/s
electric energy ( power ) = 300000 W
44,512,992 mm/m. Hopefully...
Answer:
Police powers are the fundamental ability of a government to enact laws to coerce its citizenry for the public good, although the term eludes an exact definition. The term does not directly relate to the common connotation of police as officers charged with maintaining public order, but rather to broad governmental regulatory power. Berman v. Parker, a 1954 U.S. Supreme Court case, stated that “public safety, public health, morality, peace and quiet, law and order. . . are some of the more conspicuous examples of the traditional application of the police power”; while recognizing that “an attempt to define police powers reach or trace its outer limits is fruitless.”
Answer: a) 0.78 s; b) 899.83 m; c) Δx=1150*Δt
Explanation: In order to solve this problem we have to use the kinematic equations for the independent two axis (x-y). The following expressions are:
y=yo+voy-(g*t^2)/2 g is 9.8 the aceletarion of the gravity on the y axis
vfy=voy-g*t
x=xo+vox+(a*t^2)/2 a=o there is not acceleration in the x axis.
vfx=vox+a*t
voy and vox ara the initial velocities for each axis.
yo and xo are the initial positions of teh bullet.
From these equations we can obtain the time
y=0=3-(g*t^2)/2
t^2=3*2/g
t=
t= 0.78 s
To calculate xf= voy*t= 1150 * 0.78= 899.83 m
Finally considering with the last equation we ontain the error in Δx
in the form:
Δx=1150*Δt since is linear the dependance with time.
