Abarge of mass 5.00 ×104 kg is pulled along the erie canal by two mules, walking along towpaths parallel to the canal on either side of it. the ropes harnessed to the mules make angles of 45.0° to the canal. each mule is pulling on its rope with a force of 1.10 kn. how much work is done on the barge by both of these mules together as they pull the barge 141.0 m along the canal?

 219,344.5 j

Explanation:

from the question we have the following parameters

mass of barge (m) = 5 x 10^4 kg

angle of ropes (θ) = 45 degrees

force by each mule (F1) = 1.10 kN = 1100 N

force by each mule (F2) = 1.10 kN = 1100 N

distance (s) = 141 m

work done by the mules = force x cos θ x distance

since we are calculating the force of both mules we have to both mules before we can use in the equation

force = 1100 + 1100 = 2200 N

work done =  2200 x cos (45) x 141

work done = 219,344.5 j

b.

hope this : )

as we know our atmosphere or air have different levels. every level has other gasses, and every gas has another permeability. when the light comes from lower permeability to higher permeability, it changes its direction. so that means that when the light comes from the moon to the earth, it changes it's direction many more times. it basically means that the shape of the light part of the moon is changed on the earth.

hope this ! this is not copied! search it up, it's free of plagiarism!