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(b) you ride in a boat whose speed relative to the water is 8.2 m/s. if the river flows at
1.8 m/s, at what angle should the boat point in order that it arrives at a point directly
opposite, i. e., for the boat to move perpendicular to the shores of the river? [8]

The boat should point in angle to the perpendicular to the shore is, Ф = 12° 22'

Explanation:

Given data,

The velocity of the boat, V = 8.2 m/s

The velocity of the flow of the river, V' = 1.8 m/s

Let Ф formed by the boat perpendicular to the shore,

The two velocity components along the perpendicular axes are V and V'

Therefore,

                                  tan Ф = V' / V

                                             = 1.8 / 8.2

                                             = 0.2195

Therefore,

                                         Ф  = tan⁻¹ (0.2195)

                                              = 12° 22'

Hence, the boat should point in angle to the perpendicular to the shore is, Ф = 12° 22'

answer: 0

explanation: im   14

the working equation for the angular size is the product of the physical size and 360 degrees divided by the product of two pi and distance from earth. the minimum size would be 0.559 degrees while the maximum size would be 0.49 degrees.