assuming birdman flies at a height of 99m, how fast should birdman fly to hit the bucket if the bucket is placed 139m from the start of the field

The graph describes the motion of an object. the object moves with from a to b. it from b to c. it moves with from c to d.

Alinearly polarized electromagnetic wave has an average intensity of 196 w/m^2. this wave is directed towards two ideal polarizers (in real polarizers, transmission is also effected by reflection and absorption). polarizer a is oriented with its transmission axis at an angle of θ_1=20.8∘ with the incident electric field. polarizer b has its axis at an angle of θ_2=63.0∘ with the incident electric field. what is the average intensity of the wave after it passes through polarizer a? what is the average intensity of the wave after it passes through polarizer b? suppose that the two polarizers a and b are interchanged. what would the average intensity be after passing through both polarizers?

In an experiment, how can i change human errors? be specific.