Agate with a circular cross section is held closed by a lever 1 m long attached to a buoyant cylinder. the cylinder is 25 cm in diameter and weighs 200 n. the gate is attached to a horizontal shaft so it can pivot about its center. the liquid is water. the chain and lever attached to the gate have negligible weight. find the length of the chain such that the gate is just on the verge of opening when the water depth above the gate hinge is 10 m.

Akg a of 55 m at an of 11 ? . if is at 98 km/h,be ?

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?

Apulley with mass mp and a radius rp is attached to the ceiling, in a gravity field of 9.81 m/s2 and rotates with no friction about its pivot.