The slotted arm revolves in the horizontal plane about the fixed vertical axis through point o. the 2.5-lb slider c is drawn toward o at the constant rate of 2.7 in./sec by pulling the cord s. at the instant for which r = 7.9 in., the arm has a counterclockwise angular velocity ω = 5.5 rad/sec and is slowing down at the rate of 2.4 rad/sec2. for this instant, determine the tension t in the cord and the force n exerted on the slider by the sides of the smooth radial slot. the force n is positive if side a contacts the slider, negative if side b contacts the slider.

Identify the arrows that show the correct direction of heat transfer. 66°f 112°f 98°f

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?

What is the weight of a feather (mass = 0.0001 kg) that floats through earth's and the moon's atmospheres?