How are moving pulleys different from fixed-position pulleys? (points : 3) moving pulleys have more force than fixed-position pulleys. moving pulleys are easier to use than fixed-position pulleys. moving pulleys are attached to the object and move with the object. fixed-position pulleys are connected to a fixed point and do not move. moving pulleys are attached to the object and are stationary. fixed-position pulleys are connected to a fixed point and move freely.

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?

Amagnetic field applies forces on: a)static chargesb)moving chargesc)water flow

Asmall grinding wheel has a moment of inertia of 4.0×10−5 kg⋅m2 . what net torque must be applied to the wheel for its angular acceleration to be 150 rad/s2 ?