An elevator in a tall building is fitted with a counterweight. The total mass of the car and passengers is 668 kg. The counterweight has mass 512 kg. A motor lifts
the elevator car through a distance of 16.2 m in 15.0 s. The efficiency of the motor is 24.0%. Calculate
the total input of electrical power to the motor
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Determine the amount of work done when a crane lifts a 100-n block form 2m above the ground to 6m above the ground

Two polarizers are oriented at 24.0∘ to one another. light polarized at a 12.0-degree angle to each polarizer passes through both. what is the transmitted intensity (%)?

Which configuration would produce an electric current? a) rotate a coil of copper wire between two magnets. b) connect a wire between a copper and zinc strip sitting in a beaker of water. c) connect a wire to the (+) positive end of a battery and the other end to a light bulb. d) connect a wire to the negative end of a battery and the other end to a light bulb.