A generating station is producing 1.5 x 106 W of power that is to be sent to a small town located 4.8 km away. Each of the two wires that comprise the transmission line has a resistance per length of 3.3 x 10-2/km. (a) Find the power lost in heating the wires if the power is transmitted at 1700 V. (b) A 100:1 step-up transformer is used to raise the voltage before the power is transmitted. How much power is now lost in heating the wires

As part of your daily workout, you lie on your back and push with your feet against a platform attached to two stiff springs arranged side by side so that they are parallel to each other. when you push the platform, you compress the springs. you do an amount of work of 79.0 j when you compress the springs a distance of 0.230 m from their uncompressed length. (a) what magnitude of force must you apply to hold the platform in this position? (b)how much additional work must you do to move the platform a distance 0.230 m farther? (c) what maximum force must you apply to move the platform a distance 0.230 m farther?